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Symptomatic of a contemporary concern with affective factors in cognitive processing, a corpus of research is now emerging on the role of interestingness in discourse processing. This research has concentrated on narrative prose and has adopted a structural approach, arguing for the centrality of event and discourse structure in producing an affect like interest. The authors point out that this approach considers only one type of interest—knowledge‐triggered—to the exclusion of another important type—value‐triggered. A more comprehensive understanding of interest will only be achieved by researching other genres, such as exposition, and by considering the multiple sources of interest‐producing conditions. We suggest the notion of “informational significance” as an inclusive term, and underline the need for a process‐based understanding of interest.

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Meyniel's conjecture is one of the deepest open problems on the cop number of a graph. It states that for a connected graph G of order n, c(G) = O( √ n). While largely ignored for over 20 years, the conjecture is receiving increasing attention. We survey the origins of and recent developments towards the solution of the conjecture. We present some new results on Meyniel extremal families containing graphs of order n satisfying c(G) ≥ d √ n, where d is a constant.

Frisch, and Joblot have given figures at least, and some of them descriptions, of several species, while SchcefFer has written three separate memoirs upon three different gqnera, with minute details, and many illustrative figures. Linnaeus in 1758 arranged all that were then known under one genus, Monoculus, except two ; and GeofFroy, Strom, Goeze, Herbst, and De Geer soon afterwards added to the number. It is to the celebrated Danish naturalist, Otho Fredericus Miiller, however, that we are most indebted. To him we owe the collecting the various species already made known into one * Miiller, Entomost., p. 2. IB\ * " It is the common opiuiou that it is the Caligi which force the salmon from the sen, up rivers towards the waterfalls." * Entomost., p. 12. -f Loc. cit., p. 7. * Letter from Mr. Paterson to Mr. TempletoB, in the Memoir on Anomalocera, in Trans. Ent. Soe., ii, part i, 39. SYSTEMATIC AERANGEMEINT. The systematic arrangement of the Crnstacea has been a matter of considerable discussion amongst naturahsts. Desmarest, in his work,* has given a series of tabular views of the various arrangements which different authors have suggested, from Linna3us to his own time. For a complete view of these we refer the reader to him, and shall only notice a few of the more prominent here, as far as the Entomostraca are concerned. Linnaeus places the Crustacea in the class Insecta, order Aptera, and refers all the species of Entomostraca then known, with the exception of two, to one genus, which he calls Monoculus. Fabricius also places the Crustacea amongst the Insecta; the genus Monoculus, embracing most of the Entomostraca, being placed in his Class viii, Polygonata, and the genus Limulus in the ixth, Kleistognatha.f Mliller, following his predecessors in arranging the Crustacea amongst the Insecta, places of course the Entomostraca in that class also.| He divides them into two great sections, according to the number of eyes, viz. Monoculi and Binoculi. These he subdivides again into Univalves, Bivalves, and Crustacei, according to the form of the shell or covering in which the animal is inclosed. Latreille^, andCuvier, || in their first published Methods, also placed the Crustacea amongst the Insecta, the former adopting the arrangement of Miiller with regard to the Entomostraca, and dividing them into two families, the * Cousid. geu. sur les Crustaces, 1S25. f Systema Eutomolog-ia;, 1775 ; Eutomologia Systematica, 1793. X Entomostraca, 1785. § Precis dcs Caractercs gen. des luscctcs, 1796. il Tableau element, de I'Hist. Nat. dcs Animau.x, 179S. * Lc R("giic Auiinal, divis. cii 9 Classes, &c. * * * * here provisionally. Genus Notodelphys. * Beitrage zur Ajiatomie der Insecteu, Wiedemann's Zoologisches Magazin, TS17. t Isis, 1830. :;; Dc Apodis caucriformis ; Schoeif., Anatome et Historia evolutiouis. Bonna;, 1841. APODID.E. 2i Berthold, to be blood-vessels. Zaddach describes them very particularly, and reckons the number to be nine. The internal plate or membrane which covers the inner surface of the cephalothorax, ...

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