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Bruguière Encjcl. méth. Tab. LXXXVIII, Fig. i. (198) * Pèron Àrm. duMus. de Paris lom. i5 , T;ib. II, Fig. i5. Ciivier Méin. sur la Pterotrachée Tab. Ili , Fig. i5. Macri Jet. Soc. Borb. tom. 3 ined. Pterotrachea navigera (i). (i) De Pterotrachea observationes clar. professoris Xav. Magri. Cliaracteres generici. Corpus liberum^ohlongum, peUiicìdnm , carne seu gelatina , ut dicunt , maxime dura , seu tendinea , rei clmrtilaginea fahrefactum , fjunctis mìnimis aliquaniulum exianiihus hinc aique illinc exasperatum , ore patido circidari. Collum longiim , prohoscidi persimile. Oculi duo Totundi ad colli hasim. Ahdom.en carinatum , ìnjlatum 3 cauda longa^acuta. Pterotrachea navigera. Cliaracteres specifici. Pinna suhrotunda , gelatinosa , mohdi , ad superiora caudam versus , parva navicula Nautilii modo ad ahdomen.

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