192 Transactions of the Royal Canadian Institute 



Nanoose Bay in from 12-20 fathoms. They were brought in alive and 

 kept so some hours before preserving. The smallest specimen which was 

 about 6 mm. long was nevertheless conspicuous on account of its bright 

 colour. 



Family Tethymelibidae (Eliot). 



Head broad, surrounded by a funnel shaped velum or hood ; no radula ; 

 dorsal appendages foliaceous. 



Genus Chioraeridae gen. nov. 



No radula; no jaws; dorsal appendages large foliaceous and with no 

 sign of branchial tufts. Foot narrow. No rhinophores. 



Chioraera leonina (Gould). 



Chioraera leonina Gould, "United States Exploring Expedition ". Adams, 

 "Genera of Recent Mollusca", 1858, Vol. II, p. 71 and 633. Cooper, 

 Proc. Cal. Acad. Sci., Vol. Ill, p. 60. 

 Chioraea leontina Fewkes, ' ' New Invertebrata from the Coast of Cali- 

 fornia", 1889, p. 45. 



Body. — The body is fairly long limaciform and rounded. The dorsum 

 is not sharply marked off from the sides but the line of junction is indi- 

 cated by the insertion of five pairs of foliaceous appendages. The head 

 is provided with a large sub-globular velar hood which is bilobed and 

 has a deep notch at the front. The inner margin of the hood is provided 

 with a double ring of tentacles. On the dorsal side of the hood are a 

 pair of auricular appendages in the form of semi circular flaps which have 

 no sign of short tentacles as in Tethys. The junction of the hood and 

 body is marked by a distinct constriction or "neck". The anus is a 

 small circular opening lying on the dorsum slightly to the right of the 

 middle line and somewhat nearer the second than the first dorsal appen- 

 dage. The genital aperture is also inconspicuous and is situated on the 

 right side of the body at the front end just in the bend of the neck. 



Colour. — The whole animal is of a very pale yellowish or whitish grey 

 but is gelatinous and so transparent that most of the internal organs can 

 be seen through it. It is marked by a ramifying series of fine more opaque 

 lines which form a network all over the body and dorsal cerata and 

 partly into the hood. 



Dimensions. — Gould (9) records a specimen of 5 ins. in length, a size 

 I have not seen approached in many hundreds of specimens. The body 

 is capable of extension in life and the hood varies very much according 

 to the amount of its expansion. The largest specimen measured alive 



