list 



ci.loMi'.i:. 



The in.wphaguA, of a fnir Irinttli. .1. ~-fii,i-. lYoin th.- mouth tln..u_-li 

 the neck, and i dilatod into a stomach toward* the bottom ! tin- 

 ma**. Th. n. , ill.' intestinal canal, after baring tna.li' one f.il.l. pr.. 

 oeeds dirvutly t. tin- vent, itu:>i.'.l un.liT the gill of the left side. The 

 liver in composed of many lobe* and lobule*, and envelop* the 

 (tooiach and a great part of the intestinal canal. Two long and 

 straight salivary glands float at the ride* of the OMophagu* ; their 

 excretory ducU are inserted in the mouth. (Cuvier.) 



Clio borfali*. 



Fig. 1, view of the back; a, the body ; i, the viscera, teen through the 

 common inti-giimenis ; c. r, the tubercle* of the head, and the hole* wherein the 

 three trnUcali an each ide are withdrawn ; d, d, gill* and tin. Vie. 2, 

 cite mat, view of the belly ; a, r, d, indicate the name parti aa in fig. 1 ; 

 r, the two tentacula placed before the mouth. Fig. 3, r, d, indicate the same 

 part* as in the two former figure* ; /, /, the external tunic or nkin ; g, g, the 

 internal tonic or flenhv pannicle ; A, A, the principle bundles of its fibres ; 

 i, the mau of viscera ; , the principal vein of the Kills. 



The brain consists of two lobes placed at the origin of the oeso- 

 phagus. Krom each of these springs a small filament, which swells 

 into a large ganglion that unites itself to its correspondent under the 

 oaaophagus. These two ganglions give out each their filaments to the 

 in ]L'lilurii>K parts. Two of these filaments, one on each side, swell 

 again into ganglions, which, uniting together by a new filament that 

 traverses upon the (esophagus, form there a second collar joined to 

 the first beneath ; they give out a filament, which is twice swollen or 

 knotted, and it is from these small knots of medullary matter that 

 thi- .litferent n.-rves arise. No eye could be perceived, nor any par- 

 ticular organ of the external senses, except the common and general 

 organ of touch. (Cuvier.) 



Kach gill gives off a vein, which, uniting to its correspondent in the 



sha|>e f n V, form* tin- trunk which reache* the ln-nrt. This lant, 

 .-itniit.-.l in its |H'riplium <m tin- I. ft Hide ..!' tin- mass of viscera, 

 gives out, douotliiw, arteries for the whol* body, l.ut they could not 

 be folli'v<l .ml (('IIVUT.I 



In tin' reproductive organ* they very much resemble the Gastro- 

 pods, and unit.', like them, the two sexes. The ovary gives off a 

 delicate and short oviduct, which reaches the testicle. This last, 

 which at its origin resembles a ca-cum, lessens by degree* into a de- 

 ferent canal, and terminates at a small round purae, which tills the 

 left tubercle of the head, and has iti exit near the neck. It in nn.l.'- 

 termined whether the straight and firm part which terminates the 

 il.-f.T.'iit canal is the male organ, or \\li.-tlirr that organ is hid.lt n in 

 the small purse above noticed. At the side of this pun* i- ui.>thn 

 oblong one, analogous to that which is termed the bladder (la vessie) 

 in the ordinary Gastropods. (Cuvi. r > 



Dr. Leach says, "In 1 81 1, during a tour made by me to the Orkneys 

 with some friends, I observed on the rocks on that side of the Isle of 

 Staffa, several mutilated specimens of this animal. The three previous 

 days had been extremely stormy so as to confine us to the !-! of 

 ColiiMxa. Some dayn afterwards I borrowed from a fisherman a large 

 shrimp-net, and on rowing along the coast of Mull when the sea was 

 calm, after many vain effort*, I was at last enabled to catch one of 

 them alive." This specimen is now in Hi" F.riii-h Museum ; others 

 are in the Museum of the Royal College of Surgeons. 



The figures and description above given (Cuvier' s) are taken from an 

 individual which had its tentacula, &c., withdrawn. 



ft Species without tentacula (>), and whose cephalic enlargement (renfle- 

 iii.'iit) is separated from the trunk by a sort of narrow and very 

 distinct thorax. (Genus, Cliodita of Quoy and Gaimard.) 

 Example, Clio(Olioditft) cadaceiu. De Bluinville observes that this 

 species is too incompletely known to allow of a satisfactory conclu- 

 sion as to what it is ; and he even thinks that it may be identical with 

 the C. atutralit of Bruguieres. 



Pnfumodermon. -Animal oblong, sub-cylindrical, divided hit 

 very distinct parts, the anterior conical, the posterior oval. The fins 

 placed near the separation of these two part*, and presenting between 

 them, and on the ventral side, a small ni.'nilinin.ms appendage. Mouth 

 at the extremity of a nort of retractile proboscis, having, at its base, 

 two bundles of tentacula, each terminated by a amall disc or nucker. 

 Gills .situated at the posterior part of the body, and disposed some- 

 what in the form of two C's placed back to back, OC, and separated 

 liy two small bars. Vent on the right, and a little anterior t.. tli.' 

 gills. Orifice of the organs of generation in a common tubercle, 

 situated at the root of the fin of the right side. 



P. Peronii. This is about an inch in length, and was discovered in 

 the Atlantic Ocean by Pdron. The genus was established by Cuvier. 

 De Blainville founded his character upon many well-preserved indi- 

 viduals brought home by Messrs. Quoy and Gaimard from the expedi- 

 tion under Captain Freycinet, and gives Australasia as the locality of 

 the species. 



END OF VOLUME I. 



tuvaT AXD ITAKS, 



wiilTrrlA. 



