Fam. 2, Plate 2. 

 TRITONIA HOMBERGII, Cuvier. 



T. oblongo-ovata, subconvexa, fusca, purpurascens, vel carneo-albida ; velo bilobato digitato- 

 fimbriato ; dorso tuberculato ; branchiis numerosis, frondoso-pluniosis, ad latera dorsi utrinque 

 dispositis. 



Limace de Mer palmifere, Diquem., Journ.de Phys. 1785, pi. 2. (sec. Cuv.) 

 Doris frondosa, Mull., Zool. Dan. Prod., p. 229 ? 



Gmel., Syst. Nat., p. 3107. 

 Tritonia Hombergii, Cuv., Mem. du Mus. v. 1., p. 483, pi. 31, f. 1, 2. 

 Blainv., Man. de Malac., p. 487, pi. 46, f. 6. 

 Lam., Anim. s. Vert. 2d ed., v. 7, p. 454. 

 Bouch. Chant., Catal. des Moll, du BouL, p. 37. 

 Plem., Brit. Anim., p. 284. 

 Forbes, Mai. Mon., p. 3, pi. 1, f. 5. 

 Johns., in A.nn. Nat. Hist. v. 1., p. 114, pi. 3, f. 1, 2. 

 Leach, Syn. Moll. Gr. Brit., p. 24, pi. 7, f. 2. 

 DalyelL Pow. Creat., v. 2, p. 271, pi. 38, f. 1, 2. 

 atrofusca, Macg., Moll. Anim. Aberd., p. 346. 

 Splmrosioma Jamesonii, Tdem, p. 336. 

 Hab. In deep water, on all parts of our coast. 



Body from three to six, and sometimes even eight inches long, oblong, rather depressed, 

 subquadrilateral, rounded on the back, and tapering to a blunt point behind ; varying in 

 colour from dark purple-brown, to light brown, flesh-colour, and yellowish white. The back 

 is covered with large, unequal, soft, warty tubercles, often much mamillated and sometimes 

 slightly branched towards the posterior extremity of the body. Veil strongly bibbed, and 

 margined with numerous small digitations, terminating on each side with a stout tentacular 

 process visible only from the under side. Tentacles cylindrical below, rising above into a 

 fasciculus of pectinated or branched filaments of equal size, with a stout, plain, truncated 

 process appearing a little above them behind. They are retractile within rather wide 

 sheaths, expanded and turned over at the top, with the margin irregularly scalloped or 

 undulated. Branchice set along the sides of the back on a much undulated pallial expansion, 

 and forming a continuous row of beautifully laminated plumes of unequal size. The larger 

 ones, five or six in number, are placed at intervals, rise upwards, and tarn over on the back : 

 they consist of a short cylindrical pedicle, from which bipinnate branches spread over in a 

 horizontal direction. The intermediate plumes are of the same character, but smaller, inclining 

 outwards, and becoming rudimentary towards the posterior extremity, where they meet in a 

 point very close to the tail. The sides of the body are a little elevated, concave, and smooth 

 or very faintly tuberculated. Foot rather broad, transparent yellowish white ; grooved and 

 rounded in front, and produced into a blunt point behind. 



