OCR Text |
Show 1877.] ANTHOBRANCHIATE NUDIBRANCHIATE MOLLUSCA. 231 1 E.frondosus, id.; 1 Doris ramosa, Cantraine ; 11dalia ramosa, Phil. ; Idalia crocea, id. Hab. Mediterranean, and south coast of England (Cornwall). 9. TRIOPA YATESII, Angas, Journ. de Conch, xii. p. 60, pl. 5. f. 8 (1864). Hab. New South Wales. Gen. THECACERA, Fleming, 1828. Body limaciform, smooth. Mantle obsolete ; supracapital veil indistinct. Rhinophores laminated. No oral tentacles. Branchiae non-retractile, with linear or tubercular lateral appendages. Odontophore broad, with 12-14 plates ; the two inner on each side bearing bicuspid spines; no central plate. Small lateral corneous jaws. a. Rhinophores with completely surrounding sheaths. 1. T. VIRESCENS, Aid. & Hanc. Ann. & Mag. Nat. Hist. 2nd ser. viii. p. 290 (1851). Hab. S. coast of England (Cornwall). 2. T. CAPITATA, Aid. & Hanc. Mon. Br. Nud. Moll. p. 44, & Append, p. iv (1855). Hab. S. coast of England (Cornwall). b. Rhinophores with partially surrounding sheaths. 3. T. PENNIGERA, Fleming. Doris pennigera, Montagu, Trans. Linn. Soc. xi. p. 17, t. iv. f. 5 (1815). Polycera pennigera, Fleming. Hab. N. European coasts (England, France). Gen. CRIMORA, Alder & Hancock, 1862. Body limaciform. Mantle nearly obsolete, forming a supracapital veil with branched appendages, and a papillated ridge along each side of the back. Rhinophores laminated. Oral tentacles tubercular. Branchiae non-retractile, placed about two thirds down the centre of the back. Tail short, without a dorsal carina. Odontophore broad, bearino* 26 or 27 spines on each side of three kinds; the innermost one is large, hooked, and bicuspid ; the next 5 or 6 are short and obtuse, and supported on subquadrilateral plates; the rest very long, slender, and minutely denticulated on the inner margin. No central spine. C. PAPILLATA, Aid. & Hanc. Ann. & Mag. Nat. Hist. 3rd ser. x. p. 263(1862). Hab. Guernsey. |