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Show 240 MR. P. S. ABRAHAM ON THE [Mar. 6, 7. POLYCERA DUBIA, Sars, Bidrag, p. 13, t. 2. f. 5, 6 [sec. Sars, Besk.og Iagtt. 1835]. Idalia dubia, Gray. Hab. Norway (Bergen). 8. P. COOKI, Angas, Journ. de Conch, xii. p. 58, pl. 5. f. 6 (1864). Hab. Australia (Botany Bay). 9. P.? CAPENSIS1. Polycera capensis, Qu. & Gaim. in Freycinet, Voy. des Corv. l'Uranie et la Physic, Zool. p. 417, pl. 66. f. 4 (1824). Hab. Cape of Good Hope. Gen. BRACHYCHLANIS, Ehrenberg, 1831. Mantle very small, forming a dorsal arena, with narrow upturned border. Rhinophores laminated, arising in front of the mantle-margin. Branchiae retractile. Mouth terminal. B. PANTHERINA, Ehr. Symb. Phys., An. evert, excl. ins. Hab. Red Sea. Fam. III. DORIDOPSHLE, Alder and Hancock, 1864. Dom-like Mollusca, without well-developed spicula in the integument, with the mouth suctorial, opening on the front margin of the foot, with a retractile proboscis, but destitute of odontophore, jaws, or spinous collar. The absence of an odontophore, so generally possessed by the cephalophorous Mollusca, justified Messrs. Alder and Hancock in raising this group to the rank of a family. Gen. DORIDOPSIS, Alder & Hancock, 1864. Doriopsis, Pease, 1860; Rhacodoris, Morch, 1863 (part of); Haustellodoris, Pease, 1871. Body more or less depressed, ovate or elliptical. Mantle ample, covering the head and the foot, smooth or with soft tubercles, and without marginal appendages. Rhinophores laminated and retractile within cavities. Head indistinct, generally with two small lateral lobes, but without proper oral tentacles. Branchiae generally ramose, retractile with the anus into a common cavity. This genus, as thus characterized, was first constituted by Alder and Hancock. Mr. Pease's "Doriopsis" had previously been published; but, as defined by him2, no one could consider it 1 The description and drawing are too imperfect to determine whether this is a Polycera or not. 2 " Oblong or oval, depressed. Mantle large, covering head and foot. Dorsal tentacles two, lamellated and retractile, non-pedunculate. Orals none. Branchial plumes disposed in the form of a semicircle, on the posterior portion of the back, and retractile into a similarly formed slit, the convex portion posteriorly."- P E A S H , 1860. |