372 DORIDID^. 



two bicuspid spines, one each side, in each transverse row ; no 

 central spine, spinous collar, or under jaw. 



Lamellidoris, Aid. and Hanc, 1855. 



Syn. — Onchidoris, De Blainv., 1816. Onchidorus, Ferussac, 

 182i. Onchidora, Cuv., 1830. Villiersia, d'Orb., 1837. Oncidio- 

 doris, Agassiz, 1847. Oncodoris, Agassiz, 1847. 



Distr — 23 sp. E. Coast of N. Am., W. Coast of Europe, and 

 New Zealand. L. Leachii, Bla-iuy. [xc^ 25). L. scutig era, d^Orh. 

 (xc, 96). 



Body depressed ; mantle large ; head with a veil in place of 

 oral tentacles ; branchiae simply pinnate, set in an open circle or 

 ellipse, non-retractile. Odontophore narrow, with a few spines 

 in each transverse row. 



AciODORis, Bergh, 1879. General form like Lamellidoris, but 

 suctorial proventricle simple, and 12-13 lateral teeth on the 

 radula ; male organ armed with simple or forked hooks. L. 

 lutescens, Bergh. N. Pacific. 



ADALARiA, Bergh, 1879. Like Lamellidoris, but radula with 

 small flat (spurious) median plates and a large hook-shaped 

 lateral tooth. A. Pacifica, Bergh. 



AoANTHODORis, Gray, 1850. 



Distr. — 4 sp. Universal. A. pilosa., Miill. (xc, 97). 



Body convex ; mantle moderate in size, covered with soft 

 pnpillae ; oral tentacles united in a veil, with free flattened lateral 

 ends ; branchiae united at the base, non-retractile. Odontophore 

 narrow, with two large spines and several rudimentary ones in 

 each transverse row ; none central, usually a spinous buccal 

 collar and rudimentary under jaw. 



DiCTYODORis, Bergh, 1881. 



Distr. — D. tessellata, Bergh. Pelew Islands. 



Body depressed, coriaceous, smooth above ; branchial aperture 

 rounded, with few compound gill-leaves ; tentacles finger-shaped ; 

 foot in front scarcely bilabiate. Radula without median plate, 

 and with many-toothed pleurae, the teeth hook-like, the external 

 pectinate at the tip. No peculiar armature in the lips or penis. 



DiAULULA, Bergh, 1879. 

 Distr. — D. Sandiegensis, Cooper. 



Back minutely shaggy ; tentacles finger-shaped ; gill-leaves 

 tripinnate ; radula without median plates. 



Artach^a, Bergh, 1881. 



Distr. — A. rubida, Bergh. Philippines. 



Body, depressed, verruculose above ; tentacles finger-like ; 

 branchial leaves tripinnate ; foot rounded in front ; penis armed 

 with hooks. 



