372 DORIDID A. 
two bicuspid spines, one each side, in each transverse row; no 
central spine, spinous collar, or under jaw. 
LAMELLIDoRIS, Ald. and Hance., 1855. 
Syn.—Onchidoris, De Blainyv., 1816. Onchidorus, Ferussac, . 
1821. Onchidora, Cuv., 1830. Villiersia, d’Orb., 18387. Oncidio- 
doris, Agassiz, 1847. Oncodoris, Agassiz, 1847. 
Distr.—23 sp. E. Coast of N. Am., W. Coast of Europe, and 
New Zealand. L. Leachti, Blainv. (xe, 95). L. scutigera, d’Orb. 
(xe,,.96). 
Body depressed ; mantle large; head with a veil in place of 
oral tentacles ; branchiz 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. JL. 
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. 
ACANTHODORIS, Gray, 1850. 
Distr.—4 sp. Universal. A. pilosa, Mull. (xe, 97). 
Body convex; mantle moderate in size, covered with soft 
papille ; oral tentacles united ina veil, with free flattened lateral 
ends; branchie 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. 
Dictyoporis, 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 pleure, the teeth hook-like, the external 
pectinate at the tip. No peculiar armature in the lips or penis. 
DratLuna, Bergh, 1879. 
Distr.— D. Sandiegensis, Cooper. 
Back minutely shaggy; tentacles finger-shaped; gill-leaves 
tripinnate ; radula without median plates. 
ARTACHAA, 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. 
