376 POLYCERIDA 
Rhinophores laminated, retractile. Foot narrow. Oral aper- 
ture armed. Odontophore with numerous minute spines, none 
median. 
KALINGA, Ald. and Hane., 1864. Body oval, subprismatic. 
Margin of mantle most developed in front, where there is a row 
of close-set papillated processes extending over the head; a few 
similar processes are upon the sides of the back. Rhinophores 
laminated. Oral tentacles flattened. Branchie non-retractile, 
placed separately in a circle at some distance around the anal 
opening. Odontophore broad, with numerous rather distant 
rows of tricuspid spines. No jaws oreollar. Distr.—C. ornata, 
A. and H. Coromandel Coast. 
Triopa, Johnston, 1838. 
Syn.—Tritonia, Lam., 1801. Binsnisto, Oken (part), 1815. 
Euplocamus, Philippi, 1836 (part). Cadophora, Gray, 1840. 
Distr.—9 sp. Universal. 7. claviger, Mull. (xe, 3). 
Body more or less depressed ; mantle small, covering the head, 
the margin with linear subclavate or branched appendages ; 
rhinophores laminated; oral tentacles cylindrical or ovoid; 
branchie few, non-retractile. Odontophore broad, with numerous 
plates, the two or three inner ones with large spines, none 
central. 
Triopa was instituted by Johnston for the Doris clavigera of 
Muller. Messrs. Alder and Hancock proposed to retain as well 
the genus Euplocamus for EZ. croceus, Philippi. The differences 
between the two genera, however, appear to be more of degree 
than kind, and serve better for distinguishing sections of one 
genus; moreover the latter name is in general use for a genus of 
insects as well as fora genus of birds. Euplocamus originally 
took in the Idaliz. Oken’s Themisto included Polycera quadri- 
lineata and Triopa clavigera. 
LATERIBRANCHIAZA, Stearns. Animal like Triopa, with a single 
series of gills on each side, central or subcentral and opposite. 
L. festiva, Stearns. California. 
TRIOPELLA, Sars. 
Distr.— T. incisa, Sars. Norway. 
Distinct from Triopa by the broad mantle, which is bilobed 
behind, and has two longitudinal ridges on the back ; radula like 
that of Adgirus. 
TriorHa, Bergh, 1880. 
Distr.—T. Carpentert, Stearns. W. Coast of America. 
Distinguished from Triopa by nodose or shortly ramose dorsal 
appendages and ear-shaped lower tentacles; five tripinnate 
branchial plumes ; mouth with two strong horny plates. Radula 
with 3-4 lateral and 10-11 external ; (upetpad) plaigtai on nepeh 
side. =. 3 
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