GASTROPODA (nudibranchia) . MolL 69 
Do7'is setigera (Rapp) is probably a graiidiflora bearing bristles of 
Annelides (?), implanted into its skin ; id. 1. c. p. 298, footnote. 
Doriopsis nigi'a (Stimps.) var. n. ccerulea^ Bergh, Verb. z.-b. Wien, xxx. 
pp. 181-184, anatomical description, Japan. 
Doriopsilla, g. n. Distinct from Doriopsis by its somewhat rigid and 
granulated mantle. D. areolata, sp. n., Bergh, JB. mal. Ges. vii. pp. 316- 
326, pi. ii. figs. 3-11, anatomical description, Civita Vecchia. 
POLYCERIDiE. 
Polycera. 11 species enumerated, P. pallida, sp. n.. Northern Pacific, 
anatomically described by Bergh, P. Ac. Philad. 1880, pp. 105-111, pi. xv. 
fig. 14, pi. xvi. figs. 1-9, 19, & 21. 
Eiiplocamus croceus (Phil.), genital organs figured ; id. Verb. z.-b. 
Wien, xxx. pi. x. figs. 1 & 2. 
Eiiplocamus japonicus, sp. n., id. op. cit. xxix.[1879] pp. 636-639, pi. xiii. 
fig. 17, pi. xiv. figs. 3-10, Japan. 
Plocamoplioi'us tilesii (Bergh), Japan. Genital organs figured ; Bergh, 
Verb. z.-b. Wien, xxx. pi. x. figs. 3-6. 
Ancula cristata (Aid.), id. 1. c. xxx. p. 629, pi. x. figs. 6-9, pi. xi. 
figs. 3-12, full anatomical description : specimens from the Baltic Sea, even 
from the western shore of the island Fohr, have no spicula in the skin. 
Ancula sulphurea (Stimps.) from North America is probably only a 
local variety. 
Di'cpania (Lafont, 1874) gi'ccffii, sp. n., id. L c. p. 636, pi. x. figs. 10-15, 
Trieste. 
Triopa (Johnst.). Generic characters discussed, 5 known species enu- 
merated, and T. clavigcra (Miill.) anatomically described; id. 1. c. 
pp. 640-645, pi. xiii. figs. 9-11, pi. xiv. figs. 1-3; anatomical figures by the 
same also in P. Ac. Philad. 1880, pi. xiii. figs. 15-20, pi. xiv. figs. 21 & 22, 
pi. XV. figs. 12 & 13. 
Triopha, g. n. Distinguished from Triopa by nodose or shortly ramose 
dorsal appendages and ear-shaped lower tentacles; 5 tripinnate branchial 
plumes; mouth with two strong horny plates ; 3-4 lateral and 10-11 
external (uncinal) plates on each side in the radula. T. modesta, sp. n., 
N. Pacific. Bergh, P. Ac. Philad. 1880, pp. 112-117, anatomical figures, 
pi. xiv. figs. 17-20, & pi. XV. figs. 1-11. 
Issa, g. n. Frontal and dorsal appendages less developed than in 
Triopa, mouth with triangular jaw, lingual armature consisting of a 
median (rhachidian) row of plates, two strong lateral and seven external 
(marginal) plates. I. lacera (Mull., as Doris), North Sea. Bergh, Verb, 
z.-b. Wien, xxx. pp. 545-649, pi. xiii. figs. 12-15, pi. xiv. figs. 11 & 12. 
Colga, g. n., id. Nudibr. N. Pacif. Oc. ii. (1880) p. 261, is the same genus 
but the name is pre-occupied. 
.^gires punctiluccns (Orb.), Bergh, Verb. z.-b. Wien, xxx. pp. 651-655, 
pi. X. figs. 16-19, pi. xi. figs. 14-19, pi. xii. figs. 1-4, pi. xiii. fig. 1, North, 
Sea, and leucharti (Verany), id. 1. c. pp. 655-658, pi. xii. fig. 15, pi. xiii. 
figs. 2-8, Mediterranean, both anatomically described. 
