GASTROPODA (nudibranchia), [solenogastra] . Moll, 61 
Tetliys. A somewhat enigmatical parasite, not named, apparently 
belonging to the Rhahdoccda and near GraffiMa (Ihering), found within 
the foot ; A. Lang, MT. z. Stat. Neap. ii. [1880] pp. 107-112, pi. vii. 
Dendronotid.®. 
Dendronotus elegans, sp. n., Verrill, P. U. S. Nat. Mus. iii. p. 385 
[1880], Southern New England. 
iEoLTDIDJ:. 
The Mediterranean species enumerated by N. Tiberi, Bull. Soc. mal. 
Ital. vi. pp. 225-237. 
Coryphella nohilis, sp. n., Verrill, P. U. S. Nat. Mus. iii. p. 388 [1880], 
off Cape Cod, 75 fath. 
Coryphella parvula (Pease), figured ; Bergh, Mal. Untersuch. Suppl. 2, 
pi. G, fig. 17. 
Montagna corjii^ sp. n., Hutton, Tr. N. Z. Inst. xiii. p. 203, Port 
Cooper, New Zealand. 
Costma, g. u. “ Branchiarum fasciculi seorsim conglobati, communi 
petiolo insidentes.” Type, Doris affinis (Gmelin), second species Molis 
digitata (Costa), both in the Mediterranean. Tiberi, Bull. Soc. mal. Ital. 
vi. pp. 231 & 232. 
Cratena veronica; , sp. n., Verrill, 1. c. p. 389 [1880], off Cape Cod, 23 fath. 
ELYSIIDiE. 
Placobranchus variegatus (Pease), anatomical description ; R. Bergh, 
Mal. Untersuch. Suppl. 1, pp. 5-7, anatomical figures, pi. d, figs. 30 & 33. 
Elysia viridis (Mont,), anatomical description ; id. 1. c. Suppl. 1, 
pp. 1-4. Pterogastron helium and? ornatnni (Pease), are referred to the 
same genus and figured from drawings by Pease ; id. 1. c. Suppl. 2, 
pp. 79 & 80, pi. G, figs. 18 & 19. 
[SOLENOGASTRA.] 
Proneomenia sluiteri (Hubr., 1880), full anatomical description, in 
English, by the author in Nierderl. Arch. Zool. Suppl. i. 2, 75 pp. 4 pis. 
To the particulars already mentioned in Zool. Bee. xvii. Moll. p. 71, the 
following may be added ; The longitudinal lateral nerves are connected 
by a regular series of commissures to the pedal nerves, and these latter 
are also inter-connected by similar commissures. Lumen of the intestine 
obstructed by deep transversal folds. Generative system perfectly 
symmetrical, the germ-gland lying along the whole length of the body. 
Circulatory system completely lacunar; no gills. This genus differs 
from Neomenia by the presence of a radula, by the multiple layer of 
spicula in the integument, by the absence of branchiae at the posterior 
extremity, and by the absence of special male generative ducts, as vas 
deferens, receptaculum seminis and penis. The author proposes to place 
the genera Neomenia^ Proneomenia, and Chcetoderma, into a distinct Order, 
Solenogastra, characterized by the ventral groove ; this Order and that of 
the Polyplacophora (Chitonidee), will form the class Amphineura, which is 
