144 
REPORT ON ZOOLOGY, MDCCCXLII : 
Arthur Hill Hassall gives some remarks on the Gymno- 
hranchia found in Dublin Bay. (Ann. ix. p. 133.) 
Lowe has described a new genus of Gymnohranchia (Proc. Zool. Soc. 
1842, p. 51), and names it Peplidia. Corpus limaciforme, repens, ob- 
longum ; postice compresso- triquetrum, dorso abrupte cristatum seu 
alato-carinatum ; apice attenuate, acute. Caput antice veliferum ; velo 
semicirculari, margine fimbriato-lacero, ciliolato ; ore inter labia baccalia 
subtus, simplici. Tentacula duo. Orificium generationis ad colli dex- 
trum. Branchiae diplomorphae ; seu in medio dorsi circa anum stellatim 
ramosae, arbusculiformes, ramis pectinato-ciliatis ; et per latera utrinque 
longitudinaliter biseriatae, conico-papilliformes, papillis apice subdivisis, 
ciliatis. One species, P. maderce. 
Mbller also describes several new species in his Index 
Molluscorum Groenlandise ; viz. : — 
Tergipes rupium ; yellow, with six dorsal papillae on each side, which 
are also yellow, with white tops and a yellow ring at the base. Doris 
liturata, Beck. ; depressed, yellowish, with a broad chestnut-brown 
line on the back ; sixteen branchiae. D. acutiuscula, Stp. Euplocamus 
Holbollii ; prismatic pale yellow green ; anus in middle of back ; three 
branchiae. 
ASPIDOBEANCHIA. 
Emarginula conoidea, Lovell Reeve. (Proc. p. 50.) 
CYCLOBRANCHIA. 
Patella insessa, .Hinds, Ann. x. p. 82; oval, brown, transversely 
striolate, internally white ; apex with white spots : California. 
P. cerea, Moller, 1. c. ; depressed, milk white, rough ; vertex somewhat 
forward, yellowish. 
Patelloida depicta, Hinds, Ann. x. p. 82 ; very small, linear, white, 
with irregular broken rays diverging from the apex ; length four times 
the breadth : California. 
Siphonaria characteristica, Lovell Reeve, Proc. 1842, p. 49; from 
Panama. 
Parmophorus corrugatus, from Madagascar; and P. intermedivs, 
from the Philippines, have been described by Reeve. (Proc. p. 50.) 
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