86 Moll. 
MOLLUSCA. 
Acme moutoni (Dupuy) distinct from veneta (Pirona) [Mme.] Pau- 
lucci, Bull. Soc. mal. Ital. ix. pp. 5-8. 
Assimineidje. 
Assiminea. Observations on the habits of this genus, taken from 
other authors ; A. Morelet, Le Nat. v. p. 198. 
Assiminea gray ana (Leach) found near Emden, and observed alive ; it 
lives at highwater-mark, and soon leaves the water when thrown into it : 
Borcherding, Abh. Ver. Brem. viii. pp. 329 & 330. 
Assiminea castanea } sp. n., Westerlund, Nachr. mal. Ges. 1883, p. 56, 
Yokohama. 
Assiminea granum (Morelet) = Eydrocena hidalgoi (Gassies), Mayotte 
and New Caledonia ; Morelet, J. de Conch, xxxi. p. 208. 
Cyclotropis, g. n. Near Assiminea ; feelers short, eyes on their tips ; 
umbilicus surrounded by a keel. For Omphalotropis maculata (Martens) 
[Lea. — Rec.] and C. papuensis, sp. n., Fly River, New Guinea. Tappa- 
rone-Canefri, Ann. Mus. Genov, xix. pp. 278 & 279, pi. x. figs. 22 & 23. 
HELICINIDiE. 
Eelicina derepta, sp. n., Tapparone-Canefri, op. cit. xx. p. 167, pi. i. 
figs. 7 & 8, Amboina. ^ 
Eelicina coxeni , Yule Island, New Guinea, and leucostoma , Fly River, 
Southern New Guinea, spp. nn., id. op. cit. xix. pp. 274 & 275, pi. ix. 
figs. 10-13, woodcuts. 
Eelicina durangoana , sp. n., Mousson, J. de Conch, xxxi. p. 218, 
pi. ix. fig. 3, Durango (California). 
Eelicina euglypta (Crosse) and picta (Fer.) varr. from Guadeloupe ; 
Maz6, J. de Conch, xxxi. pp. 37 & 38. 
Eydrocena P dubiosa (C. B. Adams, as Truncatella ) ; id. 1. c. p. 36, 
Guadeloupe. 
SOLENOCONCHiE. 
Dentalium ergasticum , sp. n., alive more than 9 cm. long, depths of 
the Atlantic ; and notes on some other species : P. Fischer, C.R. xcvi. 
pp. 77-79. 
BIYALYIA. 
M. Neumayr proposes, chiefly from a palaeontological point of view, 
a new classification of the JBivalvia ) as follows : — 
Ord. 1. Pal^eoconcile, or Cryptodonta. Shell thin, without teeth, 
or only with feeble indications of them in the hinge ; two equal 
muscular impressions ; pallial line entire. Palaeozoic. 
Ord. 2. Desmodonata. Teeth of the hinge none or irregular, con- 
nected with the ligamental processes; two equal muscular 
