B1VALVIA. 
Moll. 93 
Jolya (Bourg.). Periostracum extending beyond the margins of the 
calcareous shell, as in Solenomya ; ligament internal ; hinge formed by an 
elongated lamella in each valve, both meeting together, if the shell is 
closed, but not encasing reciprocally : a long whitish rectilinear scarcely 
prominent ray from the umbones to the postero-dorsal angle. J. letour- 
neuxi (Bourg.), from the banks of the River Harrach in Algeria ; the 
author thinks that it lives in deep mud, and proposes a new family for it, 
Joly[i]dcv, to be placed between the Iridinidce and Mycelopidcc. Bour- 
guiguat, Lotfcros Malacologiquos, pp. 42-44, figs. 13-15. 
Dreisseniid^:. 
Dreissema belgrandi (Bourguignat, MS.), sp. n., Locard, Oat. Moll. Fr. 
p. 367, Paris and Arles. 
MYTILIDiE. 
Mytilus edulis (L.), the Mediterranean form [galloprovincialis] (Lam.), 
and M. barbatus (L.) [ Modiola ] : notes concerning their cultivation in 
Italy, chiefly in the “ mar piccolo ” at Tarento, by A. Issel, Ostricoltura e 
Mitilicoltura, pp. 209-228. 
Mytilus graycinus (Dkr., 1853) —dunkeri (Reeve) ; Dunker, Moll. Jap. 
p. 221, Japan. 
Mytilus bifurcatus (Conrad) is found at San Diego, California, together 
with a species of Septifer, which is only distinguishable from it by exami- 
tion of the inside [?], and is figured by Reeve under the same specific 
name ; Stearns, P. Ac. Philad. 1882, pp. 241 & 242. 
Modiola lutca (Jeffreys, MS., Mytilus ), sp. n., Fischer, J. do Conch, xxx. 
p. 52, Bay of Biscay and Morocco, G77-9G0 metros. M. polita , Yerr. 
& Smith, is the same species ; Dali, Am. Nat. xvi. p. 884. 
Modiola hanleyi , sp. n., Dunker, Moll. Jap. p. 223, pi. xvi. figs. 3 & 4, 
Japan. 
[ Lithodo)nus ] Lithophaga (Bolten, 1789). Dunker begins a monograph 
of this genus in Kiister’s Conch. Cab. pt. 316, pis. i.-iv., & pt. 318, 
pp. 1-8, describing 9 and figuring 28 spocios ; L. ventricosa , new name for 
malayana , Reeve, nec Philippi, p. 4, pi. i. figs. 3 & 4, Icebbeclceana and 
cavernosa, spp. nn., p. 7, pis. i. figs. 3 & 4, & ii. tigs. 5 & 6, Philippines. 
Modiolaria cuneata, sp. n., Fischer, J. de Conch, xxx. p. 53, Bay of 
Biscay, 1160 metres. 
Idas argenteus (Jeffr.), original description corrected ; it inhabits de- 
serted tubes of Teredo, between the Hebrides and Faroes : Jeffreys, 
P. Z. S. 1882, p. 683. Idas argenteus (Jeffr.) var. n. lamellosus, Verrill, 
Tr. Conn. Ac. v. p. 579, and P. U. S. Nat. Mus. v. p. 342, New England, 
335 fath. 
AviCULIDiE. 
Avicula hirundo (L.) var. nitida (Verrill), New England, 65-192 fath. ; 
Verrill, Tr. Conn. Ac. v. p. 582, pi. lviii. fig. 43. 
Avicula coturnix, brevialaia , loveni, and {M eleagrina') martensi , spp. nn., 
Dunker, Moll. Jap. pp. 228 & 229, pi. x. figs. 1-8, Japan. 
