GASTROPODA — J3IVALVIA. 
MolL 85 
fig. 2 [shell, operculum, and radula, the last very incomplete], Prov. 
Hunan, China. 
Revoilia and Rochbrunnia, ? gg. un., incertas sedis, Bourguignat, Moll, 
terr. et fluv. de fomalis Medjourtins. [Not seen by the Recorder.] 
SOLENOCONCH^. 
Dentalium occidentale, Stimps. Jeffreys and others apply this name 
wrongly to D. striolatum ; the differences (P specific) are pointed out. 
Verrill, P. U. S. Nat. Mus. p. 394. 
Dentalium clathratum^ sp. n., Martens, SB. nat. Pr. 1881, p. 66, Moreton 
Bay, 550 fath. D.perlongumy sericatum, ceratum, sigsbeanum, and ophiodon, 
spp. nn., Yucatan Strait and West Florida; Dali, Bull. Mus. C. Z. ix. 
pp. 36-38. 
Siphonodentalium quadridentatum, sp. n., id. 1. c. p. 36, Atlantic, 7-30 fath. 
Cadulns pandionia, sp. n., Verrill & Smith, Am. J. Sci. (3) xx. [1880] 
p. 397, and P. U. S. Nat. Mus. iii. p. 395, N.E. Coast of America. C. 
mqualis^ watsoni, agassizi^ lunulus [!], cucurbitus [!], spp. nn., Dali, 1. c. 
pp. 34-36, Gulf of Mexico and Caribbean Sea, 229-805 fath. 
BIVALVIA. 
Pholadid.®. 
Teredo. On the preservation of timber against its attacks ; J. W. Put* 
man in the ‘ Scientific American,’ July 10th, 1880. 
Myidj;. 
Mya arenaria (L.) = hempTiilli (Newc.), in San Francisco Bay ; Stearns, 
Am. Nat. xv. p. 362 [swprd, Acclimatation]. 
CoRBULID.®. 
Corbula cymella, sp. n., Dali, Mus. Bull. C. Z. ix. pp. 114 & 115, Gordon 
Key, 68 fath., with notes on some well known Caribbean species. 
Nemra. Jeffreys, P. Z. S. 1881 [1882], pp. 936, 940, 943, arranges the 
species as follows : — 
A. Smooth, typical. 
B. .dwZaco^Aora, subg. n., striated concentrically. W. ZameZZosa (Sars), 
&c. 
C. Tropidophora^ subg. n. [pre-occupied in Cyclostomatidoi] keeled. 
N. abhreviata (Forbes). 
D. Spathophora, subg. n., ribbed lengthwise. N. costellata (Desh.), &c. 
Necera truncata, sulcifera, gracilis^ bicarinaia, teres., depressa, spp. nn., 
N. (^Aulacophora) contracta, semistrigosa^ ruginosa., inflaia, spp. nn., and 
circinata (Jeffr., 1876), N. {Tropidophora) angularis (Jeffr., 1876), N. 
(^Spathophora') curta and striata (Jeffr., 1876), Atlantic; id. 1. c. 
pp. 936-946, pi. Ixx. figs. 9-11, pi. Ixxi. figs. 1-11. 
