LAMELLIBRANCHIA. 
Moll 55 
GASTEOCHiENID^. 
Fistulana : 3 species figured by Sowerby, 1. c. 
Gastrochcena ; 29 species figured, id. 1. c. ; G. difficilis, St. Thomas, 
and gigantea (Desh., MS.), fig. 5, locality unknown, are apparently new. 
Gasterochaena [sic] tasmanica^ sp. n., J. E. T. Woods, P. R. Soc. Tasra. 
1876, p. 31, Tasmania. 
CoRBULIDiE. 
Poromya rotunda, sp. n., Jeffrej’^s, Ann. N. H. (4) xviii. p. 494, 
N. AtLantic, 1450 fathoms. 
Pecchiolia gibbosa and tornata, spp. nn., id. ibid., N. Atlantic, 
1460-1785 fathoms. 
Necera striata, exigua, notabilis, circinata, papyria, and angularis, 
spp. nn., id. ibid., N. Atlantic, 1450-1785 fathoms. 
Tellinid^. 
Psammobia circa, sp. n., Morch, J. de Conch, xxiv. p. 373, Tortola. 
Fischaria truncata, Mungo Creek, mouth of Camaroon River, and 
tiimida, Loango coast, spp. nn., Martens, MB. Ak. Berl. 1876, p. 271, 
pi. V. figs. 6-8, 9-11. 
PAPHIIDiE. 
Sem.ele warburioni, sp. n., J. E. T. Woods, P. R. Soc. Tasm. 1876, 
p. .30, Tasmania. 
Mactrid;k. 
Mactra targionii (Aradas & Benoit), probably = lisor (Desh.), Aradas 
& Benoit, Conch, viv. Sic., and Kobelt, JB. mal. Ges. iii. p. 281. 
Yenerid.e. 
Venus casina (L.) : on its varieties, see Monterosato, Poche note, &c., 
p. 10. 
Cliione stutchburii (Gray), from Bass’s Straits, J. E. T. Woods, 1. c. 
p. 31. . 
CYRENIDiE. 
Cyrena. 41 species figured by Sowerby in the continuation of Reeve’s 
Conch. Icon. pts. 3.30 & 331. C. minor (Prime, MS.), fig. 8, locality 
unknown, and calcdonica (Gassies, MS.), fig. 40, New Caledonia, are 
apparently new ; C. veneriformis, new name for Batissa fuscata (Prime), 
fig. 11. 
S. Clessin commences a monograph of this genus in Kuster’s new 
edition of Chemnitz, pt. 258 (vol. ix.), describing and figuring 13 known 
