"^'iSi!^,i:t" ^MMm in the Uni.

172 MOLLUSCA.
Macoma sulcosa, sp. n., Conrad, Am. J. Conch, vi. p. 74, pi. 1. f. 3, Raritan
and Delaware Bay.
Strigilla producta, sp. n., Tryon, ibid. p. 24, pi. 1. f. 4, Jamaica.
Lucinopsis undata (Penn.) described and figured by L. Pfeiffer in the new
edition of Chemnitz, Veneracea, pp. 117-120, pi 31. figs. 4-8.
Lucinopsis (Lajonkaivia) elegans, sp. n., H. Adams, I. c. p. 6, pi. 1. f. 5, Red
Sea.
Donax. Dr. E. ROMER gives a very careful monograph of this
genus in the new edition of Martini and Chemnitz. Sixty-nine
species are described and figured, only two being new. They
are disposed in seven sections, which are carefully characterized.
A. Margin crenulate.
1. Hecuba, Schuni., type D. scortum, L.; 2. Chion, Scop., type D.
rugosus, L.; 3. Serrulu, Morch, type trunculus, L.; 4. Machcerodonax,
n., type D. scalpellum, Gray.
B. Margin entire.
5. Latona, Schuni., type D. cuneatus, L.; 6. Capsella, Gray, type D.
vinaccus (Gmel.) = complanatus, Mont.; 7. Heterodonax, Morch,
type D. bimaculatus (L., as Tellina).—New are D. sttiqua, sp. n.,
p. 54, pi. 9. figs. 15-17, D. Icpidus, sp. n., p. 96, pi. 17. figs. 7-9.
Localities unknown.
Hemidonax, new section of the genus Donax, proposed by Morch for a
shell hitherto placed in the genus Cavdium as C. donaciforme, Schroter, Mal.
Bl. 1870, p. 121.
Donax (Scvvula) pictus, sp. n., Tryon, Am. J. Conch, vi. p. 23, pi. 1. fig. 1,
locality unknown. (This is, according to Dr. Morch, the type of Hemidonax
mentioned above.)
Donax venusta, Poli, is a variety of trunculus, L., but distinct from the
English atlantica, Hidalgo, = anatina, Forbes & Hani, = vittata, Jeffreys, said
not to he = aiiatina, Lam. Weinkauff, Bull, mal Ital. iii. pp. 18, 19.
Scmele macandrece, sp. n., H. Adams, I. c. p. 6, pi. 1. f. 6, Red Sea.
Semelcjimoiiia, sp. n., Verrill, Am. J. Sc. xix. p. 217, La Paz, California.—
S.formosa (Sow.) described by the same, ibid. p. 218.
MACTRID^E.
Mactra (L.). An account of L. Spengler's monograph (1802) is given by
Morch, Mal. Bl. xvii. pp. 122-124.
VENERHLE.
L. PFEIFFER proceeds, in the continuation of Chemnitz, to give
a partial monograph of the family Veneridaj; the part under
consideration, section 59 of the whole work, contains the genera
Siim-tla, Dosinia, Cyclina, Lucinopsis, and parts of Cytherea.
Venus, and Tapes.
Dosinia eorculum, China Sea, nuculoidca,Indian Ocean, ccesicia, locality unknown,
cyclas Brazil, physema, Japan, and areolata, Australia, spp. nn., E.
Romer, Mal. Bl. xvii. pp. 1-9.