169 265 
CLEssIN, in his deficient Monograph of the genus Chama (in Martini u. CHEM- 
nitz’s Conchyl. Cabin.), states that the species, described by REEvE under the name of 
Ch. cristella, differs from LAMARCK’s species, as LAMARCK’s diagnosis does not at all 
agree with REEvE’s form; therefore CLEssin gives REEVE’s species a new name 
(Reeveana, Clessin) and applies LAMarcK’s name to a West Indian species which 
does not at all agree with Lamarck’s diagnosis. The whole of this change is un- 
necessary and incorrect; RerEve’s and Lamarck’s forms are undoubtedly identical; 
besides REEVE expressly says: “the example here figured has been satisfactorily 
identified with LAmMARck’s original specimen in the collection of M. DELESSERT.” 
Chama pulchella, Reeve. 
Chama pulchella, Reeve, Conchol. icon., IV, 1846, Chama, Sp. 10. 
— — — Report Zoolog. Collect. Voyage “Alert,” 1884, p. 102, No. 35. 
Koh Mak, sandy coast (*/2). 
Long. 35 mm., alt. 30 mm. 
Distribution: — Torres Strait (MeLvirt & STANDEN), Port Molle, Queens- 
land (Coppincer), Cape Upstart, New Holland (JuKeEs). 
The exterior of the somewhat worn shell collected at Koh Mak is of a pretty 
pink colour. 
Note. A small, solitary valve, which somewhat recalls Chama cornula, Chem- 
nitz, has been taken at Koh Tulu. 
Chama cornuta, CHEMNITz (var.), Conchyl. Cabin., VII, 1784, pp. 150 and 154, pl. 52, fig. 518, 
—_— — = Der Naturforscher, XX, 1784, p. 13, pl. 1, fig. 3. 
Lamarck?! was correct in doubting whether CHEemnirz’s Ch. cornuta was identical 
with his Ch. florida from St. Domingo (therefore in the list of synonyms belonging 
to that species he has queried the citation). CLEssin,* however, in his Monograph 
of Chama has, as a matter of course, put CHEMNITz’s species as a synonym of 
C. florida, Lam., which is entirely wrong. CHEMNITz’s original specimen, which has 
been at my disposal, is from the Nicobars, and is a young individual which, because 
it has not been attached to any other object, has developed its umbones into a 
pair of twisted horns; as it is somewhat worn, it is not easy to form any definite 
opinion regarding this species. 
Fam. Myidae. 
Corbula (Aloidis) crassa, Hinds. 
Corbula crassa, Hinps, Proc. Zool. Soc. London, XI, ees p. 55. 
— = Zoology of the voyage of H. M.S. “Sulphur.” Mollusca, p. 67, pl. 20, figs. 1—3. 
= — — REEVE, Conchol. icon., II, Cornet Sp. 8. 
_— — —  Hantey, Catal. of recent biv. shells, p. 344, pl. 12, fig. 29. 
— — — var., Epg. Smirn, Lamellibranchiata of the Challenger Exped., p. 30. 
1 Hist. nat. d. anim. s. vert., 2 éd., VI, p. 583. 
* Martini u. CHEMNITZ, Conchyl. Cabin., VIII, 5 Abth., p. 12. 
D K. D. Vidensk. Selsk. Skr., 7. Reekke, naturvidensk. og mathem, Afd. V. 3. 34 
