169 265 



Clessin, in his deficient Monograph of the genus Chama fin Martini u. Chem- 

 nitz's Conchyl. Cabin.), states that the species, described by Reeve under the name of 

 Ch. cristella, ditîcrs 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; Reeve's and Lamarck's forms are undoubtedly identical; 

 besides Reeve expressly says: "the example here figured has been satisfactorily 

 identified with Lamarck's original specimen in the collection of M. Delessert." 



Chatna 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 (Va). 



Long. 35 mm., alt. 30 mm. 



Distribution: — Torres Strait (Melvill & Standen), Port Molle, Queens- 

 land (Coppinger), Cape Upstart, New Holland (Jukes). 



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 cornuta, Chem- 

 nitz, has been taken at Koh Tulu. 



Chama cornuta, Chemnitz (var), Conchyl. Cabin., VII, 1784, pp.150 and 154, pi. 5'i, fig. 518. 



— — — Der Naturforscher, XX, 1784, p. 13, pi. 1, fig. 3. 



Lamarck' was correct in doubting whether Chemnitz'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, Hinds, Proc. Zool. Soc. London, XI. 1843, p. 55. 



— — — Zoology of the voyage of H. M. S. "Sulphur." Mollusca, p. 67, pi. 20, figs. 1- 



— — — Reeve, Conchol. icon., II, Corbula, Sp. 8. 



— — — Hanley, Catal. of recent biv. shells, p. 344, pi 12, fig. 29. 



— — — var., Edg. Smith, Lamellibranchiata of the Challenger Exped., p. 30. 



' Hist. nat. d. anim. s. vert., 2 éd., VI, p. 583. 



'^ Martini u. Chemnitz, Conchyl. Cabin., VIII, 5 Abth., p. 12. 



D K. I). Vidensk. Selsk. Ski-., 7. H.iîkke, naturvidensk. og mathem. Aid. V. .■!. 34 



