37 133 



Modiola lignea, Reeve. 



Modiula liynea, Rekve, Conchol. icon., X, Modiola, Sp. 58, pi. X, fig. 71. 



_ _ _ Martini u. Chemnitz, Conc-liyl. Cabin., VIII, 3 Abtli., p. 102, pi. 27, lig. 3. 



S. of Koh Chuen, 30 fathoms, shells (2). Koh Kahdat, 1—5 fathoms, sand (1). 



Long. 15 — 20 mm. 



Distribution:— Gulf of Aden (Shopland), Red Sea (Sturany). — Torres Strait 

 (Melvill & Standen), Australia (Clessin), Port Elizabeth (Sowerby). 



No locality was given for Reeve's original specimens in Cuming's collection; 

 the species has since been found on the coasts of Australia and South Africa. It 

 is also recorded from the West Indies, but this is undoubtedly due to erroneous 

 determination. W. H. Dall states, in the report on the Mollusca of the Blake 

 Expedition,' that he has specimens from the east and west coasts of Florida; and 

 elsewhere- he states that it occurs along the east coast of America from S. Caro- 

 lina to St. Thomas. I have in my collection, specimens from St. Thomas, collected 

 by A. H. Ruse, and determined by Morch as M. lignea, Reeve; but the most im- 

 portant distinguishing characters of this species — the well-marked and conspicuous 

 lines of growth on the front and hinder parts, while the middle is smooth — do 

 not occur at all in these specimens, which are perfectly smooth all over the valve; 

 nor, in Dall's description of the Mollusca of the Blake Expedition are these cha- 

 racters mentioned. The American specimens undoubtedly belong to another species. 



Modiola arcuatula, Hani. 



Modiola arcuatula, Hanley, Proc. Zool. Soc. London, XII, 1844, p. 16. 



— — — Reeve, Conchol. icon., X, Modiola, Sp. 27, figs. 27 and 45. 



— — — Martini u. Chemnitz, Conchyl. Cabin., VIII, 3 Abth., p. 101, pi. 30, figs. 8-9. 



— — — L. MoRLET, Journ. de Conchyl., vol. 37, 1889, p. 161. 



— — — P. Fischer, Catalogue d. Mollusques de I'lndo-Chine, p. 212. 



Siam (P. Fischer). Cambodge, at the exit of the river Kampong-Son (L. Morlet). 

 This species does not occur in the collections made by the Danish Expedition. 

 Distribution:— Singapore, Mergui Isis. — Cochin China, Japan, Philip- 

 pines, Java. 



Modiola glaberrima, Dunk. 



Vulsella glaberrima, Dunker, Proc. Zool. Soc. London, XXIV, 1856, p. 363, No. 16. 



Modiola — — Reeve, Conchol. icon., X, Modiola, Sp. 48. 



— — — Martini u. Chemnitz, ConchyL Cabin., VIII, 3 Abth., p. 99, pi. 27, figs. 7— 8. 



— — — Edg. a. Smith, Report on the Lamellibranchiata of the Challenger E.\ped., 



p. 275. 



NW. of Koh Chang, 10 fathoms, mud (-/a). S. of Koh Chuen, 30 fathoms, 

 shells (3). S. of Koh Samit, 20 fathoms, mud ('/a). Sound of Koh Chang, 3—5 



■ Report on the Mollusca. "Blake" E.xpedition, 1877-80, I, p. 236. Cambridge 1886. 

 - W. H. Dall, Catalogue of the shell-bearing marine Mollusks and Bracliiopods of the south-eastern 

 coast of the United States. Washington 1889, pp. 38-39. 



