5o6 Records of the Indian Museum. [Vol. XXII, 



two cardinals, the anterior one being narrow, elongate, somewhat 

 triangular, and the posterior thick and tooth-like. The left valve 

 has a single lateral on each side ; of the two cardinals of this valve 

 the anterior is thick and blade-like, while the posterior is small and 

 reduced to a knob. 



The single tj^pe-shell measures 9-3 mm. in length by 7'4 mm 

 in maximum breadth, and is 4 mm. thick. It was collected in the 

 valley of the I^au Kling (stream near Brastagei in the Karo-Batak 

 High Plain). 



Family Solenidae. 

 Genus Cultellus, Schumacher. 



1887. Ciiltelltis, V. Martens, up. cit.. p. 263. 



1820. Cidtellits, Ghosh, Rec. Ind. Mtts. XIX, pp. (11. I12. 



Three subgenera Cultellus s.s., Pharella and Enisculus are 

 known from the Dutch East Indies, while specimens of the first 

 two have been recorded from Sumatra. In Mr. den Doop's collec- 

 tion only specimens of C. (P.) javanicus, a species previously re- 

 corded from Sumatra, are represented. 



Subgenus Pharella, Gray. 



1887. Pharella, v. Martens, op. cit., p. 266. 

 1820. Pharella. Ghosh, op. cit., p. 63. 



Von Martens redescribes this subgenus in the paper cited above 

 and Ghosh has given a fairly complete description of the gross 

 anatomy based on Bloomer's work.' He considers it with Bloomer 

 to be worthy of separate generic rank, but the small differences 

 in the gills of Pharella and Cultellus s.s. are not, in my opinion, 

 sufficient to separate the two into distinct genera. The shells 

 of the two are closely similar and it appears best, therefore, to 

 consider the two as subgenera rather than as distinct genera. 



Cultellus javanicus (Lam). 



l8t)7. Cultellus (Pharella) Javanicus, v. M.'irtens, op. cit., pp. 267- 

 269. 



Three specimens of this species collected in the mangrove- 

 swamps at Belawan (Deli) agree closely with von Martens' des- 

 cription and with the large series of this species from Penang and 

 other localities in the Malay Peninsula, preserved in the Indian 

 Museum collection. 



Family Pholadidae. 



Genus Teredo, Linn. 



Subgenus Furcella, Lam. 



Teredo arenaria (Linn.). 



1897. Teredo {Furcella) arenaria, v. .Martens, op. cit., pp. 284-286. 



A rather small and somewhat broken specimen is assigned 

 with some doubt, to this species. The shape and texture is quite 



1 Journ. Malacol. X pp. 114-121 (1903). 



