M. M. SCHEPMAN, LAND- AND FRESHWATER MOLLUSCA ETC. 173 



Suborder Hygrophila. 

 Fam. LlMNAEIDAE. 

 I Si dora Ehrenberg. 

 1. Isidora moluccensis Lesson. 



Lesson. Voyage Coquille. Zool. Vol. II, p. 332. 

 Tapp. Canefri. Fauna Mal. New Guinea, p. 245. 



New Guinea. Sabang, Pandanus-marsh, July 15, 1907. 

 I owe the identification of this spécimen, which is not quite intact, to the kindness of 

 Mr. DAUTZEXBERG ; as LESSON has not figured his species, this may account for the very 

 différent views of subséquent authors. 



Order PROSOBRANCHIA. 

 Suborder Pectinibranchia. 

 Fam. Melaniidae. 

 Melania Lamarck. • 



1. Melania (Stenomelania) punctata Lamarck. 



Lamarck. An. s. vert., Ed. II, Vol. VIII, p. 430. 



Brot. Martini-Chemn. Conch. Cab., Ed. II, Melania, p. 168, PL 20, fig. 4. 



v. Martens. Sùss- u. Brackw.-Moll., p. 49, PI. 3, fig. 14, 15, (laevigata). 



P. & F. Sarasin. Sûssw.-Moll. von Celebes, p. 41, PL 4, fig. 45, PL 5, fig. 77, PL 8, fig. 10S. 



Timor. Koinini River, Aug. 21, 1909. 



BROT has (1. c. p. 172) made the suggestion, that M. laevigata Lam. should be merely 

 a variety of M. punctata, P. & F. SARASIN are of the same opinion. The much incrusted 

 spécimens are quite identical with those I enumerated from Timor and which Brot had 

 named for me as doubtless punctata. (Notes Leyden Muséum, Vol. XIV, p. 155), V. MARTENS 

 (1. c. p. 50) says this is probably his laevigata Lam. I think I must follow the opinion of 

 Brot, the brilliant worker in the genus. 



2. Melania [Stenomelania) moesta Hinds. 



Hinds. Ann. Mag. Nat. Hist., XIV, 1844, p. 9. 



Brot. Martini-Chemn. Conch Cab., Ed. II, Melania, p. 180, PL 21, fig. 6. 



Tapp. Canefri. Fauna Mal. New Guinea, p. 27. 



New Guinea. Sabang, Pandanus-marsh, July 15, 1907. 

 The spécimens agrée sufficiently with such ones formerly named by Brot. 



3. Melania (Stenomelania) sobria Lea, var. coclilidium Lea. 



Lea. Proc. Zool. Soc. Lond. 1850, p. 183 (cochlidium). 



Brot. Martini-Chemn. Conch. Cab., Ed. II, Melania, p. 179, PL 21, fig. 50. 



Tapp. Canefri.' Fauna Mal. New Guinea, p. 33. 



New Guinea. Alkmaar, Oct. 6, 1909. 



Two very bad spécimens agrée sufficiently with those in better state of préservation. 



