176 



probably C. impressa Deshayes ^), C. fallax Deshayes '-) and C. eximia Dunker ^) should also be 

 referred to this widespread and highly variable species. 



Distribution : — G. bengalensis has a wide range in the Indo-Pacific Région. 



In the "SiboCTa" collection there are four shells collected from the river of Maros. 



t>^ 



3. Geloina expansa (Mousson). 



1849. Cyrena expansa Mousson, Land, Sussw. Moll. Java, p. 89, pi. XIV. 



1854. Cyrena expansa Deshayes, Cat. Conch. Brit. Mus., II, p. 243. 



1857. Cyrena expansa Adams, H. & A., Gen. Rec. Moll., II, p. 446. 



1860. Cyrena expansa Reeve, Elem. Conch., II, p. 116. 



1870. Cyrena expansa Prime, Amer. Journ. Conch., V, p. 144. 



1877. Cyrena expansa Clessin in Martini-Chemn., Conch.-Cab. (N. F.), IX (3) Cycladeen, p. 105, 



pl. XV, fig. 5. 

 1890. Cyrena expansa Paetel, Cat. Conch. Samm., III, p. 98. 

 1897. Cyrena expansa von Martens in Weber's Ergebn. Reise Ost. Ind., IV, Siiss. Brackvv. 



Moll., p. 95. 

 1908. Cyrena expansa von Martens, Mittheil. Zool. Mus. Berlin, IV, p. 290. 



Von Martens has discussed this species in détail. Spécimens from différent localities 

 differ in regards to the shells being moderately tumid or somewhat compressed. The sculpture 

 is not well developed. 



Distribution : — G. expansa has so far been recorded from Java and Bornéo. 



In the "Siboga" collection there are tvvo shells of the species collected in the Anchorage 

 off Beo, Karakelang Islands (St. 131). 



Genus Batissa Gray. 



1853. Batissa Gray, Ann. Mag. Nat. Hist., (2) XI, p. 38. 



1854. Batissa Deshayes, Cat. Conch. Brit. Mus., II, Petricolidae, etc., p. 219. 



1897. Batissa von Martens, Weber's Zool. Ergebn. Reise Ost. Ind., IV, Sùss. Brackw. Moll., p. loi. 

 1903. Batissa Dali, Trans. Wagner Free Inst. Sci. Philadelphia, III, p. 1453. 

 192 1. Batissa Prashad, Rec. Ind. Mus., XXII, p. 145. 



The genus Batissa was proposed by Gray for Cyrenoid species with large, heavy ovate 



shells in which the nacreous layer is usually of a violet or salmon colour, and the latéral teeth 



are secrated. 



No génotype was designated by Gray, but he cited B. tenebrosa (Hinds) and B. oôesa (Hinds) 



as examples. Later authors hâve indiscriminately cited B. tenebrosa (Hinds) and B. violacea (Lamarck) 



as the génotype. 



I. Batissa violacea (Lam.). 



1797. Bruguière, Encyclopéd. Méthod., pl. CCCI, figs. \a, b. 



1806. Cyclas violacea Lamarck, Annal. Mus. d'Hist. Nat. Paris, VII, p. 421. 

 1818. Cyrena violacea Lamarck, Anim. sans Vertèb., V, p. 563. 

 1824. Cyrena violacea Dubois, Epitome, p. Ç>6. 



i) Deshayes, G. P. — Froc. Zool. Soc. London (volume for 1854), p. 18 (1855). 



2) id., ibid., p. 15 (1854). 



3) Dunker, ^V. — Zeitschr. Malakozool , IX, p. 51 (1852). 



