68 Records of tlie Indian Museum. [Voi,, XIX, 



nection between the coecum and intestine, they closely resemble 

 the members of the fam. Psammobiidae to which the genera have 

 been referred by Dall (23) and Bloomer (16). For the present they 

 are considered to form the present subfamily, which will have to be 

 raised to a famil^^ when the animals will be further known to us. 

 They are undoubtedly more related to Psammobiidae than to the 

 other two subfamilies. 



The subfamil}^ may be diagnosed as follows: — 

 Animal. Bod}^ comparatively short, but deep and widened 

 out laterally. Pedal aperture extending along the entire ventral 

 margin or a portion of it, sometimes along a small portion of the 

 dorsal margin. United ventral margins of the mantle lobes short 

 and comparatively wide (from side to side). A cruciform muscle 

 in the ventral surface. vSiphonaltubes either completely separate 

 from each other or with a fused proximal portion. A large deep, 

 linguifoim foot generally protruding obliqueh^ forward and down- 

 ward from the pedal aperture. A siphonal space present or absent. 

 Retractor pedis anterior muscle not bifurcated, and directed 

 vertically upward. Labial palps comparatively short, generally 

 triangular. Anterior lip close behind the anterior adductor muscle. 

 Gills heterorhabdic, plicate, with the plicae free and flattened 

 out antero-posteriorh'. Intestine fused with the coecum and con- 

 sisting of a single limb (corresponding to the second limb of 

 vSoleninae). Viscero-parietal ganglia variously placed. 



Gen. Solecurtus, Blainville. 



1782-93. Solen (pars), L.inne, Sysf. Nat., ed. XII, p. 3225. 



1825. Solecurtus, Blainville, Man. Malac. Conch., p. 568. 



1826. Psamviobia, Risso, Hist. Nat. princip, prod, etc., IV, p. 375 ; 



Psammosoleii, Ibid.. V (Index). 

 1839. Soleiwcurtus, Sowerby, Man. Conch., p. 99. 

 18-I.2. Solenocurtns, id. ; 2nd edition, p. 262. 

 184.0. Solenocurtus, Swainson, Tr. Malac, p. 366. 

 1847. Cyrtosolen, Herrmannsen, Iiidicis Gen. Malac. prim., p. 468. 

 1858. Madia, Oken, Adams, Gen. Recent Moll., II, p. 346 ; III, pi. 



xciii, fig-s. 4, 4a, 46. 

 1874. Solecurtus, Reeve, Conch. Icon., XIX. 

 1887. Solecurtus, Blain\'ille, Fischer, Man, Conch, p. 1,107. 

 1889. Solecurtus, Blainville, Clessin, Martini-Chemnitz, Conch. Cab., 



XI (Solenacea), p. 84. 



The anatomy of three species of Solecurtus has been studied 

 by Bloomer (8, 11), viz. 5. strigillatus, L., S. candidus, and 5. 

 dombeyi, -Lam. The anatomy of the latter differs in so many 

 points from that of the other two, that it is necessary to separate 

 it and place in a distinct subgenus if not in a genus of its own. 



The following diagnosis is drawn from Bloomer's description : — 

 Animal. Body short and wide with the anterior margin 

 rounded. Pedal aperture extending ' above to the anterior end 

 of the anterior adductor muscle and below nearl}^ to the middle 

 of the ventral margin. A wide ventral surface. Cruciform muscle 

 t^^pical, shaped like a cross. Siphon with a fused proximal portion, 

 considerably wide and long and distally with separate anal and 



