44 CLASS I. TROPIOPODA. ORDER I. B1MUSCULOSA. 



SOLECURTUS, De Blainville. 



Testa sequivalvis, ovato-oblonga, transversa, utroque latere hians, inter- 

 dura striis undulatis oblique et longitudinaliter tecta. Cardo den- 

 tibus plerumque duobus in valvis ambabus, non intersertis. Im- 

 pressio muscularis pallii profunde imbuta. 



The genus Solecurtus of De Blainville is one which we gladly adopt 

 in the distribution of Lamarck's Solenes, as it includes certain natural 

 and characteristic species that are neither referable to the genus Solen, 

 nor to any of the genera of the Nymphacea. 



Its shell may be described as equivalve, ovately-oblong, transverse, 

 gaping at both ends, and having the external surface sometimes covered 

 with fine undulated striae, crossing the valves obliquely and longitudinally. 

 There are two cardinal teeth in one valve, and one, rarely two, in the 

 other, but not interlocking as in the Solenes. The muscular impression 

 of the mantle is deeply marked. 



Examples. 



PI. XXVI. Fig. I. 

 Solecurtus Dombeii. 

 Solen Dombeii, Lamarck, Anim. sans vert., new edit., vol. vi. p. 58. 



Enc. Meth., pi. 224. f. 1. a,b,c. 

 Novaculina (Dombeii'?), Benson. 



PI. XXVI. Fig. 2. 

 Solecurtus acutidens. 

 Solen acutidens, Broderip and Sowerby, Zoological Journal, No. 15. 



p. 361. 

 Novaculina [acutidens?), Benson. 



