1920.] E. Ghosh : Anatomy of the Solenidae. 69 



branchial tubes with transverse ribbing. Large siphonal muscle. 

 A siphonal space bounded in front by the fusion of the proximal 

 portion of the siphon with the inner surface of the mantle lobes 

 someway anterior to their posterior margins. Anterior adductor 

 muscle narrow and elongated. Posterior adductor muscle narrow 

 and small. Foot ver}' large, wide and linguifoim. Fibres of the 

 retractor pedis anterior muscle passing to the pedal integument. 

 No protractor pedis muscle. Retractor pedis posterior muscle 

 ver}' small at its insertion. Labial palps narrow and triangular. 

 Anterior lip placed beneath the posterior portion of the anterior 

 adductor muscle. Gills narrow and elongated, extending into the 

 branchial siphon. Inner gills united dorsally in the cloacal region. 

 Well-developed branchial retractor muscles. Pyloric stomach not 

 produced posteriorly^ be3^ond the coecum. Coecum of the 

 crystalline st3de a long and wide tube extending in front to the 

 antero-dorsal end of the visceral mass in a curve. Intestine fused 

 with the coecum to the distal end of the latter. Posterior limb of 

 the intestine with a large number of irregular folds. Rectum 

 passing closel}^ round the posterior adductor muscle to end in the 

 anus after bending forward along the ventral aspect. Heart placed 

 at the anterior end of the pericardial chamber, A bulbous 

 arteriosus in the posterior aorta. Viscero-parietal ganglia placed 

 beneath the bifurcation of the retractor pedis posterior muscle. 



Subgen. Solecurtcllus, no v. 



iSiS. Solen Dunibeyi, Lamarck, Hist. Nat. Aiiiin. Sans. Vert., \' I , 



p. 58. 

 1S74. Solecnrtns Doinbeyi, Reeve, Conch. Icon., XI, fig. 30 a, b. 

 1889. Taf;eliis Doinbeyi, [,amarck, Clessin, Martini-Chemnitz, Conch. 



Cab., XI {Solenacea), p. 72. 



The present subgenus is erected for the reception of Sole- 

 curtus domheyi, Lamarck. The following diagnosis is drawn from 

 Bloomer's anatomical note: — 



Animal. Bod}' comparatively elongated and somewhat nar- 

 row. Pedal aperture occupying the anterior margin and nearly 

 the entire length of the ventral aspect of the body. Cruciform 

 muscle t3^pically cross-.shaped and placed at the posterior end of 

 the ventral surface close to the proximal end of the siphon. 

 Siphonal space as in Solecuytus. Siphon with a short jiroximal 

 portion and with separate anal and branchial tubes distalh'. 

 Anterior adductor muscle elongated and deep. Posterior adductor 

 muscle oral, of the same size as the anterior adductor muscle. 

 Foot as in Sclecurtus. Retractor pedis anterior fibres passing 

 inside the longitudinal nmscles. Retractor pedis posterior muscle 

 very small at its insertion. Coecum of the cr3^stalline style large and 

 passing forward along the ventral side of the visceral mass. 

 Posterior limb of the intestine forming a loose fold. 



