104 FAMILIES AND GENERA. 



SePObiCUlariidSB (EULAMELLIBRANCHIATA.) Plate viii. 

 Scrobicularia, 99-103. 



SeyllJBidSB. (OPISTHOBRANCHIATA.) Plate xxxii. 



Scyllaa, 600. 



Skeneidse. (PROSOBRANCHIATA.) Plate xxiv. 

 Skenea, 434. 



Solenidse (EULAMELLIBRANCHIATA.) Plate xiii. 



Solecurtus, two cardinals in right valve, pallial scar with broad and 

 shallow fold, 149, 150. 



Ceratisolen, hinge strengthened by a rib diverging obliquely from 

 the beak in each valve towards the front margin, 151. 



Solen, pallial scar with a narrow sinus at the posterior extremity ; 

 one cardinal in the right valve, 152-155. 



Stenogyridse. (PULMONATA.) Plate xx. 

 Achatina, 312. 



Sueeineidse. (PULMONATA.) Plate xx. 

 Succinea, 3 I 3-3*7- 



Tellinidse. (EULAMELLIBRANCHIATA.) Plates vii., viii. 



Tellina, two cardinals in each valve, those in the left valve of 

 equal size, 90-97. 



Gastrana, two cardinals in each valve, those in the left valve of 

 unequal size, one being minute, 98. 



Teredinidse. (EULAMELLIBRANCHIATA.) Plate xiv. 

 Teredo, 166-171. 



Testaeellidae. (PULMONATA.) Plate xviii. 

 Testacella,, 230, 231. 



Tornatinidse. (OPISTHOBRANCHIATA.) Plate xxx. 

 Tornatiiius, 551-557. 



TroehidSB. (PROSOBRANCHIATA.) Plate xxii. 

 Trochus, 338-354. 



TriehOtropidSB (PROSOBRANCHIATA.) Plate xxiii. 



Trichotropis, shell conical, spire long, apex pointed, 380. 

 Torellia, shell globose, spire short, apex depressed, 381. 



