138 GENERA AND SPECIES. 



411. parva, % in. spire short, point blunt, spiral striae not 



punctured, suture narrow, no umbilicus. 



412. inconspicua, fa in. spire short and acute, spiral strias not 



punctured, tip of the spire pink, suture 

 shallow, umbilicus small. 



414. membranacea, J in. spiral striae not punctured, tip of spire not 



pink, suture narrow, umbilicus small or 

 absent. 



Runcina. (RUNCINIDM.} 

 582. hancocki, ^ in 



Plate xxx. 



colour black, with buff ends; eyes large, 

 surrounded by a pale ring. 



Saxicava. (GLYCIMERIDM.) Plate xiv. 



156. norvegica, 3 in. x 2 in. shell oval, hinge line straight. 



157. rugosa, if in. x f in. shell oblong, hinge line curved. 



Scalaria. (SCALARIID&.) Plate xxli. 



360. turtona, i J in. yellowish brown, ribs flat. 



361. communis, i in. cream, ridges raised. 



362. trevelyana, i in. fawn, ridges narrow, flat and white. 



363. dathratula, f in. white, ribs thin. 



364. pseudoscalaris, i in. cream, ridges raised sharply, basal keel. 



Scaphander. (SCAPHANDRID^.) Plate xxx. 



558. lignarius, 2jin. x i^in. shell striated. 



559. libranus, f in. x J in. shell with fine spiral, distinctly punctured 



grooves. 



Scissurella. (PLEUROTOMARIID^E.) Plate xxi. 



334. crlspata, fa in. whorls 4, flattened above, slit in margin of 



outer lip. 



Scrobicularia. (SCROBICULARIID&.} Plate viii. 

 103. piperata, 2 in. x ij in. no lateral teeth. 



99. pnsmatica, fin. x fin. muscular scars irregular and indistinct, 

 shell oblong. 



100. nitida, f in. x in. muscular scars oval and distinct, shell oval. 



101. alba, | in. x ^ in. inner edge toothed, shell oval. 



102. tenms, f in. x J in. inner edge bevelled and sharp, shell 



triangular. 



Scyllsea. (SCYLLJEID&.) Plate xxxii. 

 600. pelagica, 



in. cream and transparent, height greater than 

 breadth. 



