Il6 GENERA AND SPECIES. 



Crepidula. (CAPULID^E.) Plate xxiii. 



384. fornicata, 2 in. x i in. smooth, pinkish white, with radiating 

 irregular chestnut lines often broken up 

 into spots. 



Crimora. (POLYCERIDJE.) Plate xxxiii. 



608. papillata, f in. a ridge of yellow papillae down each side of 



the back. 



Cyamium. (CARDITIDM.) Plate v. 



49. minutum, -fa in. x jV in. colour purplish brown, teeth tinged with 

 purple. 



Cyclostoma. (CYCLOSTOMATIDJ5.) Plate xxiii. 



397. elegans, fin. pale brown, with a purple tinge, whorls 



umbilicus twisted. 



Cyclostrema. (CYCLOSTREMATIDM.) Plate xxi. 



335. cutler ianum, 5 in. shell globular, umbilicus exposing only base 



of last whorl. 

 336 nitens, -fa in. shell sub-globose, umbilicus not exposing any 



part of the middle whorl. 



337. serpuloides, $ in. shell depressed, umbilicus exposing the 



whole of the spire. 



This genus was established by Captain Frederic Marryat, F.R.S., who did so much 

 in many ways, though most people know him only by his novels. 



Cylichna. (SCAPH AN BRIDGE.} Plate xxx. 



560. acwninata, $ in. shell fusiform. 



561. nitidula, j n . shell oblong and tapering at the end, smooth 



and iridescent. 



562. wribilicaia, in. shell oblong, spirally striated, creamy and 



opaque. 



563. cylindracea, f in. shell cylindrical, outer lip straight in the 



middle. 



564. alba, J in. shell cylindrical, outer lip curved. 



There is one variety of 562 conulus which is longer and conical in shape ; and of 563 

 there is a variety linearis which is shorter, with brown spiral lines at the ends. 



Cypraja. (CYPR&IDJE.) Plate xxv. 

 457. europaa, J in. shell roundish and longitudinally ribbed. 



Cyprina. (CYPRINIDM.) Plate v. 



53. islandica, 4^ in. X4in. shell thick, colour brown. 



