102 CARELIA. 



not a carinated shell, and the surface was perhaps smoother 

 than in K. kauaiensis. The immediate ancestor of Carelia, 

 in other words, was probably a Kauaia-like shell with angu- 

 lated base, smooth whorls and had a twisted columella with a 

 small perforation. This form, if in existence now, would 

 probably be placed between Cyclamastra and Kauaia on ac- 

 count of its columella and aperture, or be classified as a 

 primitive form of Kauaia itself" (Hyatt}. 



The amastroid stage of Carelia is shown in pi. 16, fig. 7, 

 representing the neanic stage of C. bicolor. 



* 



Key to Species of Carelia. 



a. Later whorls angular or subangular at the shoulder ; per- 

 iphery flattened, base obtusely angular. 



&. Diameter nearly half the length ; no spiral striation ; 

 25x12 mm. with 6% whorls. C. &. angulata, no. 10 /. 

 & 1 . Longer, more slender, whorls 7 to 9. 



c. Last whorl very dark and smooth, strongly bi- 

 angular, with a creamy zone above the angle; 

 diam. one-third the length, or more. 



C. cumingiana, no. 9. 



c 1 . Last whorls biangular, the upper angle rounded, 



striate, lower angle strong; red-brown with a 



sutural light line ; diam. less than one-third the 



length, 47x14 mm. C. rigida, no. 8. 



c 2 . Lower angle rounded, upper acute or weak; 



usually a broad white zone below suture ; shell 



long, slender. C. dolei, no. 7. 



a 1 . Whorls not angular at the shoulder. 



&. Later whorls having more or less coarse spiral stri- 

 ation. 



c. Length usually less than 40 mm. ; red-brown 

 with a white band below suture; strong, un- 

 equal spiral cords. C. cochlea, no. 6. 

 c 1 . Similar but with well-rounded last whorl and 

 few, very weak spirals. C. bicolor, no. 10. 

 c 2 . Larger shells, length 45 to 80 mm., with dark 

 base and lighter color above. 



C. turricula, no. 1 ; C. paradoxa, no. 2. 



