CHAMA, CARDIUM AND VENUS 



81 



shells, which are marked by fine internal teeth 

 around the edges. Farther to the south there are 

 many other species. 



Venus Kennicottii^ Dall, Kennicott's Venus, is a 

 very rare shell which has been found at Neah Bay, 

 Washington, and off the coast of central California. 

 It is finely and closely lamellose over the whole sur- 

 face. It somewhat resembles the common Venus 

 mercenaria of the Atlantic coast. Its length is two 



and a half inches. 



Fig. 55 (*) 



Figure 55 represents a fine, large shell, taken alive 

 at Sitka. A worn valve was found many years ago 

 at Carmel Bay, near Monterey. Its name is Marcia 

 kennerleyi^ Rve., Kennerley's Marcia. It is nearly 

 three inches in length, and is grayish white in color. 



Marcia suhdiaphana^ Cpr., the Translucent Mar- 

 cia, lives in Alaskan waters, and also, in tolerably 

 deep water, as far south as the Santa Barbara Chan- 

 nel. The shell is thin, white, with an olive-gray 

 epidermis, and reaches a length of over two inches. 

 It was described by Carpenter under the name 

 Cle?nentia. 



