ARCADE. 



343 



of Pectunculus. They are found mixed with Cardium, Venus, Razor- 

 fish, and Pectens. Their round and robust frame attracts much atten- 

 tion. They form the first of those charming infantile collections which 

 are gathered at the mother's feet. 



The animal which inhabits this pretty shell is moulded on its curva- 

 ture ; like the shell, it is round and squat ; it is furnished with a 

 mouth, large, and thick for its size, and with double branchiae. When 

 the animal is taken alive, it sometimes exudes a thick mucous liquid 

 over the shell, which has disgusted many a young collector with his 

 capture. , 



Among numerous species of Pectunculus we note as worthy of 

 representation : P. aureflua, Reeve (Fig. 153) ; P. delessertii, Reeve 

 (Fig. 154); P. pectiniformis, Lamarck (Fig. 155); and P. scriptus, 

 Born (Fig. 156). 



Fig. 155. Pectunculus pectiniformis 



(Lamarck). 



Fig. 156. Peciunculus scriptus 

 (Born). 



