BIVALVE MOLLUSCA. 353 
Species of the genus Lectunculus are abundant on the shores of 
the Mediterranean and along the Atlantic coast. If we take up at 
hazard a handful of shells on any part of the French coast, one-third 
will consist of Pectunculus. They are found mixed with species of 
the genera Cardium, Venus, Solen, and Pecten. Their round and 
robust frame attracts much attention. They form the first of those 
charming infantile collections which are gathered at our mother’s 
feet. 
The animal which inhabits this pretty shell is moulded on its 
Leia oo 
SSuZa es 
“4. 
a 
Fig. 154. —Pectunculus pecteniformis Fig. 155.—Pectunculus scripius 
(Lamarck). (Born). 
curvature ; like the shell, it is round and squat ; it is furnished with a 
mouth, large, and thick for its size, and with branchiz. 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. aurefiua, Reeve (Fig. 152); £. Delessertit, Reeve 
(Fig. 153); 2. pecteniformis, Lamarck (Fig. 154); and P. scriptus, 
Born (Fig. 155). 
