Plate 11 



Fig. 1. TeUina hodrc/ensis Hinds ; Tellen. Crescent City. Natural size. Exterior 

 left valve. 



Fig. 2. Metis aJta Conrad. San Pedro. Natural .size. Exterior right valve. 



Fig. 3. Macouia nasiita Conrad: Bent-nosed clam. Elkliorn Slough, Monterey 

 Bay. One and one-half times natural size. Exterior of right valve with 

 extended foot and siphons. The dorsal or exhalent siphon is nuuli the shorter. 



