12 



99 Zirphaea crispata 



Circurnboreal; England, North Carolina, Straits of Puca to 

 San Diego, Cal., on the Pacific coast; Santo Domingo, Cal. 



Dall, W. H.: Notes on the anatomy of Pholas (Barnea) cos- 

 tata Linne, and Ziphaea crispata Linne. Phila. acad. pr 1889: 

 274-276. 



100 Solen rosaceus 



Length 6, width 1 cm, about 5 mm thick; very delicate, rose- 

 colored, with a polished horn-colored epidermis; shell straight, 

 abrupt at one end, rounded at the other. 



Santa Barbara, Cal., to La Paz, Baja Cal. Beautiful and 

 large specimens were found at Santo Domingo, Baja Cal., 7 cm 

 long. In San Diego bay I once found thousands of these beauti- 

 ful shells strewn along the shore; usually seems rather rare. 



101 Tagelus Californicus 



Santa Barbara, Cal., to Gulf of Cal. Abundant at Santo Do- 

 mingo, Baja Cal., specimens 12 cm long being found. 



102 Cryptomya Calif ornica 



Straits of Puca, not rare at San Diego, Cal., and dead speci- 

 mens found at Santo Domingo, Baja Cal. 



103 Clidiophora punctata 



Shell oblong and beaked, very flat and compressed, valves 

 thin, silvery white, within strongly punctate, about an inch long. 



Straits of Fuca to Gulf of Cal., low water to 3 fathoms; 

 Santo Domingo, Baja Cal., dead specimen. 



104 Semele decisa 



Santa Barbara, and San Diego, Cal., Santo Domingo, Baja 

 Cal., dead. 



Shell 8 cm in diameter and width, being nearly round, and 

 4 cm in thickness; outside coarsely wrinkled and light brown; 

 within white, beautifully tinged with rose purple, especially near 

 the margin. 



105 Lyonsia Californica 



Vancouver Island. Often washed ashore in great numbers on 

 the shore of San Diego bay; found abundant at Santo Domingo, 

 Baja Cal. 



106 Periploma argentaria 



San Pedro, Cal., to Gulf of Cal. Santo Domingo, Baja Cal., 

 dead. 



107 Sanguinolaria nuttallii 



Shell 5 by 7 cm, 2 thick; thin; epidermis dark brown especially 

 near the margin; shell white, showing rays of lilac beneath the 

 epidermis; hinge ligament just behind the beaks, is very promi- 

 nent. 



Santa Barbara, Cal.; Japan. Abundant at San Diego, Cal., and 

 at Santo Domingo, Baja Cal. 



108 Tellina rubescens 



Shell rather solid, 4.5 by 2.5 cm, about 1 thick; marked with 

 strong lines of growth; color inside and out a rather deep rose 

 purple and white. 



Santo Domingo, Baja Cal., living, to Cape San Lucas and 

 Panama. 



