GASTROPODA 



549 



S. pugilis L. (Fig. 857). Length 9.5 cm.; color reddish-brown; 



spire acute, with protuberances; interior pink: Cape Hatteras to 



Panama, in shallow water. 



2. Pterocera Lamarck. Outer lip of shell 



with long finger-like processes: 10 species in 



Pacific and In- 

 dian Oceans. 

 ~ P.lambis(L.). 



Finger shell (Fig. 

 858). Length 15 

 cm. ; 6 fingers and 

 a finger-like si- 

 phonal canal 

 present: Indian 

 Ocean ; used as 

 ornaments. 



3. Aporrhais Dillwyn. Shell with a 

 tall spire; aperture large; lip very much 

 thickened and expanded, the outer lip 

 being widely dilated: 4 species, in tlie 

 North Atlantic. 



A. occidentalis Beck. Shell solid, 

 conical, with 9 whorls which have arched, 

 transverse ridges; outer lip dilated and 

 wdng-like ; color whitish ; length 6 cm. ; 



width 35 mm.: Cape Cod, northwards. 

 Fig. 858 — Pterocera lamhis • n n i xi u i 



(Rogers). occasionally lound on the beach. 



Fig. 8ii7 

 Stromhus pugilis (Rogers). 



Family 15. CYPE^IDAE. 



Shell solid, ovate, very smooth and polished, and often brightly 

 colored; spire often concealed by the last whorl, which is then as long 

 as the shell; aperture narrow and channeled at each end; no operculum; 

 foot broad; mantle expanded on each §ide and meeting over the back: 

 several hundred species, mostly in tropical and subtropical seas. 



1. Cypr-EA L. Cowries. Shell ovate, flattened 

 beneath, with the spire concealed; aperture toothed 

 on both sides; outer lip turned in: 200 species, 

 mostly in the Indian and Pacific Oceans, where the 

 beautiful shells are much used for ornaments. 



C. moneta L. (Fig. 859). True cowry. Shell yellow to white in 

 color; 3 em. long: Indian and Pacific Oceans; very common; used in 

 Africa and other places as money. 



Fig. 859 — Cyprcea 

 moneta (Rogers). 



