216 Zoological Society. 



Upper muscular scar oblong, broad, lower edge arched ; lower 

 scars 2, rather smaller, nearly similar in size, rather close together 

 but separate, the hinder one rather lower than the other. 



Hah. Peru ; Tambaz ; dredged from five fathoms in soft mud. 

 Mus. Cuming, No. 9. 



11. Anomia larbas. 



Shell white, smooth, lower valve pale green. 

 Upper muscular scar large ; lower scars 2, nearly as large as, and 

 close to, the upper one, nearly equal, and nearly in a line. 

 Hab. Coast of Peru, Payta. Mus. Cuming. 



12. Anomia alectus. 



Irregular, upper valves convex, reddish, internally pearly ; lower 

 valve green, internally green. 



Upper scar large, oblong ; lower scars 2, large, rather smaller than 

 the upper one, close together, but not confluent ; the lowest one the 

 largest. 



Hab. Peru, Bay of Guayaquil ; Hinds. Mus. Brit., and Mus. Cu- 

 ming, No. 7. 



13. Anomia hamillus. 



Reddish, thin, sinuous. Dorsal valve with a triangiilar, white, 

 porcellanous disk. 



Upper scar large, roundish ; lower scars 2, separate, close together, 

 nearly equal-sized, small, and nearly on the same line. 



Hab. West Columbia, Bay of Canes. Mus. Cuming, No. 6. 



14. Anomia lampe. 



Shell yellowish green, radiately costated ; internally green. 



Upper muscular scar large, squareish ; lower two rather smaller, 

 subequal, near together and to the upper scar, and nearly on the same 

 line ; sinus in lower valve very large. 



Hab. California ; Lady Katherine Wigram, Mus. Brit. Mus. Cu- 

 ming ; three specimens. 



15. Anomia TENUisTRiATA. 



Shell very variable in shape, regularly radiately striated ; sinus of 

 lower valve very large, ovate. 



Dorsal valve with three nearly equal muscular scars very close to- 

 gether ; the two lower small, placed close together side by side, just 

 on the lower margin of the upper scar, the hinder one being rather 

 behind the hinder edge of the upper one. 



Ostrea anomialis, Lamk. Hist. A. s. V. vi. 220. 



Anomia Ephippium, Defrance, Diet. Sci. Nat. ii. 



Anomia striatula, Desk. Coq. Foss. Paris, t. 6.5. f. 7, 11. 



Anomia tenuistriata, Desk. Coq. Foss. Paris, i. 377, in Lamk. 

 Hist. vii. 



Fossil, Grignon. 



The very characteristic scars of the dorsal valve are well shown in 

 M. Deshayes' plate above referred to, but not mentioned in the de- 

 scription. 



