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TERTIARY FAUNA OF FLORIDA 



Cumingia sinuosa A. Adams, P. Z. S., 1850, p. 25, pi. 8, fig. 6 (sinuata in legend to plate). 

 Cumingia tcnuis H. and A. Adams, Gen. Rec. Moll., ii., p. 412, 1854. 



Pliocene of the Caloosahatchie beds, Florida ; Dall. Recent from the 

 Florida Keys throughout the Antilles to the Bay of Caraccas, and probably 

 to northern Brazil. 



This form appears to grade into C. tellinoides, from some of the young 

 of which it cannot be distinguished by shell characters. It is also essentially 

 like the Pacific coast C. lainellosa Sby., with which Carpenter even united it. 

 C. lamellosa bears to C. calif arnica Conr. the same relation which C. coarctata 

 does to C. tellinoides. The fact remains, however, that, notwithstanding the 

 northern specimens of coarctata appear to merge into the southern type of 

 tellinoides, no specimens of typical tellinoides have been seen from the West 

 Indian region ; just as on the Pacific side no specimens of typical C. calif arnica 

 are known from the region east and south of Cape St. Lucas. The two forms 

 in each case are perhaps to be regarded as subspecies of a common descent, 

 modified by differences of temperature and food, or, as we formerly expressed 

 it, " geographical races." 



Cumingia californica Conrad. 



Cumingia californica Conrad, Journ. Acad. Nat. Sci. Phila., vii., p. 234, pi. 17, fig. 12, 1837. 

 Cumingia similis A. Adams, P. Z. S., 1850, p. 24, pi. viii., fig. 4; Sby. in Reeve, Conch. 



Icon. Cumingia, pi. 2, fig. 13, 1873. 



Pliocene of San Diego ( ?) ; Hemphill. Pleistocene of California at Santa 

 Barbara and San Diego. Recent from Crescent City, California, south to 

 Cape St. Lucas. Also received from Simoda, Japan, collected by W. Stimpson. 



Cumingia lamellosa Sowerby. 

 Cumingia lamellosa Sby., P. Z. S., 1833, p. 34. 

 Cumingia trigonularis Sby., P. Z. S., 1833, p. 34. 

 Cumingia coarctata Cpr., P. Z. S., 1863, p. 367 ; not of Sby. 



Pleistocene of Lower California, at Todos Santos Bay. Recent, from the 

 Gulf of California south to Payta, Peru. 



The other west coast species of Cumingia which are recognizable as such 

 are: C. mutica Sby. (1833, + C. grandis Desh. 1856, -f- C. ventricosa Sby., 

 1873), the largest species and type of the genus, from Chile and Peru; C. 

 Cleryi A. Adams (1850), a species said to be smooth and polished, from 

 Chile; and C. striata A. Adams (1850, + C. Adamsi Cpr., 1863), from Chile 

 to the Gulf of California, a small, arcuate species with fine, crowded sculp- 

 ture. 



