FORAMINIFERA OF THE ATLANTIC OCEAN 



17 



Discorhina berihelotiana Goes, Kongl. Svensk. Vet. Akad. Handl., vol. 19, 

 No. 4. 1882, p. 107, pi. 8, figs. 266-268; vol. 25, No. 9, 1894, p. 93, pi. 15, 

 fig. 790; Bull. Mus. Comp. Zool., vol. 29, 1896, p. 69.— Kiaer, Rept. 

 Norwegian Fish, and Mar. Invest., vol. 1, No. 7, 1900, p. 45. 



Discorhina lurho, var. parisiensis, subvar. berihelotiana Parker and Jones> 

 Philos. Trans., vol. 155, 1865, p. 387, pi. 16, figs. 26, 27. 



Test plano-convex, oval, much compressed, scalelike, peripheral 

 margin acute, sometimes slightly carinated, dorsal surface nearly- 

 flat, ventral side somewhat convex; chamhers five to seven in the final 

 whorl, often somewhat carinate at the border; sutures slightly 

 depressed, distinct; wall smooth, finely perforate; aperture a narrow 

 slit at the inner margin of the chamber on the ventral side. 



Diameter, 0.40-0.80 mm. 



d'Orbigny originally described thi'5 species from the Canary Islands. 

 Theie are very many records from the region of the British Isles and 

 western Europe, and somic from many other regions, but as they are 

 not usuallj^ accompanied by figures, it is very difficult to know whether 

 or not they are identical Avith the Atlantic species. 



A copy of the type figure is given here. 



DISCORBIS BERTHELOTI (d'Orbigny), rar. FLORIDENSIS, new variety 



Plate 3, figures 3-5 



Test broad, especially in the adult, plano-convex, whole test very 

 strongly compressed, periphery keeled; chambers, four or five in the 

 final whorl, rapidly increasing in size in the adult, broad, extending 

 to nearly half of the periphery, on the ventral side with an angular 

 projection over the umbilical region; sutures very distinct, depressed, 

 slightly limbate; wall smooth, finely perforate, on the dorsal side 

 evenly perforate, on the ventral the inner portion of each chamber 

 clear and apparently without perforations; aperture low, elongate, at 

 the base of the last-formed chamber. 



Discorbis bertheloii, var. floridensis — Material examined 



Cat. I Collection 

 No. ' of - 



12883 

 12884 

 21191 

 12H85 

 21192 

 12886 

 21193 



21194 



12887 

 12888 

 21195 

 21196 

 12S;i9 

 21197 

 21198 



J.A.C. 

 J.A.C. 



U.S.N.M. 



J.A.C. 

 U.S.N.M. 



J.A.C. 



U.S.N.M. 



U.S.N.M. 

 J.A.C. 

 J.A.O. 



U..S.N.M. 



U.S N.M. 



J.A.C. 



U.S.N.M. 

 U.S.N.M. 



Num- 

 ber of 

 speci- 

 mens 



Locality 



Off Turtle Harbor, Fla... 



Off Ragged Kev, Fla 



Off Ragged Reef, Fla 



do 



do 



do 



OfT Government Cut, 

 Miami, Fla. 



Off Ajax Reef, Fla 



Off Miami, Fla 



Off Fowev, Fla 



do..-". --- 



do 



do 



.do. 

 .do. 



°^' turl 



Character of 

 bottom 



Abundance 



Rare. 



Do. 

 Few. 

 Rare. 



Do. 



Do. 



Do. 



Few. 

 Rare. 

 Few. 

 Common 



Do. 

 Rare. 



Do. 



Do. 



