THK ANNALS '^''^ 



MAGAZINK OF NATURAL HISTORY. 



[FOURTH si: I! I IX J 

 No. 29. MAY 1870. 



XXXIII. — On tiro new Species of the Foraininiferoii.'i Oeniis 

 Squainulina ; and on a neiv Species of D'ifi\ngia. Rv II.. T. 

 Carter, F.R.S. &c. 



[Plates 1 V. Sc v.] 



The genus SijuamuUnn, according: to Dr. (yarpciitev, was in- 

 stituted by Prof. Schultze ((Jober den Oroanisnius der Polytha- 

 lamien, &c., 1854) for " a minute Monothalamion of which he 

 found several specimens at Ancona, adhering to the surftice of 

 Algse and to the sides of a glass vessel in which sea-water 

 had been long kept. The shell, whose largest diameter is 

 about l-300tli of an inch, has the form of an irregular jjlano- 

 convex lens, being usually Hat, or nearly so, on its attached 

 side (which accommodates itself to the surface whereon it 

 grows) and convex on its free side, on some part of which, 

 usually about halfway between the centre and the peri])herv, 

 is a wide orifice from which the pseudopodia issue. The shell 

 is calcareous and opaque, and is destitute of pores ; its adhe- 

 rent layer is very thin, and is with ditficulty detached from 

 the surface to which it is attached. The substance of the ani- 

 mal is of a brownish-yellow colour, as in Gromia ; its pseudo- 

 podia, however, seem fewer and less disposed to subdivide 

 and inosculate." (Carpenter, ' Introduction to the Studv of 

 the Foraminifera,' Ray Soc. Pub., p. 67, pi. 1. fig. 22; also 

 Pritchard, 'Infusoria,' p. .5.58, ed. 1861.) 



Two arenaceous forms of this genus live in the laminarian 

 zone at Budleigh-Salterton, as their presence on certain fuci 

 cast upon the beach during storms indicates : — one like Squa- 

 multna Irevis, the type species of 8chultze's genus just de- 

 scribed ; the other, also discoidal, but bearing a little, erect, 

 brush-like eminence on its convexity. 



For the former I would suggest the specific name varians, 

 and for the latter sropn/o. from the resemblance of the emi- 

 nence to a little brusli or broom. 



Ann. d: Ma<^. X, Jlist. Ser. 4. To/, v. 22 



