94 Mr. H. J. Carter on Ramulina parasitica. 



smaller than it is above. The head and collar pale yellowish 

 white; the thorax, tegulge, and the base of the abdomen 

 silvery white ; the abdomen yellowish white, darker at the 

 anus and on the underside ; the legs and antennae pale fawn- 

 colour. Expanse 2 inches. 



Hah. Ecuador, Sarayacu {Buckle^/) ; Zamora, September 

 {in coll. Mons. P. Dognin). 



This very beautiful species is quite distinct from any 

 known to me. 



XII. — Ramulina parasitica, a new Species of Fossil Fora- 



minifera infesting Orbitolites Mantelli, var. Theobaldi, 



with Comparative Observations on the Process of Ueprodac- 



tion in the Mycetozoa^ Freshwater Rhizopodajand Foramini- 



fera. By H. J. Carter, F.R.S. &c. 



[Plate VIU.] 



Ramulina parasitica J n. sp. (fossil). 



Test tliin, calcareous. Consisting individually of a single 

 chamber (PI. VIII. iig. 2, a), which is stoloniferous, and 

 collectively (fig. I,//, and fig. 2) of the same, forming a reti- 

 culated structure in which the chambers are united to each 

 other by the stolons (fig. 2, b). Chamber or lobe varying in 

 shape from globularity to any kind of multiangulate figure, 

 which may be produced by a variable number of stolons 

 draffffinsr out its convex surface in different directions into 

 angular forms, so as m the aggregate to effect a reticulated 

 structure in which the chambers are represented by the knots 

 and the stolons by the interuniting cords of the net (fig. 1, 

 ff). Chambers or lobes varying in size under 1- 360th inch 

 in diameter ; stolons cylindrical, about 1-1 800th inch in dia- 

 meter, varying in length with the distance between the cham- 

 bers which they connect. The projecting angles of neigh- 

 bouring chambers often uniting directly, so that two or more 

 become continuous without the intervention of stolons (fig. 

 1,^, and fig. 2, e e). Some are dark brown and others calc- 

 white (what the brown colour arises from I am unable to 

 say). Externally furnished (chiefly on the convex side or 

 that opposite the stolons) with a number of delicate, straight, 

 hair-like tubuli about 2-6000ths inch long and almost of 

 immeasurable thinness (fig. 2, ccc)^ each of which projects 



