FORAMINIFERA OF THE ATLANTIC OCEAN. 57 



This form was described by Pearcey as follows: 



Test vase shaped, elongate, subcylindrical, erect, smooth and unetous to the touch, 

 more or less flexible in the living state, rounded at the base, gradually narromng 

 toward the superior extroniity, which is drawn out into a slender main tubular 

 chamber, somewhat dome shaped at its base. 



From about one-third of the tost ui)v\'ard a number of dichotomous tubular branches 

 extend at irregular intervals with graceful curves. Those branches open out into 

 the main chamber. The wall at the base of each outgrowth is thiclccr and somewhat 

 swollen, but after a sliort distance becomes more uniform in diameter. Walls of the 

 main chamber thick, composed of fine mud deposited on a slender chitinous envelope 

 extending to the terminal apertures of the branching tubes where it becomes quite 

 thin and consists of little more than a membrane, so thin and soft that it readily 

 collapses on drjdng. 



Color Vandyke brown. A few lilamentous outgrowths come off from the outer wall 

 of the extremity of the basal portion and appear in some cases to be tubular, but they 

 are so fragile that they break off with the slightest manipulation . It is probable that 

 these filaments serve to fix the test in an upright position in the deposit on the ocean 

 floor. 



Height of test, 1^2 inches (30-48 mm.) or more. 



Distribution. — Pearcey records this species from the west coast of 

 Scotland, 50-90 fathoms, sparingly in the deep water area of Loch 

 Fyne, 100-107 fathoms; off coast of Norwa}^ (Norman); and doubt- 

 ful specimens collected by the Triton in 640 fathoms in the Faroe 

 Channel. 



This is a most interesting species in many ways and is probably 

 widely distributed, as Pearcey also records it from the Antarctic in 

 deep water, 2,620 fathoms. 



Genus HIPPOCREPINA Parker, 1870. 



Hippocrepina Parker, in Dawson, Can. Nat., n. ser., vol. 5, 1870, p. 176 (type, 

 //. indivisa Parker). — H. B. Bhady, Rep. Voy. Challenger, Zoology, vol. 9, 

 1884, p. 324.— Rhumbler, Arch. Prot., vol. 3, 1903, p. 274. 



Description. — Test free, consisting of a single, elongate, somewhat 

 tapering, straight or slightly curved chamber, closed at the some- 

 what bluntly pointed proximal end, distal end broad and rounded, 

 walls comparatively thin, of fine sand grains with a reddish-brown 

 cement, grajash toward the distal end; aperture curved, narrow, or 

 irregular, sometimes with a raised lip. 



The genus seems to ])e rare but tlu^ records are rather widely 

 scattered, Heron-Allen and Earland having described a species from 

 the Kerimba Archipelago off the southwestern coast of Africa and 

 the type-specios known from the North Atlantic. 



HIPPOCREPINA INDIVISA Parker. 



Plate 23, figs. 3-7. 



Hippocrepina indivisa Parker, in Dawson, Can. Nat., n. ser., vol. 5, 1870, p. 176, 

 fig. 2.— Daw-son, Amer. Journ. Sci., ser. 3, vol. 1, 1871, p. 206, fig. 2; Ann. 

 Mag. Nat. Hist., ser. 4, vol. 7, 1871, p. 86, fig. 2.— H. B. Brady, Ann. Mag. 

 20173—18 C) 



