THE FAMILY LITUOLID^ 149 



Genus Hippocreplna, Parkee. 



Test inonothalamous, elongate ; broad and rounded 

 at one end, tapering to a point at the other ; aperture 

 large, curved or irregular. Becent. 



Example. — H. indie isa, Parker (in Dawson's 

 paper), ' Canad. Nat.' N.S. vol. v. 1870, pp. 176, 180, 



This interesting little species is the only form in 

 the genus. It is recognised by its finely sandy tex- 

 ture, the thin test, and undivided interior. The root- 

 like test bears a somewhat crescentic or horseshoe- 

 shaped opening at the broad end, and surrounded by 

 a thickened rim. The species is entirely confined to 

 northern seas of high latitudes. It has been found at 

 the mouth of the Eiver St. Lawrence, 16-20 fathoms, 

 by Dr. G. M. Dawson ; off Greenland in 10 and 13 

 fathoms by Norman and Goes ; and at Novaya 

 Zemlaia, 10-15 fathoms, by Brady. Becent. (Plate 8, 

 figs. B, /..) 



Genus Hormosina, Brady. 



Test free, consisting sometimes of one chamber, 

 but more often of a series of chambers, which are 

 subglobular, fusiform, or pyriform, joined in a single 

 straight or arcuate series. Walls thin, smooth ex- 

 ternally ; texture finely arenaceous ; coloured vari- 

 ously yellow or brown. Becent. 



Example. — H. ovicula, Brady, ' Quart. Journ. 

 Micr. Sci.' vol. xix. N.S. 1879, p. 61, pi. iv. fig. 6. 



The test of this species consists of several fusiform 



