134 MR F. GORDON PEARCEY ON 



Sub-family TROCHAMMININyE. 



Genus HAPLOPHRAGMOIDES, Cushman. 



Haplophragmoides (Haplophragmium} scitulum (H. B. Brady). 



This nautiloid form was obtained at Stations 291, 313, 416. and 417, but rare. 

 Recorded from both Atlantics and from the Pacific, ranging in depth from 66 to 

 2900 fathoms. 



Haplophragmoides (Trochammina) trullissatum (II. B. Brady). 



From Stations 300, 337, 416, and 420, rare. World-wide distribution, ranging in 

 depth from 570 to 3950 fathoms. 



Haplophragmoides (Haplophragmium} glomeratum (H. B. Brady). 

 This minute spiral form was obtained at Station 420 only (rare). A common 

 species in Arctic Seas and in all the ocean basins, ranging in depth from 23 to 

 2675 fathoms. 



Haplophragmoides (Haplophragmium) canariense (d'Orbigny). 

 At Station 337a only (rare). Cosmopolitan ; at depths of from 2 to 3950 fathoms. 



Haplophragmoides (Haplophragmium) rotulatum (H. B. Brady). 



This rare and exclusively deep-sea form was taken at Station 337a (few) and 

 Station 342 (rare). Previous records: North Atlantic, BRADY; Pacific, CDSHMAN. 



Haplophragmoides (Lituola) subglobosum (G. 0. Sars). 



At-Stations 300, 313, 416, 417, 418, 420, and 447, but nowhere common. Cosmo- 

 politan, and from quite shallow water down to 3950 fathoms. 



Haplophragmoides umbilicatum, sp. nov. (Plate II. figs. 8-10.) 



Test free ; roughly nautiloid ; piano-spiral; composed of three coils. Walls compara- 

 tively thin (unequally) ; deeply umbilicated on both sides ; very rough and robust 

 externally, almost smooth internally ; generally with a thin chitihous lining ; chambers 

 broad and arched ; peripheral margin roughly involute ; first and second coils often 

 exposed in the umbilical region. Six to seven chambers in the last-formed coil ; 

 aperture a crescentic slit at the base of the apertural face. Colour a light yellowish 

 brown. Diameter T ] r inch (2'L mm.) or less. 



This species is a coarse sandy form resembling in some respects Haplophragmoides 

 rotulatum, but is readily distinguished from that species by the character of its 

 chambers. These are larger, not so compactly built, and more coarsely arenaceous 

 (Plate II. fig. 10), also the last chamber is subspherical. 



(ROY. SOC. EDIN. TRANS., VOL. XL1X., 1008.) 



