304 
THE YOYAGE OF H.M.S. CHALLENGER. 
Papua, 1070 fathoms; Station 168, east of New Zealand, 1100 fathoms; and Station 
238, in the deepest portion of the North Pacific, 3950 fathoms. 
Haplophragmium cassis, Parker, sp. (PI. XXXIII. figs. 17-19). 
' Lituola cassis, Parker, 1870 (in Dawson’s paper), Canad. Nat., N. S., vol. v. p. 177 ; p. 180, 
fig 3. 
Test free, spiral at the commencement, bilaterally symmetrical or nearly so ; elongate, 
arcuate, much compressed, outer margin thin and sharp. Initial (spiral) segments few 
and minute ; those subsequently formed projected in a curved line, broad, sub triangular, 
and obliquely set. Aperture simple, situated at the distal extremity of the final segment. 
Walls thin, texture coarsely arenaceous, firmly cemented ; colour brown. Length, j^th 
inch (L4 mm.). 
Haplophragmium cassis is an arenaceous isomorph of CristeUaria crepidula, and 
except for the relatively large dimensions of the former and the different structure of the 
walls, the descriptive characters of the one species might, with but little impropriety, be 
employed for the other. It was one of a number of interesting Foraminifera which were 
first obtained by Dr. G-. M. Dawson from the Gulf of St. Lawrence, and were figured 
in his memoir on the Rhizopod-fauna of that region, under names assigned to them by 
Prof. Parker. 
Haplophragmium cassis is an extremely rare species, peculiar to the shallow water of 
northern seas. Its distribution list comprises only three localities : — Gasp 6 Bay, mouth 
of the river St. Lawrence, 16 fathoms (Dawson) ; Lievely Harbour, Disco, Greenland, 
5 to 20 fathoms (Norman) ; and Deva Bay, Spitzbergen, lat. 77° 30' N., depth 7 fathoms 
(Robertson). 
For the figured specimens, which are from Gaspe Bay, I am indebted to my friend Dr. 
G. M. Dawson of Montreal. 
Haplophragmium foliaceum, H. B. Brady (PI. XXXIII. figs. 20-25). 
Haplophragmium foliaceum, Brady, 1881, Quart. Journ. Micr. SoL, vol. xxL, N. S., p. 50. 
Test crosier-shaped, complanate, very thin, flat on both sides ; consisting of numerous 
segments, the earlier ones forming two to three convolutions of a flat spire, the later ones 
arranged in a broad, straight, linear series. Segmentation distinct ; peripheral edge 
slightly constricted at the sutures ; septal lines arched. Aperture simple, terminal. 
Length, ^th inch (1-25 mm.). 
Haplophragmium foliaceum is one of the most beautiful modifications of the Lituoline 
type. The test is of elegant crosier-like form, and so thin that, mounted in Canada 
balsam, its structure is fully displayed when viewed as a transparent object. Somewhat 
