30 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
ALLIED FoRM:— 
H. nitidum Goés. Plate III. Figs. 8, 9. 
Hi. latidorsatum var. nitidum Goiis, 1891, Arct. & Scand. Foramf., Sv. Vet. 
Ak. Hdl., XXV. 9, p. 21, Pl. V. Figs. 121-128. 
Smooth and glossy, usually narrow umbilicated; number of seg- 
ments, 4; color brown, reddish, or yellow; always only half the size of 
the type. 
Caribbean Sea. 530-1830 fathoms; not plenty. 
H. canariense p’Ors. 
Nonionina canariensis p’ORB., 1839, For. Canaries, p. 128, Pl. II. Figs. 33, 34. 
Hi. canariense Br., 1884, Chall. Rep., IX. p. 310, Pl. XXXYV. Figs. 1-5. 
H. canariense Goiis, 1893, Arct. & Scand. Foramf., Sv. Vet. Ak. Hdl., XXV. 9, p. 20, 
Pl. V. Figs. 92-101. 
Comparatively stout specimens of this form have been found from off Aca- 
pulco and at other stations. They are inflated and thick (H. crassimargo Norm.), 
the umbilical depressions often wide and deep; the segments of the last whorl 
usually 6 or 7, the sutures pretty deeply incised, and the surface smoother than 
in the North Atlantic form. 
Pacific. 660-1879 fathoms; in company with H. latidorsatum. 
H. globigeriniformis Park. & Jones. 
Lituola nautiloidea var. globigeriniformis Park. & Jones, 1865, North Atl. & Arct. Oc., 
Philos. Transact., LV. p. 407, Pl. XV. Figs. 46-47; Pl. XVII. Fig. 96. 
H. globigeriniformis Br., 1884, Chall. Rep., IX. p. 312, Pl. XXXV. Figs. 10, 11. 
H. globigeriniformis Goiis, 1863, Arct. & Scand. Foramf., Sv. Vet. Ak. Hdl., XXV. 
9, p. 22, Pl. V. Figs. 128-133. 
It is with a certain degree of hesitation that I assign a lot of more or less 
developed minor specimens to the above form of Parker and Jones, as they 
may be considered as poorly grown samples of H. helicoideum with only 3 or 4 
secments in the outer whorl; but in all other respects they agree with H. 
globigeriniformis. 
Pacific. 772-1218 fathoms; pygmy. 
Caribbean Sea. 382-966 fathoms; better developed. 
H. turbinatum Brapy var. helicoideum, n. 
Plate Ill. Figs. 10-13. 
This may rather be considered as a type form of Brady’s H. turbinatum (Chall. 
Rep., IX. p. 312, Pl. XXXV. Fig. 9), the chief difference being the regularly 
