32 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 
H. agglutinans v’Ors. 
Spirolina agglutinans D’ORB., 1846, Bass. tert. Vienne, p. 187, Pl. VII. Figs. 10-12. 
H. agglutinans Br., 1884, Chall. Rep., IX. p. 301, Pl. XXXII. Figs. 19-26. 
HI, agglutinans Gos, 1893, Sv. Vet. Ak. Hdl., XXV. 9, p. 23, Pl. V. Figs. 140, 141. 
A few but well developed samples have been met with in the Caribbean Sea, 
at 778 fathoms. 
H. lituolinoideum, n. 
Plate Ill. Figs. 17-20. 
It would perhaps be consistent with a more philosophic view to range this 
form as a simplified variety of Zituola nautiloidea (LMcK.) D’ORB.,! from 
which it differs only in smaller size and undivided chambers. It measures 
only 2.5 mm. in length; although the labyrinthic construction is not at all 
developed, the aperture is still represented by numerous pores gathered mostly 
at the centre of the septum. The color is grayish with a flush in brown. 
Fig. 17, lateral; Fig. 18, marginal view; Fig. 19, the top with apertural 
poration; Fig. 20, transverse section of a chamber. 
Gulf of Mexico. 347-727 fathoms; rare. 
CYCLAMMINA (Brapy) Norman. 
C. cancellata Norman. 
C. cancellata (Br.) Norm., 1876, Vakorous Cruise, 1875, Proc. Roy. Soc., XXV. 
p. 214. 
C. cancellata Br., 1884, Chall. Rep., IX. p. 351, Pl. XX XVII. Figs. 8-16. 
Is met with in two forms, one more outspread and flat, with somewhat ex- 
tenuated margin; and another with rounded margin and relatively thicker 
growth; the former has generally thinner walls and a lighter color. 
Pacific. 660-995 fathoms; not scarce; the greater part are large and flat 
specimens. 
Caribbean Sea. 196-1830 fathoms; not so common; smaller, browner, and 
more round-edged form. 
ALLIED ForM:— 
C. pusilla Brapy. 
C. pusilla Br. (1881), 1884, Chall. Rep., IX. p. 853, Pl. XXX VII. Figs. 20-23. 
C. pusilla Gots, 1893, Arct. & Scand. Foramf., Sv. Vet. Ak. Hdl., XXV. 9, 
p. 32, Pl. VI. Figs. 242-244. 
Cannot be considered as specifically distinct from the type. 
Pacific. 772-1201 fathoms; scarce. 
Caribbean Sea. 382-1920 fathoms; not common. 
1 LZ. nautiloides p’OrRB., 1840, Mém. Soc. Géol. Fr. (1), IV. p. 29, Pl. IL Figs. 28-31. 
