GOES: FORAMINIFERA. 33 
TROCHAMMINA Park. & Jones. 
T. ringens Brapy. 
T. ringens Br. (1879), 1884, Chall. Rep., IX. p. 343, Pl. XL. Figs. 17, 18. 
Of this form but a small quantity of specimens have been brought home from 
both sides of the Isthmus. 
Pacific. 1201 fathoms; very scarce. 
Caribbean Sea. 347-769 fathoms; scarce. 
T. pauciloculata Brapy. 
T. pauciloculata Br. (1879), 1884, Chall. Rep., IX. p. 844, Pl. XLI. Figs. 1,2. 
Very few samples met with. 
Pacific. 1201 fathoms; rare. 
T. galeata Brapy. 
T. galeata Bn. (1881), 1884, Chall. Rep., IX. p. 344, Pl. XL. Figs. 19-23. 
A single specimen only has been met with, 
Caribbean Sea. 169 fathoms. 
T. trullisata Brapy. 
T. trullisata Br. (1879), 1884, Chall. Rep., IX. p. 342, Pl. XL. Figs. 13-10 (14-16 a 
somewhat modified variety). 
Both larger and pygmy forms have been met with, but in small number only. 
It is very nearly allied to Cyclammina, its chief difference from that genus being 
in its smaller number of segments (7 or 8) and its nearly simple shell wall. 
Pacific. 978-1218 fathoms; rare. 
Caribbean Sea. 347-1635 fathoms; scarce. 
T. conglobata Brapy. 
T. conglobata Bn., 1884, Chall. Rep., IX. p. 341, Pl. XL. Figs. 8, 9. 
Is to be considered as a more mature form of the preceding. 
Caribbean Sea. 399-1345 fathoms ; rare. 
T. proteus Kann. 
T. proteus KAnn., 1866, Wiener Sandstein, Wiener Ak. Sitz. Ber., LIL, p. 404, Pl. T. 
Fig. 8. 
T. proteus, lituiformis, Bn. (1879), 1884, Chall. Rep., IX. pp. 341, 342, Pl. XL. Figs. 1-7. 
It has a tendeney to grow out in a more or less straight tube and becomes 
then = T. lituiformis BR., which cannot properly be ranked as distinct, nor 
under particular varietal denomination. 
Caribbean Sea, 382-1630 fathoms. 
VOL, XXIX. — NO. 1. 3 
