ae 
GOES: FORAMINIFERA, 43 
T. rugosa Reuss, var. 
Plate V. Figs. 4, 5. 
Plecanium rugosum Reuss, 1869, Oligociin vy. Gaas, Wien. Ak. Sitz. Ber., LIX. 
p. 453, Pl. I. Fig. 3. 
T. rugosa Br., 1884, Chall. Rep., IX. p. 363, Pl. XLII. Figs. 23, 24. 
27. flabelliformis Gims., 1868, Nordalp. Eocin, K. Bay. W. Ak., Abh. X. p. 649, 
Pl. IL. Fig. 83. 
27. Jonesi BR., 1876, Carb. & Perm. For., Pal. Soc., XXX. p. 133, Pl. X. Figs. 20-22. 
2 T. cuneiformis Jones, 1850, King’s Monogr. Perm. Foss., p. 18, Pl. VI. Fig. 6. 
Our form does not quite agree with the representations given by Reuss and 
Brady, for in their figures the prominent rib in the middle of the test is want- 
ing, making our form in this respect approach 7’. carinata D’ORB. 
It has a gray clay color, The contours are like those of 7. foliwm Park. & 
JONES. 
Caribbean Sea. 196-210 fathoms; scarce. 
T. conica D’Ors. 
T. conica D’OrB., 1839, For. Cuba, p. 143, Pl. I. Figs. 19,20. (Much compressed.) 
T. cuneiformis var. conica WI1LLIAMS., Rec. For. Gr. Brit., p. 75, Pl. VI. Figs. 160, 161. 
T. sagittula var. Gos, 1882, Ret. Rhizop. Caribb. Sea, Sv. Vet. Ak. Hdl., XIX. 4, 
Pl. V. Figs. 150-158. 
T. trochus VAN DEN Broeck, 1876, For. Barbade, An. Soc. Belg. Micr., II. p. 182, 
Ri ios a2: 
T. conica, trochus (partly) Br., 1884, Chall. Rep., [X. p. 865, Plate XLIIL. Figs. 18-19, 
Pl CXAiE Bigs. 
Sometimes more or less compressed, sometimes circular in transverse section ; 
the sutures often with a tendency to become limbate or “ jugate.”” Some more 
compressed forms are often difficult to distinguish from thicker forms of sagit- 
tula Derr. Large samples of the circular form have their segments sometimes 
scantily subdivided with a few secondary walls. 
Caribbean Sea. 300 fathoms (Goés). 
T. trochus p’Ors. 
T. trochus D’ORB., 1840, For. Craie bl. Paris, Mém. Soc. Géol. Fr., IV. p. 45, Pl. IV. 
Figs. 25, 26. 
T. trochus Gos, 1882, Ret. Rhizop. Caribb. Sea, Sv. Vet. Ak. Hdl., XIX. 4, p. 80, 
Pl. V. Figs. 167-170; Pl. VI. Figs. 171, 172. 
T. trochus (partly) Br., 1884, Chall. Rep., IX. p. 366, Pl. XLIV. Figs. 1-3. 
It may be with some degree of hesitation that our prominent Caribbean form 
with its labyrinthic segments is identified with d’Orbigny’s form, the inner 
structure of which is uncertain. In the younger and half-grown stages the 
