GOES: FORAMINIFERA. 43 
T. rugosa Reuss, var. 
Plate V. Figs. 4, 5. 
Plecanium rugosum Reuss, 1869, Oligocün v. Gaas, Wien. Ak. Sitz. Ber, LIX. 
p. 468, Pl. I. Fig. 3. 
T. rugosa Br., 1884, Chall. Rep., IX. p. 363, Pl. XLII. Figs. 23, 24. 
2 T. flabelliformis Gúmb., 1868, Nordalp. Eoeän, K. Bay. W. Ak., Abh. X. P. 649, 
Pl. II. Fig. 88. 
? T. Jonesi Bn., 1876, Carb. & Perm. For., Pal. Soc., XXX. p. 188, Pl. X. Figs. 20-22. 
? 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 T. carinata D'ORB. 
o^ o 
It has a gray clay color, The contours are like those of T. folium PARK. & 
o 
JONES. 
Caribbean Sea. 196-210 fathoms ; scarce. 
T. conica D'ORB. 
T. conica D'ORB., 1839, For. Cuba, p. 143, Pl. I. Figs. 19, 20. (Much compressed.) 
T. euneiformi$ var. conica W1LLIAMS., Rec. For. Gr. Brit., p. 75, Pl. VI. Figs. 160, 161. 
T. sagittula var. Goüs, 1882, Ret. Rhizop. Caribb. Sea, Sv. Vet. Ak. Hdl., XIX. 4, 
Pl. V. Figs. 150-158, 
T. trochus Van pen Brorck, 1876, For. Barbade, An. Soc. Belg. Micr., II. p. 182, 
Pl. III. Figs. 11, 12. 
T. conica, trochus (partly) Br., 1884, Chall. Rep., IX. p. 365, Plate XLIIL Figs. 18-19, 
Pl. CXIIL Fig. 1. 
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 (Gods), 
T. trochus p’Ors. 
T. trochus p’Orn., 1840, For. Craie bl. Paris, Mém. Soc. Géol. Fr., IV. p. 45, PL IV. 
Figs. 25, 26. 
T. trochus Goiis, 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. 
Tt 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 
