50 BULLETIN: MUSEUM OF COMPARATIVE ZOÖLOGY. 
C. ovoidea Br. (1879), 1884, Chall. Rep., IX. p. 496, Pl. LV. Figs. 12-23. 
C. ovoidea Gots, 1891, Arct. & Scand. Foramf., Sv. Vet. Ak. Hdl., XXV. 9, p. 53, 
Pl. IX. Figs. 512-516. 
In the tropical seas two forms of this species are often met with. One has 
a slender and nearly eylindrical shape (C. eylindroides Reuss); the other is 
inflated and usually stouter, sometimes reaching a length of 1.75 mm. 
Pacific. 695-1832 fathoms ; not scarce, 
Caribbean Sea. 1830 fathoms; rare. 
UVIGERINA Ores. 
U. pygmeea D'ORB. 
U. pygmea DORs., 1826, Tab. Méth., An. Se. Nat., VII. p. 269, Pl. XII Figs. 8, 9, 
Mod. 67. 
U. pygmea BR., 1884, Chall. Rep., IX. p. 575, Pl. LXXIV. Figs. 11-14. 
Shows often a tendency to become prickly, and the type form is scantily met 
with in the tropics. The costation is often very coarse and deep, particularly 
in specimens from the Pacific. 
Pacific. 995 fathoms; not scarce. 
Caribbean Sea. 278 fathoms. 
ALLIED Form :— 
U, aculeata D'ORB. 
U. aculeata D'ORB., 1846, Bass. tert. Vienne, p. 191, Pl. XI. Figs. 27, 28. 
U. aculeata Br., 1884, Chall. Rep., IX. p. 578, PI. LXXV. Figs. 1.2: 
? L. gracilis Reuss, 1851, Septar. Thon. Berlin, Zeitschr. deut. geol. Gesellsch., 
III. p. 77, Pl. V. Fig. 39. 
Often our form is more costate than aculeate, the spines usually being 
confined to the 2-4 last segments. D'Orbigny's figure exhibits a form 
with the young stage only ribbed, all other segments being spinous. It 
cannot reasonably be differentiated from U. asperula Ozsz. & Ruuss ; and 
U. Orbignyana Cz3z., 1847, For. Foss. Wien, Haid. Nat. Wiss., Abh. II. 
pp. 146, 147, Pl. XIII. Figs. 14-17, being intermediate forms between 
this variety and pygmea. 
Pacific. 759-1218 fathoms; not scarce. 
U. Auberiana p'Onn. 
U. Auberiana D'ORB., 1839, For. Cuba, p. 106, Pl. II. Figs. 28, 24. 
U. asperula var. Auberiana BR., 1884, Chall. Rep., IX. p. 579, PI. LXXV. Fig. 9. 
U. Auberiana Gots, 1894, Arct. & Scand. Foramf., Sv. Vet. Ak. Hdl., XXV. 9, p. 52, 
Pl. IX. Figs. 494, 495. 
Our form differs somewhat from d’Orbigny’s type, being more cylindric and 
slender. 
Pacific. 695-1218 fathoms. 
