GOES: FORAMINIFERA. 55 
2. C. vortex Ficut. & Mott. 
Nautilus vortex Ficut. & Mott., 1803, Test. Micr., p. 83, Pl. II. Figs. d-i. 
C. vortex, orbicularis, Br., Chall. Rep., LX. pp. 548, Pl. LXIX. Figs. 14-17. 
Differs from the type only by its narrower and more bent chambers. 
Robul. orbicularis, imperatoria, and Soldanii D’ORB., cannot reasonably 
be differentiated from this form. 
Caribbean Sea. 130 fathoms ; scarce. 
C. gibba p’Orz. 
C. spectabilis Reuss, Deutsch. Septarienthon, Wien. Ak. Dkschr., XXV., p. 141, 
Pl. III. Figs. 9, 10. 
C. gibba D'OrB., 1839, For. Cuba, p. 40, Pl. VII. Figs. 20, 21. 
C. galeata Ruuss, 1851, Septar. Thon. Berlin (partly), Zeitschr. deut. geol. Ge- 
sellsch., p. 66, Pl. IV. Fig. 20. 
C. gibba Br., 1884, Chall. Rep., IX. p. 546, Pl. LXIX. Figs. 8, 9. 
C. gibba Gos, 1894, Sv. Vet. Ak. Hdl., XXV. 9, p. 61, Pl. X. Figs. 587-592 (alata 
passing into C. nitida p’ORB.). 
The more oval form of C. rotulata, with the last segment somewhat produced, 
seems to bea link between the type and C. crepidula Ficut. & Mouu. It is 
sometimes more flattened and has often received new names. 
Pacific. 1132 fathoms ; scarce. 
Caribbean Sea. 210 fathoms; scarce. 
C. cassis var. marginata D’OrB. 
Plate V. Figs. 13, 14. 
It is by no means easy to give a natural and true systematic review of all the 
lineate, papillate, or beaded, and at the same time of the cultrate and rowelled 
forms of Cristellaria, the beads and their distribution over the shell surface, 
and of the lines yielding such fickle characteristics that they cannot prove as 
satisfactory for a specific or subspecific determination. According to the differ- 
ent authors a scheme for such a review should assume this appearance :— 
I. Neither lineolate nor costate forms : 
A. No beads: = C. calear Lin. (partly), Nautil. calear Ficut. & Mott, 
1803, var. a, 0, x, w, Pl. XI. Figs. a-c, Pl. XII. Figs. 2, &, Pl. XITI. Figs. 
c,d, h, i; Rob. calear D’ORB., 1846, Bass. tert. Vienne, p. 99, Pl. IV. Figs. 
18-20 ; Rob. aculeata, radiata, pulchella, rosacea, rotunda, levigata D’ORB., 
1826, Tab. Méth., An. Sc. Nat., VII. pp. 288-290. 
B. Beaded. 
a. Sutures and sometimes the centrum beaded : Naut. calcar var. y, 6, 
Ficut. & Mott., 1803, Pl. XI. Figs. g-k, Pl. XIII. Figs. a,b; Naut. 
papillosus, F. & M., 1803, Pl. XIV. Figs. a-c; Brapy, 1884, Chall. 
Rep., IX. p. 553, Pl. LXX. Fig. 16; Crist. papillosa FORNASINI, 1894, 
For. Marne Messinesi, Mem. R. Acc. Sc. Istituto Bologna (5.), IV. Pl. 
III. Figs. 29-32 ; Rob. gutticostata GiimB., 1868, Nordalp. Hocin, K. 
