REPORT ON THE FORAMINIFERA. 
341 
Trochammina protects, Karrer (PL XL. figs. 1-3). 
Trochammina proteus (pars), Karrer, 1S66, Sitzungsb. d. k, Ak. Wiss. Wien. p. 494, pi. i. fig. 8. 
Test free, spiral, subdiscoidal ; consisting of a tube of somewhat irregular diameter, 
and more or less distinctly segmented, coiled on itself, the successive convolutions being 
nearly in the same plane. Aperture large, terminal, with thickened border. Diameter, 
2 -\jth inch (L25 mm.). 
Under the general name Trochammina proteus, Dr. Karrer has figured a, large and 
interesting series of fossil Troehamminmce, from the Older Vienna Sandstones. 1 That the 
specimens which form the subject of his illustrations are all varieties of a single type, will 
not be questioned by -anyone who has had the opportunity of examining similar series, 
whether recent or fossil, but several of the forms had previously received varietal names 
from Parker and Jones; for example, — figs, 1 , 2, 3 ( loc . cit..), may be referred to 
Trochammina .( Ammodiscus ) gordialis ; fig. 4 to Trochammina Ammodiscus ) cha~ 
roicles ; and fig. 6 to Trochammina squamcita. Fig. 8, however, of the same plate, 
does not accord in minor characters with any of the forms enumerated, but repre- 
sents a cliscoiclal, planospiral, distinctly-segmented test ; and I propose to retain Karrer s 
name in a restricted sense, associating it with these particular features. 
In the living condition such specimens are very rare, nevertheless the Challenger 
collections furnish examples from four localities, namely -off Culebra Island, West Indies, 
390 fathoms ; east coast of South America, off Pernambuco, G/'o fathoms; South Pacific, 
Low Archipelago, 2350 fathoms, and off Sydney, 410 fathoms. 
The fossil specimens already mentioned are from beds of Early Tertiary age in the Vienna 
Basin ; and Haeusler gives a figure of the same variety from the Jurassic formation of 
Canton Aargau, Switzerland. 2 
Trochammina conglohata, n. sp. (PI. XL. figs. 8, 9). 
Test convoluted, subglobular ; composed of an irregularly segmented tube, coiled 
upon itself in a constantly changing plane. Segments inflated, varying in size and con- 
tour. Aperture terminal, arched ; with thickened or everted margin. Surface smooth ; 
colour pale brown. Diameter about Lmh inch (1 "25 mm.). 
Little need be added to the foregoing description. The species is closely allied to 
Trochammina coronata, with which it is also associated in distribution ; the chambers are 
of similar size and shape, but in Trochammina conglohata they are irregularly combined., 
so as to form a rounded mass, instead of being coiled on one plane. 
1 TJeber das Auftreten von Foraminiferen in den -alieren Schicliten des Wiener Sandeteins. Sitzungsb, cl. h. Ak. 
Wise. Wien, 1866, vol. lii., pi. i. figs. 1-8. 
2 Ann. and Mag. Nat. Hist., 1882, ser. 5, vol. x., pi. iii. fig. 41. 
(ZOOL. CHALL. EXP. — PART XXII. 1883.) 
Y 44 
