FORAMINIFERA OF THE SCOTTISH NATIONAL ANTARCTIC EXPEDITION. 129 



(irnus WKBBINELLA, Rhumbler. 



Webbinella (Webbina) hemisphserica, Jones, Parker, and Brady. 



This simple little form was found, but very sparingly, in the washed material from 

 Station 420, attached to rock- fragments. Known from the English coasts, Faroe 

 Channel, and North- West Pacific, at depths varying from 25 to 630 fathoms. 



Genus CRITHIONINA, Goes. 

 Critliionina pisum, var. hispida, Flint. 



A fine specimen of this simple-celled variety, considerably larger than the type, was 

 found attached to a rock-fragment from Station 420. The chamber walls are built of 

 sponge spicules arranged perpendicularly in an amorphous siliceous cement, and lined 

 interiorly with a delicate chitinous membrane. 



CUSHMAN records this species from two stations in the North Pacific, 1259 and 

 1342 fathoms. 



It was taken by the Triton and Knight Errant Expeditions in the Faroe Channel, 

 570 to 640 fathoms, and recorded by me under the generic name of Sorosphsera sp., 

 with several others of a similar character. 



Genus THURAMMINA, H. B. Brady. 

 Thurammina papillata, H. B. Brady. 



Obtained (rarely) from Stations 291, 420, and 459. This species has a world-wide 

 distribution, but appears to prefer the deep waters of the great oceans, where it has 

 been found from depths of 540 to 3125 fathoms. 



Thurammina albicans, H. B. Brady. 



Two specimens of this rare species were found in the material from Station 342, in 

 a deposit of Globigerina ooze. Recorded by BRADY from Challenger Stations 323 and 

 246, off South America and in the North Pacific respectively, 1900 and 2050 fathoms. 



Thurammina, favosa, var. reticulata, var. nov. (Plate I. figs. 11-12.) 



Test free, consisting of a single chamber ; walls thin, composed of minute angular 

 mineral particles firmly compacted in a siliceous cement of a bright ferric-red colour ; 

 apertures, one or more, round, minute (non-papillate or tubular), situated at irregular 

 intervals over the surface of the test, and do not project beyond the exterior of the 

 chamber wall. 



The test is spherical or nearly so ; the exterior is marked by an irregular network 

 of raised ridges, which easily distinguish this form from the type T. favosa, Flint; 

 the ridges are robust and irregular, of a much lighter colour than that of the wall 



(ROY. SOC. EDIN. TRANS., VOL. XLIX., 1003.) 



