30 BULLETIN 104, UNITED STATES NATIONAL MUSEUM 



planorbis d'Orbigny" from the type locality of the Vienna Basin, 

 and it seems to be a true Asterigerina. It is moreover a rather low 

 spired, broadly spreading species as figured in the Vienna Basin paper 

 and in the topotype material. The high spired Recent form needs 

 further study. 



DISCORBIS POLYRAPHES (Reuss) (7) 



Under the name "Discorbina polyraphes" Heron- Allen and Earland 

 record a very small species from off the British Isles. Reuss's Creta- 

 ceous species with its rounded periphery and other characters seems 

 to belong elsewhere than in Discorbis. Figures of the Recent British 

 form are given by Heron- Allen and Earland. ^^ 



DISCORBIS (?) POLYSTOMELLOIDES (Parker and Jones) (?) 



Hofker records "Discorbina polystomelloides" from Holland, ^^ but 

 his figure indicates that the species from western Europe is an 

 Elphidium. The typical form figured by Brady and others from 

 the Indo-Pacific is probably not a Discorbis, but may be related to 

 Epistomella. 



DISCORBIS (?) PRAEGERI (Heron-AUen and Earland) 



Plate 6, iigures 4 a-c 



Discorbina praegeri Heron-Allen and Earland, Proc. Roy. Irish Acad., 

 vol. 31, pt. 64, 1913, p. 122, pi. 10, figs. 8-10; Trans. Zool. Soc. London, 

 vol. 20, 1915, p. 692; Trans. Linn. Soc. London, ser. 2, vol. 11, 1916, 

 p. 270; Journ. Roy. Micr. Soc, 1916, p. 50; Bull. Soc. Sci. Hist. Nat. 

 Corse, 1922, p. 134; British Antarctic Exped., Zool., vol. 6, 1922, p. 199; 

 Journ. Roy. Micr. Soc, 1930, p. 183. 



"Test free, trochoid and conical, composed of three to four con- 

 volutions, in a depressed spire, with five or six chambers in the last 

 convolution. Peripheral edge entire and usually somewhat thickened, 

 occasionally slightly carinate. Still more rarely the marginal edge 

 is lobulate, owing to the slight inflation of the segments. Sutures 

 flush on the superior face of the shell, somewhat depressed on the base 

 or inferior face, which is nearly flat, and furnished in the umbilical 

 region with a solid stud of shell-substance; breadth varies from 0.15 

 to 0.4 mm, 



"This is one of the innumerable types of D. rosacea; but as it does 

 not appear to have been specifically described, in spite of its very 

 distinctive appearance, we have thought it advisable to give it a 

 name. It is one of the most characteristic types of the Clare Island 

 area, and occurs in more or less abundance in nearly every dredging, 

 as also in many 'Goldseeker' dredgings and other British gatherings. 

 It can hardly be confused with any other type if examined from the 

 under-surface, the solid umbilical stud being a constant feature. 



'8 Proc. Roy. Irish Acad., vol. 31, pt. 64, 1913, pi. 12, flgs. 11-13. 



» Flora en Fauna der Zuiderzee, Protozoa, 1922, p. 150, flg. 47 (in text). 



