FORAMINIFERA OF THE ATLANTIC OCEAN 93 



Cyclophthalmidium tenuissima Lister, in Lankester, A Treatise on Zoology, 

 pt. 1, fasc. 2, 1903, p. 110 (footnote). 



This species has been excellently figured in the Monographs of 

 Carpenter, by Brady and by Flint. It occurs in fairly deep water 

 of the North Atlantic and apparently in the Mediterranean. The 

 development is very interesting and shows the relationship of the 

 genus to Ojphthdlmidium. Its resemblance to Orhitolites is only super- 

 ficial and the structure of the tw^o is very different. 



I have some young stages kindly sent me by Earland from off the 

 British Isles, and there are complete specimens in the Albatross col- 

 lection from the North Atlantic studied by Flint. 



The Pavonina italica figured by Costa '^ evidently is a Discospirinia, 

 but whether the same species or not it is very difficult to say without 

 seeing the actual type specimens, the figures like most of those of 

 Costa's being poorly drawn when details are needed. 



Genus PLANISPIRINA Seguenza, 1880 



Planispirina Seguenza (Genotj'pe, by designation, Planispirina communia 

 Seguenza), Atti R. Accad. Lincei, ser. 3, vol. 6, 1880, p. 310. — H. B. 

 Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 193 (in part). — 

 Chapman, The Foraminifera, 1902, p. 98.— Cushman, Special Publ. No. 



I, Cushman Lab. Foram. Res., 1928, p. 166. 



Test in the early stages like Cornuspira, later divided into cham- 

 bers, several to a coil; aperture simple, without a tooth. 

 Cretaceous to Recent. 



PLANISPIRINA CLIARENSIS Heron-Allen and Earland 



Planispirina cliarensis Heron-Allen and Earland, Proc. Roy. Irish Acad., 

 vol. 31, pt. 64, 1913, p. 35, pi. 2, figs. 7, 8; British Antarctic Exped., 

 Zool., vol. 6, 1922, p. 73. 

 "Test minute, compressed, highly polished, with two chambers 

 visible on the inferior surface and three or four on the superior or 

 oral surface. Periphery acute, and, in young specimens, carinate. 

 Aperture a large, edentate, circular or ear-shaped opening at the 

 termination of the final chamber, opening laterally upon the flat sur- 

 face of the test, surrounded in most instances by an everted and 

 rounded lip. The earliest chamber is an unseptate spiral coil. 

 "Length, 0.15-0.25 mm.; breadth, 0.12-0.18 mm." 

 This small species was described from the Clare Island region of 

 Ireland where it occurs in some numbers. The authors also record 

 it from the Antarctic. 



PLANISPIRINA AURICULATA Egger 



Plate 22, Figure 3 



Planispirina auriculata Egger, Abh. kon. bay. Akad. Wiss. Mlinchen, CI. 



II, vol. 18, 1893, p. 245, pl. 3, figs. 13-15.— Her on-Allen and Earland , 



«3(Atti Accad. Pont., vol. 7, 1856, p. 178, pl. 16, figs. 26-28.) 



