Foraminifera and Ostracoda. 115 



Cytherina suldeltoidea, Miinst. sp., Ronier, 1838, Jalirb. fur Min. etc., 



p. 517, pi. vi, fig. 16. 

 Reuss, 1845, Verstein. bohm. Kreideform., pt. i, p. 36, pi. v, fig. 38 ; 



pt. ii, p. 104. 

 Bnirdia subdeltoidea, Miinst. sp., Rupert Jones, 1889 (1890), Mon. 



Cret. Entom., Suppl. (Pal. Soc.), p. 5, pi. ii, figs. 31-34. 



Examples of the above species in the Need's Camp washings exactly 

 compare with the types figured from the Cretaceous of England and 

 "North Germany. One of the species shows a deep sinus on the ventral 

 side of the valves similar to that figured by Rupert Jones (loc. cit. 

 1890) on pi. ii, fig. 34. 



B. subdeltoidea is also met with in Tertiary strata in Europe, and 

 a near relative is the living B. foveolata, G. S. Brady,* from Australia, 

 the West Indies, Crete, Serpho, Hongkong Harbour, Admiralty 

 Islands, etc. 



BAIRDIA SUBDELTOIDEA., Minister sp. var. AEQTJALIS, var. nov. 

 (Plate XV, figs. 17 a, &.) 



Description. This variety is distinguished from the type form in its 

 more ovate shape, as seen from the side of the valve ; the anterior part 

 being less broadly rounded and the posterior extremity less prolonged. 

 It thus comes nearer to B. amygdaloides, G. S. Brady.f a Miocene to 

 Recent species. 



BAIRDIA AFRICANA, sp. nov. 

 (Plate XV, figs. 19a-c.) 



Description. Carapace ovoid or pear-shaped, moderately tumid. 

 Valves seen from the side highest above the middle, anteriorly trun- 

 cately rounded towards the dorsal margin ; posteriorly tapering and 

 sub-acuminate ; ventral border widely curved and with a steep face. 

 Edge view of carapace subovate and with a steep face, thickest about 

 the middle. End view subcordate. Surface smooth or faintly pitted. 



Dimensions. Length, '702 mm. ; height, '439 mm. ; thickness of 

 carapace, '358 mm. 



The nearest form to the above is the before-mentioned B. amyg- 

 daloides, G. S. Brady, but which differs from B. africana in having a 

 more salient dorsal border. 



* B. foveolata, G. S. Brady, Les Fonds de la Mer, vol. i, 1867, p. 56, pi. vii, 

 figs. 4-6. Id., Kep. Chall. Zool. vol. i, pt. iii, Ostracoda, 1880, p. 55, pi. viii, 

 figs. 8a-f, and figs. 2a-f. 



t Hep. Ghall. torn, cit., p. 54, pi. ix, figs. oa-/ ; pi. x, figs. 2a-c. 



