Manchester Memoirs, Vol. Ixii. (191 7) 125 



will be seen that the specimens from the Cote des Basques differ 

 from the recent ones in having a sunken umbilicus in the centre 

 of the inferior surface of the test, and also in not being" so elon- 

 gated. In these particulars my specimens resemble a species 

 from Miocene strata described by Karrer under the name of 

 Pulvinulina erinacea*. Karrer's drawings show a rounded 

 shell which is nearly circular in plan and which has a spinous 

 superior surface with slightly depressed sutures. The inferior 

 surface is smooth and shows seven segments in the final whorl. 

 It seems to me to be quite possible that P. erinacea may 

 be a weak starved form of Brady's variety, and consequently 

 Karrer was the discoverer and first recorder of the form, and 

 the name he gave it would have the priority, though un- 

 doubtedly Brady's description and recognition of its true 

 position is the correct one. 



(The specimens appear to be identical with Karrer's P. erin- 

 acea (K. 1868 M.F.K.B., p. 187, pi. V, fig- 6.), a form which 

 appears to have sufficient distinctive features to justify its being 

 regarded as distinct from Brady's P. oblonga var. scabra.) 



316. Pulvinulina hauerii, (d'Orbigny.j 



Rotalina hauerii, dT)rbigny, 1846, Foram. Foss. Vienne, p. 151 



pi. VII, figs. 22-24. 

 Pulvinulina hauerii, Brady, 1884, Chall. Rep vol. IX, p. 690. 



pi. CVI, figs. 6-7. 



Frequent. Specimens typical but not large. 



317. Pulvinulina hauerii, var. crassa, nov. 

 Plate VII, fig. 6. 



This is a robust development of the type, and differs from 

 it in the following particulars. 



The test is rounded in contour, strongly built, the inferior 

 surface conical, the superior nearly flat, the oral aperture is 

 large and irregular and sometimes divided into two portions 

 by a transverse partition, the part of the whorl near the oral 

 aperture is marked with strong raised ridges or beads. The 

 sutures on the inferior side of the shell are limbate. This 

 variety is much larger than P. hauerii, and the shell wall is very 

 thick. It is not frequent, and has only been found in Gather- 

 ings which are remarkable for the larger size of other species, 

 so that its peculiar characteristics are undoubtedly due to a par- 

 ticularly favourable environment. Diameter of large specimen 

 1.75 mm., height, 1.35 mm. 



* Sitz. d.k. Akad. d.w. math, naturw, CI. LVIII, Bd i,Abth. 1868. 



