OF WESTERN SIND. 18.S 



inner pores are round, and the outer pores pyriform, the pair being united by a well- 

 defined furrow ; and each pair separated from the neighbouring pair by a broad costal 

 ridge. The poriferous zones diminish only slightly in breadth towards the outer extre- 

 mity. The interporiferous area is lanceolate in outline, slightly narrower at the outer 

 extremity than across the middle of the petal, and converging rapidly towards the apical 

 disk. We are unfortunately unable to describe in detail the character of the floscelle, 

 as in one of our specimens that portion of the test is obscured by matrix, and in the 

 other is so greatly weather-worn that nothing but the general Cassidulid character 

 is discernible. The bourrelets do not appear to have been very prominent. 



The ornamentation of the abactinal area of the test consists of small primary 

 tubercles, sunken in small, uniform, rather widely spaced scrobicules, the intermediate 

 portion of the test being coalescent and comparatively broad, which gives a somewhat 

 coarse appearance to the ornamentation. On the actinal surface the scrobicules are very 

 large, and the tubercles are placed near the side of the cavity. In the neighbourhood 

 of the median longitudinal line there is much pitted structure and coalescence in place 

 of scrobicules. 



The peristome is slightly excentric in front ; unfortunately its form is indistin- 

 guishable in our specimens. 



The periproct is situated in a long, narrow, elliptical depression or slit, extending 

 from the upper extremity of the posterior declivity nearly down to the margin. In the 

 test below the periproct there is a slight trough or channel, which disappears on the 

 rounding of the margin. There is no hood or overhanging prominence above the peri- 

 proct, the test appearing as if slightly pinched together and angular there, and the 

 lateral margins of the periproct-slit are slightly impressed or bent inwards. 



Bemarks. This species is much more elliptical than the allied form, C. ellipticus, 

 from the Ranikot series, the test being more almond-shaped, more contracted anteriorly, 

 with the apical disk more excentric, and the character of the posterior rostration and of 

 the periproct also different. The forms are distinctly separate. 



Dimensions. 



millim. 



Length of the test 23 



Breadth of the test 17 



Height of the test 11 



A second specimen is of the same size, but somewhat crushed. 



Locality/. In the Khirthar series : — Baili, west of Tong. Survey-number ^^. 



Illustrations of the Species in Plate XXXIII. 



Fig. 17. Abactinal view of the test: natural size. 



18. Actinal view of the test : natural size. 



19. Longitudinal profile of the test: natural size. 



20. The test, seen from behind : natural size. 



2b2 



