286 THE FOSSIL ECHINOIDEA 



Haime, and a number of detached spines were also met with in the same measures. 

 None of, these, however, find a counterpart in the Gaj collection — evidence, though 

 negative, which goes strongly against the assumption that these spines belong to 

 C. halaensis. Throughout the series the shaft is more or less inflated in the region of 

 the lower third, producing a subfusiform profile ; and the distal extremity appears to 

 have often been flaring and cup-shaped. The ornamentation is more or less spinulate, 

 and is nearly always larger and more strongly developed on one side of the shaft than 

 the other. Figs. 22 and 22a represent opposite sides of the same spine; Fig. 22 i a 

 portion magnified. In some cases the spinulate ornamentation appears to have been 

 almost monstrously developed, as in Fig. 19, and it would be hard to say, with any 

 degree of certainty, that this spine was properly placed in this series. It is also 

 doubtful whether Figs. 26 and 27 really belong to the same species as the rest of the 

 series ; in both, the inflation of the shaft is very slight, and in Fig. 26 the spinulate 

 ornamentation is smaller and more numerous than in any of the others. In Fig. 27 

 the ornamentation is disposed in longitudinal lines, and the thornlets composing it are 

 very erratic and irregular in their development. 



Fig. 24 does not belong to the so-called C. halaensis type. It is a fragment of 

 what was probably a straight cylindrical spine, with widely-flaring cup-formed 

 extremity (and figured on that account) ; its ornamentation is comparatively small, 

 rather widely spaced, and in longitudinal lines. The spines represented in Figs. 19-28 

 were all found at the base of a scarp four miles west of Trak Hill. Survey-number 

 G -^2-. Others, similar to some of them, at Sarochi, three miles north of Pokhan. 

 Survey-number G ^^. 



There is a small much broken fragment of a more echinulate spine than any of 

 those above noticed, which recalls the character of two of the spines we have previously 

 figured from the Miocene of Kachh (Tert. Echin. Kachh and Kattywar *, pi. viii, 

 figs, 11 and 14). In this example the ornamentation is sharply echinulate, confined 

 entirely to one side, and does not show any tendency to form transverse ridges. It was 

 found six miles east-north-east of Karachi. Survey-number G -j^. 



Fatnili/ ARBACIADM, Gray, 1855. 



Genus CCELOPLEUEUS, Agassiz, 1840, amended. 



The occurrence of species of the genus Cmlopleurus in the Tertiary deposits of 

 Sind was noticed by d'Archiac and Haime in their great work, and they described 

 three species. Of these, one had already been described by Klein, and renamed by 

 Agassiz Coslopleurus equis, and the others were new to science. The distinguished 

 authors of ' Les Animaux fossiles de ITnde ' considered that all their species of the 

 genus Coelopleurus came from the Nummulitic strata, but we find that only two of 

 them came from that horizon. One is a Miocene form, not only in Sind, but also in 



* Pal. Indica, Ser. XIV. (1883). 



