338 THE FOSSIL ECHINOIDEA 



2. EcHiNOLAMPiiS SPHEBOiDALis ■?, d'ArcMac. Plate LIIl, Figs. 15-19. 



The following is the diagnosis of this species given in the ' Description des Animaux 

 fossiles de I'lnde,' p. 210 :— 



Test oval, very inflated, slightly enlarged posteriorly near the posterior ambulacra. 

 Apex scarcely more elevated than the upper part of the odd posterior interradium ; its 

 distance from the anterior margin is two sevenths of the length of the test. Four 

 generative pores, large, especially the posterior pair. Ambulacral petals short, straight, 

 flush with the test or very slightly tumid, rather narrow, considerably contracted jiear 

 their extremity ; the anterior petal shorter and a little narrower than the others. 

 Poriferous zones narrow, considerably arched, the companion zones in a petal very 

 unequcal in length ; in the odd anterior ambulacrum the right poriferous zone is the 

 longer, in the postero-lateral ambulacra the anterior zone is nearly one third longer 

 than the posterior, and in the antero-lateral ambulacra the posterior zone is the longer. 

 Interradial areas a little unequal in the neighbourhood of the apex ; measured midway 

 between the extremities of the petals, the lateral areas are the broadest. Actinal 

 surface subplane ; peristome situated a little anterior to the centre, subtriangular, 

 bourrelets very slightly developed, phyllodes open. Periproct marginal, rather high. 

 Tubercles rather crowded and slightly unequal, those in the neighbourhood of the 

 peristome larger and more widely spaced. 



MM. d'Archiac and Haime remark that the different examples examined by 

 them varied only very little in their form. The largest specimen was more than 

 4 centim. in length; another measured 3'5 centim. in length, 3 centim. in breadth, and 

 2-5 centim. in height. The locality is given as " Chaine d'Hala (Sinde)." 



We have stated on a preceding page, when treating of the young forms of 

 E. Jacquemonti, the grounds upon which we have referred several small tests in the 

 Gaj collection to this species. Our specimens unfortunately are in a very bad state of 

 preservation, and do not enable us to add anything further to our previous remarks, or 

 to the description given above. We may, however, mention that the height and 

 general tumidity of the test, the convexity of the actinal surface, the small size of the 

 peristome, the absence of bourrelets, and the narrowness of the ambulacral petals are 

 especially striking. 



Dimensions. The largest example measures 32 miUim. in length, 285 millim. in 

 breadth, and 24-5 millim. in height. The smallest 20, 19, and 16 millim. in these 

 dimensions respectively. 



Localities. In the Gaj series of strata : — 



i. North of Babba band, five miles east of Kadeji. Survey-number G -^ 



ii. Four miles south-west of Beynir Hill. Survey-number G -^2-3-. 



iii. Scarp at Kupo-jo-lak, or pass on the M61 range, west of Shah-beg (same 

 locality as G ^). Survey-number G \^l. 



iv. Hills east of Thana Shah-beg. Survey-number G ^i-^. 



