OF KACHH AND KATTYWAR. 53 



lating ; the pairs of pores are separated by an elevated narrow ridge, and there is a 

 small tubercle close to the inner pore on the interporiferous area, and three smaller 

 ones (or one nearer the actinostome) towards the median line. The test is thin, and 

 the sutural markings are distinct on the inner surface. 



Locality. Arenaceous series of Kachh, near Warsar, north of Jakao. Survey- 

 numbers C 068, C 068 F. 



Several fragments which are united in a mass show that the test was high and 

 that the plates were numerous in vertical series. 



Illustration of the Species in Plate VIII. 

 Fig. 9. The plates : natural size (actinal end upwards). 



There are several well-marked spines in the collection from the Arenaceous series 

 of Kachh, some of which belong to species of Goniocidaris (Plate VIII, Figs. 11, 13, 14), 

 and show the depressed cup-like terminations, and others belong to other Cidaridae 

 (Figs. 10, 12). 



Family ABBACIABM. 

 Genus CCELOPLEURUS, Agassiz, 1840. 



1. CcELOPLEUEUS FoEBESi, d'ArcMac & Haime. Plate XII, Fig. 1. 



This species was described and figured by MM. d'Archiac and Haime from a 

 single specimen, which was much crushed and deformed {op. cit. p. 200, pi. xiii. fig. 6). 

 Enough remained, however, to form a good specific diagnosis. 



In the collection from Kachh there is a broken specimen showing the greater 

 part of the apical system and the upper part of an ambulacrum and interradium 

 tolerably perfect. 



We add therefore a description of these parts, which is more or less defective in 

 the work j ust quoted. 



The anal ring is irregularly pentagonal in outline and is slightly raised above the 

 ordinary test-level ; one angle is posterior. The five generative plates, which are large, 

 enter into the formation of the ring, and the five oculars do not, but they slope upwards 

 from the ambulacra to the suture between the nearest generative plates. 



The madreporic is the largest plate, and the others are broad at the edge of the 

 ring and unite with their fellows to the right and left by a short straight suture. The 

 plates are about as long as broad, and their free end is a wide angular projection, 

 which is at a lower level on the test than the end of the ocular plate on either side. 

 A re-entering curve is on either side, and reaches the straight suture. The generative 

 pore is large and circular, and is at about three fourths of the length of the plate from 

 the ring. Close to the edge of the ring there is a little bunch of small tubercles, about 

 four in number, and beyond it are one or two others ; one has the appearance of 



