76 THE TEETIAEY FOSSIL ECHINOIDEA 



The fourth species is Clypeaster depressus, Sowerby. This is not a Nummulitic 

 form, but it characterizes the Oligocene in Sind and the Miocene in Kachh. 



The others have not been found as yet in the Lower Tertiaries of Sind or of Kachh. 

 There are, however, three species oiClypeaster in this division of the Kachh Tertiaries; 

 they all have very open petals, and are depressed, yet well-sized forms. As a group 

 they recall, but are specifically distinct from, the series described by Laube from the 

 Vicentin, which includes Clypeast&r Michelini, C. scutum, and C regulus ("Vicenti- 

 nische Echinodermen," Denkschr. d. k.-k. Akad. d. Wissensch. Bd. 29, Taf. iii. 1868). 



A very fine specimen of an EcUnolampas is in this series, and although only 

 portions of the test are visible, its swollen, high, and long slope are evident. The 

 petals, were they on the same level as the test and slightly narrower, would correspond 

 with those oi EcUnolampas globulus, Laube, and especially with those figured by de 

 Loriol in his last work on Egyptian and Lybian Echini. Considering how variable a 

 species this is, and the general resemblance of the Kachh form to figured specimens, 

 we feel disposed not to diagnose a new species, but to ally our form with that of 

 Egypt and San Giovanni Ilarione. 



Mspatangus rostratus, d'Archiac, is found in the beds with Orbitoides, and the 

 remarks already made will apply to it ; it is the only species which passes from the 

 Nummulitic to the Oligocene in Kachh. 



Eemarks on the Species of EcUnoidea from the Miocene Series of Kachh. 



The Cidaris which is found in the Miocene series of Kachh is that Cidaris 

 Halaensis which was described by MM. d'Archiac and Haime from the Nummulitic 

 strata of the mythical Chaine de Hala. It is a well-marked species, and adds to the 

 number of the Tertiary Cidaridge, with not very depressed tests and moderately broad 

 and not narrow interporiferous areas, which are decorated with two or three minute 

 tubercles, one being larger than the others, on each interporiferous plate. The re- 

 semblance to European Tertiary species is slight ; and the species has only a generic 

 relationship with the recent Cidaris metularia, Blainv. The small secondary tubercles 

 on the slope of the coronal plates and beyond the larger ones of the scrobicular circle 

 are pointed and round in outline and have minute mamelons. The tubercle close 

 to the poriferous zone in the ambulacrum is about the size of the third grade of coronal 

 tubercles, and is therefore small for a secondary. A narrow sunken line, without orna- 

 mentation, is over the vertical sutures in the median interambulacra. Moreover there 

 are a few milaries, or one or two vertical series of three, between some of the larger 

 tubercles of the scrobicular circle, which are along the transverse suture between the 

 vertical series of coronal plates. This apparently unimportant ornamentation links the 

 species to one which will be noticed from the Miocene of Kattywar. 



There is nothing remarkable about the Goniocidaris except that it differs from 

 the recent species, yet has some points which link these last together. The spines 

 are moderately large, but it is interesting to know that they are smaller than those 

 belonging to a later deposit in the Persian Gulf. 



