OF WESTEKN SIND. 287 



Kachh and Kattywar. The second Nummulitic species is Coelopleurus Pratti, d'Archiac 

 and Haime, and the Miocene form is C, Forlesi, d'Archiac and Haime. 



We have noticed that the true horizon of the Ccelopleuri in Sind is not so low as 

 the true Nummulitic limestone ; but it is that of the Oligocene strata of the Nari series, 

 ■which contain a few species of Nummulites. No species has been found in the Khirthar 

 series or in the Eanikot beds, the first named containing the true Nummulitic limestone. 



Our descriptions of C. equis and C. Pratti will be found on referring to the 

 Fasciculus on the Nari Series or Oligocene of Sind *. 



In describing the Ccelofleuri of Kachh we redescribed C. Forhesi (page 53), and 

 we noticed that, as this species occurred in Kattywar, we should consider its details 

 more carefully in dealing with the fossils from that locality. But on investigating the 

 forms from that Miocene horizon, we found that there were points about them which 

 required much more study, and a probable alteration of the generic diagnosis. Hence 

 we did not give any further information, and we trust that this explanation will be 

 sufficient. 



The specimens of the genus Coelopleurus in the Miocene strata of the Gaj group 

 are numerous, and some are in a very fair condition of preservation. The forms vary 

 much in the different stages of growth, and yet those which, on a superficial view, 

 would be called C. Forhesi, d'Archiac and Haime, can be readily separated from the 

 others. They are larger and more tumid forms. 



Yet there is no doubt that if the specific diagnosis of C. Forhesi, as given in ' Les 

 Animaux fossiles de ITnde,' be depended upon, the forms cannot come under that 

 species. MM. d'Archiac and Haime were furnished with most wretched specimens, 

 in fact, with such as no modern palaeontologist would care to describe. Hence their 

 diagnosis is correct where they clearly saw details, and just as incorrect where they had 

 to assume. Whilst we retain the specific name of C. Forhesi, and still associate it 

 with the names of the distinguished French palaeontologists, it must be understood 

 that very few of their special characters remain and that the specific diagnosis is almost 

 entirely new. 



Our discovery of the nature of the ambulacral plates in relation to the tubercles, 

 and the development of the tubercles of the ambulacra, affects the old diagnosis con- 

 siderably. So does the presence of the perforations at the angles of the sutures of the 

 ambulacral median line, noticed in the recent forms by A. Agassiz, and the presence 

 of a tag on either side of the ambulacra, at the peristome. 



1. C(ELOPLEUEUS FoEBESi, d'ArcMuc & J. Haime, amended. Plate XLVI, Figs. 1, 2, 



4, 7, 9. 



The test is large and tumid, and rather high ; above the ambitus the slope is but 



slight to the apical disk, and this slope commences where the diameter of the test is 



greatest. From this part there is a gradual narrowing down to the surface upon which 



the test rests. Actinally the test is very slightly convex and tends to be flat, and the 



comparatively small peristome is in the midst of a decided concavity, or, in other words, 



* Pal. Indica, Ser. XIV. (1883), Tert. EcMn. of Kachh and Kattywar. 



