OF WESTERN SIND. HI 



EemdrJcs. At first sight this species might be regarded as nearly related to the 

 Cid. Verneuili of d' A r c h i a c & H a i m e, as figured in the An. foss. de I'lnde. A careful 

 study of the description of that form and of the type preserved in the Museum of the 

 Geological Society at once dispels such an opinion ; indeed they appear to resemble 

 one another in little else than the great breadth of the miliary zone, the lineal arrange- 

 ment of the granulation borne upon it, and the absence of granulation between the 

 scrobicular ring and the poriferous zone. L. (C.) canaliculota difiers from C. Verneuili 

 in the greater height of the test, the total diff"erence of the contour of the profile, the 

 character and ornamentation of the ambulacra, the relative size of the peristome, and 

 the character of the ornamentation of the miliary zone. Furthermore it is especially 

 mentioned in the description of C. Verneuili, that the pairs of the ambulacral pores are 

 separated, by a granule, whilst in the form under notice they are widely spaced and 

 united by a furrow. The ornamentation of the miliary zone of C. Verneuili has simply 

 a single row of granules in each band, whilst two, three, or even more are the normal 

 number in our present form. 



Although the condition of preservation of the type in London leads to the 

 inference that the diagnosis must probably have been written from a more perfectly 

 preserved specimen, the conclusions as to tlie distinctness of L. (C.) canaliculata are in 

 no way invalidated. 



The above considerations were carefully balanced when describing the fossils of 

 the Eanikot series, and our retention of d'Archiac and Haime's name of Verneuili 

 for the Cidarid plates there found was dictated more by a wish to preserve the nomen- 

 clature of our learned predecessors and by a repugnance to add one single unnecessary 

 name to an already overburdened synonymy, than from any positive conviction that the 

 fragments in question were really identical with the badly preserved type at the 

 Geological Society. The condition of that specimen is so unsatisfactory that a definite 

 conclusion is impossible. 



Young Form. A small specimen, 10 millim. in diameter and 6 millim, in height, 

 obtained from the same beds as some of the typical examples of Leiocidaris canaliculata, 

 we refer provisionally to the same species. The test is undoubtedly that of an imma- 

 ture Cidarid, and does not present any characteristic specific features ; under such 

 circumstances it seems preferable to regard it as the young of the associated form 

 rather than that of an unknown species, which would require to be named from this 

 insufficient material. The interambulacral areas have only 4 or 5 plates in each 

 column, the primary tubercles are comparatively large and prominent, and the relative 

 breadth of the ambulacra is rather greater than in the fully grown form. The scro- 

 bicule occupies nearly the whole of the plate, and the miliaries of the scrobicular ring are 

 the only regularly defined granules present, excepting a few irregular and often elongate 

 granules standing external to them in the miliary zone at the ambitus. In the ambulacra 

 the pairs of pores are slightly oblique, being directed downwards and inwards towards 

 the median suture of the ai'ea ; the adoral margin of the plate is also directed slightly 

 inwards, and is thus at a little lower level than the next succeeding plate — a feature 

 giving the appearance of imbrication. In the interporiferous areas only the two outer 



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