66 THE TERTIAEY FOSSIL ECHINOIDEA 



Genus BREYNIA, Desor, 1847. 

 Large Urchins well characterized by the presence of peripetalous, internal, and 

 subanal fascicles. There are large tubercles with deep scrobicules limited by the 

 peripetalous fascicle, but not in the posterior interambulacrum. The internal fascicle 

 crosses the four petals, and their pores within its area differ from those without and 

 may disappear. 



1. Beetnia caeinata, d'Archiac Sf Haime. Plate X, Figs. 1-4. 



There are two specimens in the collection from Kachh which are sufficiently well 

 preserved to enable their identity with Breynia carinata, d'Archiac & Haime, to be 

 established*. Unfortunately the typical specimen in the collection of the Geological 

 Society of London does not show the correct position of the crossing of the internal 

 fasciole anteriorly. 



Messrs. Medlicott and Blanfordf give an excellent figure of the species, drawn 

 by Wynne and Fedden (diminished one half); and they indicate the correct shape of 

 the area within the internal fasciole, making it elongate, and also show for the first time 

 distinctly the minute pores of the lateral and posterior ambulacra within the internal 

 fasciole. These are clearly seen in the typical specimen in the Museum of the 

 Geological Society. 



In the specimens from Kachh the test is decidedly nipped-in behind the posterior 

 ambulacra. The number of large tubercles increases with the dimensions or growth 

 of the test, and the area within the internal fasciole is long, regularly arched in front, 

 and more angular behind. 



The pores of the lateral and posterior ambulacra are visible, and those of the odd 

 ambulacrum are continued to the crossing of the fasciole. The large pairs of pores of 

 the ambulacra are separated by costse which are beautifully granular. The large 

 tubercles stand up from the depths of their scrobicules, are conical, small at the top, 

 perforate and crenulate. The periproct is elongate transversely, and the more or less 

 cordiform subanal fasciole environs tubercles placed in very regular transverse and 

 oblique series separated by grooves, on which, near the fasciole, are the ambulacral pores. 



The peripetalous fasciole does not enter the space between the ambulacra, and 

 includes the great tubercles. 



Locality. Miocene series : near Bair (not found in place), and near Biitta, east of 

 lera. Survey-numbers C 046, C 067. 



Illustrations of the Species in Plate X. 

 Fig. 1. The test, abactinal view. 



2. The test, posterior view, showing subanal fasciole. 



3. Abactinal view of a large specimen. 



4. Apical system : magnified. 



* Op. cit. p. 216, tab. XT. 

 t Op. cit. plate xvi, fig. 9. 



