84 THE TERTIAEY FOSSIL ECHINOIDEA 



only. These we have figured on Plate XIII, Figs. 15 & 16 ; and it will be noticed that 

 it is the largest tubercles which are creiiulated. We do not therefore feel disposed to 

 depart from our determination that these forms are true TemnecMni. 



It is satisfactory to find a resting-place in classification as well as in geological dis- 

 tribution for the so-called Nummulitic Temnopleurids of MM. d'Archiac and Haime. 

 Without exception, all the species which we can recognize as good for anything, viz. 

 Temnechinus Bousseaui, T. costatus, and T. tuberculosus of d'Archiac and Haime, 

 come from Miocene strata. 



Genus TEMNECHINUS, Farhes, 1852. 



1. Temnechinus costatus, d'Archiac, sp. Plate XIII, Figs. 9, 10. 



This species, with shorter costulate processes in the ambulacra than is the case in 

 Temnechmus affinis, nobis, has taller ornamented interambulacral plates, which do not 

 cross their area as narrow bands, but break up along the median line into short 

 processes, which join the other plate obliquely, and have fossettes above and below them. 

 Hence there is a kind of close confused series of fossettes and processes in the median 

 line. The true shape of the species is tall and tumid, diminishing apically and 

 towards the ambitus. 



Locality. Kattywar Miocene. Three miles east by north of Gaga. Survey- 

 number -^• 



26 



Illustrations of the Species in Plate XIII. 



Fig. 9. The test : natural size. 

 10. A portion : magnified. 



The type was described by d'Archiac and Haime (op. cit. p. 204, plate xiii, 

 figs. 9, a. b), and they lay great stress upon the two vertical series of large tubercles iu 

 both series being on a subcostiform projection. This is not invariable. Again, they 

 notice with greater truth the small fossettes of the interambulacral median line, which 

 are represented in our Figure 10, Plate XIII. 



2. Temnechinus Eousseaui, d'Archiac, sp. Plate XIII, Figs. 13, 14, 15. 



Several specimens of this species are in the Kattywar collection, but one is almost 

 a variety. It is tall, and the fossettes are very large and deep ; but the interambulacral 

 plates are low from above downwards in their ornamentation, and the ambulacral 

 ornamentation resembles that of our figure, Plate XIII, Fig. 10, but with larger 

 fossettes. 



Locality. Kattywar Miocene. Three miles east by north of Gaga and south-east of 

 Gurgat. Survey-number 



HI 

 26 • 



Illustration of the Species in Plate XIII. 

 Fig. 13. Diagram of a section: natural size. 



