16 
CRETACEOUS ECUINODERMATA 
“ the posterior ovate, approximate and vciy deep. In the former are 23 pairs of 
“ pores in each series, placed on the slopes of the depression ; in the latter 18. 
“ Beneath, the surface is convex posteriorly in consequence of the form of the 
“post-oral space, but the cheeks ai’e nearly flat.” 
Such is Eorhes’ description of this species. When examining Eorhes’ type in 
1867, in the collection of the Geological Society of London, I observed, that it is 
closely allied to U. incequalis, being somewhat more convex, particularly at the 
sides towards the peripheiy, and also higher in proportion to the length. I do not 
remember the exact form of the petals, but the description docs not tally with the 
figiu’c. Eorhes calls the antero-laterals “lanceolate” and the posteriors “ ovate 
the figure shews them both truncate, quite as much so as in the next species. 
We possess in our collection only a fragment (see fig. I, pi. ii) which was many years 
ago presented by Mr. Cunliflh, and which appears to be referable to the present 
species. The apex is somewhat depressed, with the genital plates well preserved ; the 
madreporiform plate is so large as to entirely separate the posterior right plate from 
its corresponding left one. The upper surface of the test is finely granular, the 
low^er more coarsely, while at the sides the granules are nearly obsolete. The 
anterior pah of ambulacra diverge under an angle of nearly 130 degrees, the 
posterior under an angle of about 60° ; one series of the former has 25 pahs of 
pores, one of the latter about 20 ; in each case the smallest pores near the apex are 
included. The pairs are rather distant, and the pores in each connected by a groove ; 
towards the end they slightly approach each other, and hence probably Eorhes’ 
terms of ‘ lanceolate’ and ‘ovate.’ 
The postero-lateral ambulacra are one-third shorter but somewhat deeper than 
the antero-laterals. The form of the fasciolc is as figured by Eorhes, its posterior 
half becoming very abruptly contracted immediately after passing round the antero- 
lateral ambulacra. 
Locality and Formation . — The above-noticed fragment is from the soft whitish 
sandstone near Pondicherry, belonging to the Arrialoor group, and it is most probable 
that the specimen described by Eorhes is from the same locality. 
8. HiiMiASTER iNDicus, StoUczka. PI. II, Eigs. 6 — 7, & PI. Ill, Eig. 1. 
H. testa ovato cordata, aqyice suhcentrali, vel 2)Ostico, lateribus convexis postice 
paulo altiore quam antice, medio rotundate crista ta, ad terminationem verticaliter 
trimcata, infra convexiuscnla ; undique granulato-tuhercidifera, tuherculis intra 
fasciolam peripctalem distantibns, ad periptieriam approximatis, infra paulo majori- 
bus. Ambidacris excavalis : sidco anteriori lato, lateribus subrotundatis, ad periphe- 
riani subangustato, ab ajnee usque ad fasciolam in una serie poris 22 instructo, 
prmiis approximatis, xdtimis valde distantihus ; oAnbulacris lateralibus subcequalibxis, 
( 86 ) 
