38 
CRETACEOUS ECHINODERMATA 
The apex is entirely In’oken away, and of tlic original margin of the anal opening 
only one side is preserved. It would he very interesting to obtain better preserved 
specimens of this species, in order that a proper comparison with the European and 
African upper cretaceous U. serkdis, Desh., might be iustituted. 
Locedity. — South-west of Mulloor, in a coarse slightly ferruginous sandstone. 
Foi'mcdion. — Arrialoor group. 
Family —SALENIDJE. 
Comp. Cotteau, Pal. Tran 9 . ton-, cret., vii, p. 82, and Wright, Brit. Cret. Echinod., p. 144, 
iu vol. xxiv of Palioont. Soe. 
This family includes a moderately large number of mostly small sized species 
with the ajiical disc very largely developed, consisting of five smaller ocular, five 
larger genital plates, and in the centre of the latter is a special sur-anal plate, either 
single or divided into several pieces. This great dcA'clopment of the apical disc 
distinguishes the Salekidm from the Cidaridm and allied families. 
The test is generally moderately convex, with the poriferous zones narrow, 
straight, or slightly undulating, the pores being distributed in single pairs. The 
ambidacral areas arc much narrower than the iutcr-ambulacral ; each plate of the 
former has a gramdar tubercle, and besides that sometimes a few Amry fine granules ; 
on the ambulacral plates the tubercles are much larger, and the granules arc generally 
of two sizes, the larger round the areolae, the miliary ones along the inner sutures. 
The upper edges of the tubercular bosses are crenulatcd, and the knobs perforated 
or imperforated. Tbe mouth is roundly hexagonal, more or less deeply notched ; 
the anal opening is eccentric. 
The spines are very A'ariously shaped in the difiFercnt genera, and smooth, or 
more or less granular. 
The Salexie^ are mostly characteristic of the secondary deposits, occurring 
from the middle Jurassic to the uppermost cretaceous strata ; a few are eocene, and 
one or tA\'o species recent. 
Six genera are usually distinguished — 
A. Ambulacra large, straight ; sm-anal plate compound. 
1. Aerosalenia, with the tubercles perforated. 
B, Ambulacra narrow ; suranal plate single ; anus external and posterior. 
a. With the tubercles perforated. 
2. Bsevdosaleiiia ; anus axial. 
3. Ileterosalenia ; anus extra-axial. 
h. With the tubercles imperforated. 
4. Goniophoriis ; anus axial, and ambulacra with poriferous impressions. 
5. Peltastes; anus axial, without poriferous impressions in the ambulacra. 
6. Salenia; anus extra-axial. 
Of these genera only one is represented in the South Indian cretaceous deposits 
with a single species. 
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