OF SOUTIIEEX INDIA. 
39 
XII. Genus. — SALEXIA, Gray, 1835. 
The Balen'm are mostly cretaceous, occurring from the lowest to the highest 
strata ; very few species arc from tertiary heels. 
1. Salexia Arcotensis, StoUezka. PL VI, Fig. 6. 
S. lesla, 2>(irm, circxdari, mocUce liemisph erica, disco apicali late conoideo, per- 
marjno ; tahulis genitalihiis late perforatis, radiatim costulis stdjgranulosis ornatis ; 
tab. ocxilaribus magnis, trigonis, axiguste perforatis, ad xnarginem extermim ixicrassa- 
tis, margine mediano paidulum insinuatis ; anibtdacris angustissimis, tubercidis sub- 
mammilatis, circiter 14, Icerigalis, valde appx'oximatis, in area mediana graxitdis 
onimdissiniis separatis instruclis ; zonis poriferis bigeminatis, fere rectus. Zonis 
inleramhtdacralibus latis, tnberculis primariis biserkdihiis cWciter octo, ineequalibus ; 
qiiaque tabula ad angiduni externum unigranosa, interne prope areolam granis 3-4 
majorihus, ad marginem pluribus xninoribus subcequalibus instructa. 
A small species, with a rather depressed, circular test and a very large, broadly 
conoid apical disc, which slightly overlaps the edges of the test, as is usually in 
Teltastes and Salenia. The anus is small, suh-elliptical, situated without the axis of 
the animal ; the mouth compai’atively very large, with small hut distinct incisions in 
tlic margin . The base is slightly convex. 
The suranal plate appears to ho nearly smooth, indented by the anal opening 
at the posterior right angle. Each of the genital plates is subcentrally pierced 
hv a rather large ovoid opening, surrounded by a thickened margin, from whicli 
radiate indistinctly granulated ril)s, or rows of granules; in the madreporiform 
plate the opening is narrowly elongated toAvards the axis. Each of the ocular plates 
is suhtrigonal, with a small almost central pore, in the middle of the external 
margin slightly indented, Avhile the corner margins are strongly thickened, and 
almost tubercular. There is also a small pore present in the middle of the sutm-e 
hetAveen each tAVo genital or ocular plates and also in each corner, whenever three of 
the plates meet. 
The aiAihulacral zones are very narrow, with about fourteen paii’s of alternating, 
closclv set, smooth tubercles, a feAV of them towards the mouth are conspicuously 
lar«’cr thair the rest ; the two scries arc separated by very minute subequal, densely 
set granules. The poriferous zones are nearly quite straight, and there arc twenty-fi\m 
oblique pairs of pores in each series. The intcramhnlacral area is very broad, with 
tAVO roAVS of primary tubercles, the tAVO upper ones in one row, and the two middle 
ones in the other being the largest ; the boss is regularly conoid, smooth, strongly 
crcnulated on the upper margin; the mammelon hemispherical, comparatively 
rather small, smooth, imperforate. Each amhulacral plate has one granule at each 
corner of the poriferous side, and three or four along the areola on the opposite side, 
L ( 1^9 ) 
