OF SOUTHERN INDIA. 233 
3. ScaLa stRriAtocostata, Miller, Pl. XVIII, Figs. 4-5. 
1851. Scalaria striatocostata, Miller, Petref. Aachner Kreidef., pt. II, p. 7, Pl. V, Fig. 3. 
Sc. testa turbinate-conica ; anfractibus valde convexis, 15-18 costis transversalibus, 
tenuibus, lente curvatis, atque striis minutissimis spiralibus ornatis : costis in basi ultimé 
anfractus prolongatis, sed multo tenuioribus ; basi sub-convexa et prope peripheriam 
carinata, sectione anfractuum rotundata. 
Spiral angle 27°- 32°; sutural angle 8°. 
Fig. 4. Fig. 5. 
Height of last whorl : total of shell ... ... (considered as 1:00) vo. O32 — 032. 
a » penultimate whorl : height of spire ( A pee) o> O22 —- 0°26. 
” 2” 2” ” : its width oe ( ” ” ” ) oe O47 — 0°45. 
This species is readily distinguished from Scala subturbinata, D’Orb., by having 
the transversal ribs more distinctly curved, thinner and sharper, and the spiral 
striation much finer; the basal keel of the last volution is placed somewhat nearer 
to the periphery, than is the case in the previous species. The fine spiral strize are 
very easily worn off, although the specimens appear to be otherwise well preserved. 
The number of transverse ribs is about 15 in one whorl of the elongated specimens, 
and increases to 18 in shorter ones (comp. Figs. 4.and 5). There is otherwise no 
difference between these two forms. 
The figure given by Prof. Miiller is very indistinct, but having lately had an 
opportunity to examine the rich collections of Aachen fossils belonging to that 
gentleman, I have been able to prove the identity of both. 
Localities.—Olapaudy and Comarapolliam, in light coloured sandstones; rare. 
Formation.—Arrialoor group. 
4, ScaLaA SHUTANURENSIS, Stoliczka, Pl. XVIII, Figs. 6-8. 
Sc. testa elongate-turbinata, crassa; anfractibus convexis, transversaliter 12-15— 
costatis, antice ad marginem interdum subcarinatis, spiraliter striatis : costis crassis 
prope rectis; striis inequalibus, circiter octonis fortioribus atque multis tenuioribus 
interpositis ; basi ultimi anfractus paulo producta, subconvexa, costis tenuibus atque 
striis spiralibus ornata, ad peripheriam carinata ; sectione anfractuum rotundata. 
Spiral angle 24°- 25° ; sutural angle 10°. 
Height of last whorl : totalof shell .,. ... (considered as100) .. O81. 
45 », penultimate whorl : height of spire ( as sO) nod RED 
” ” PS ; : itswidth ... ( 66 esi uestiiimcss: .0;48s 
In general form of the whorls and in the number of transverse ribs the Indian 
species very much resembles the European Se. Dupiniana, D’Orb. (Pal. Frang. 
terr. crét. II, p. 54, pl. 154, figs. 10-13), but the spiral striation is in this last 
named species always finer and more uniform. 
The anterior margin of each whorl has. sometimes along the suture a keel 
visible, which is specially strongly developed on the periphery of the basis of the 
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