or SOUTHERN INDIA. 
65 
longitudinal somewhat distant ril)s on one-iialf of the circuit, five somewhat closer 
on tlie other. Tlie external layer of the shell is more compact than the inner, which 
breaks off in thin lamellae. On the section the longitudinal ribs arc perfectly clearly 
traceable, hut the shell is so thoroughly attached to the rock that it always 
leaves only the cast visible as soon as an attempt is made to remove it. 
I can only add an approximate figure of the outer side and of the section. 
5. Ditrl'pa? LOXGissniA, Forbes. PL XII, Fig. 12. 
Traus. Geol. Soc., Loud., vii, p. 157, pi. xix, fig. 13. 
‘ D. testa cylindr tea, longisshna, concentrice reyulariter striata, striis minutissimis, 
‘ (nucleo Iccvi).' 
‘ Length o£ specimen 41 inches, diameter inch. 
‘ A very long, regularly curved, cylindrical shell. The surface is marked with 
‘ very minute concentric striae. The cast is smooth. The habit is so truly that 
‘ of a testaceous tuhicular Annelide, and the regularity of form so similar to the 
‘ aspect of a Ditrupa, that, although the mouth is not preserved, I have little hesi- 
‘ tation in referring it to that well-marked genus. 
‘ It is contained in a mass of rock from Pondicherry, and is associated with 
‘ Baculites, and various univalve and bivalve shells.’ 
Such is Forbes’ account of this species. From the last reference to Baculites, 
it appears most probable that the beds referred to belong to the Arrialoor group. 
There is no specimen of it in our collection. 
CRUSTACEA. 
Prof. Forbes gave a figure of the carapace of a crab from Pondicherry out 
of Mr. Kaye’s collection. A second specimen Ai^as presented by Mr. Cunliffe to 
our Museum, hut it is, like the former, incomplete. A^ery probably it belongs to some 
species of a Neocarcinus. I give figures of both on pi. xii, figs. 13 and 11. Our 
specimen is either from the Arrialoor beds at Pondicherry, or, judging from the 
occurrence of Turritella affiiiis, StoL, with our specimen, it may also he from the 
Veraghoor sandstone of the Trichinopoly group. 
A second specimen of a Crustacean is from the Ootatoor shales at Ootatoor ; it 
is the left hand of an Ilajdojxtria, or some other closely allied genus. A figure of 
this fragment is also given on pi. xii, fig. 15. 
The only other Crustacean which I saw was a small Cytheriiia from the yellow 
Arrialoor sandstones at Yerinauoor, occurring together with Siygmatopyyus elatus, 
(Forbes). 
R ( 197 ) 
