126 CRETACEOUS GASTROPODA 
4, TRITONIDEA TRICHINOPOLITENSIS, Forbes, sp. Pl. XI, Fig. 4. 
1846. Murea Trichinopolitensis, Forbes, Trans. Geol. Soc. Lond. VII, p. 127, pl. 15, fig. 7. 
ro idem D’Orbigny; Gabb; Pictet; &c. 
Trit. testa elongata, ad medium inflata, utrinque attenuata; anfraetibus senis ° 
primis levigatis, ceteris costate-cingulatis, transversim costatis, ad medium angulatis ; 
supra angulum duobus striis fortioribus atque multis minoribus ornatis, costis sub- 
obsoletis; apud et infra angulum crasse tri-cingulatis, in interstitiis etiam multi- 
striatis; costis transversis rectis, ad angulum nonnunqnam tuberculosis seu spinulosis ; 
ultimo anfractu antice canali moderato protracto, valde constricto ; labio intus levigato, 
postice tenui, antice incrassato ; labro ad marginem intus sulcoso ; canali ad termi- 
nationem lateraliter atque supra recurve. 
Spiral angle 65°; sutural angle 8°—9°. 
Height of last whorl : total of shell (considered as 1:00) .» 0°60—0°65. 
Between the principal spiral strive there is always a dense and fine striation 
perceptible, and some of these secondary strive vary again in strength. On the 
upper flat portion of each whorl there are only two stronger striz and on the 
lower (on the last whorl the middle) straight portion three, respectively much 
thicker, and the uppermost occasionally forming rounded tubercles on the edges of 
the transverse ribs. These latter become obsolete on the posterior portion of each 
whorl as well as on the anterior portion of the last. The strive of growth are very 
distinct and produce occasionally with the finer striation a kind of minute granulation. 
The canal is only slightly bent laterally, but it is more strongly bent upwards than 
in any of the other species, and on its termination it appears to be also somewhat 
widened. The inner lip thickens somewhat towards the anterior extremity. The 
only known species which it would seem very desirable to compare with the Indian 
fossil, is Fusus Nereidis, Mimst. (in Goldf. Petref. Germ, III, 1841-1844, p. 24, 
Pl. 171, Fig. 20). A perceptible difference, judging from Goldfuss’ figure only, les 
in the spiral striation, although this could be easily explained from the state of pre- 
servation. Miimster’s species appears to be pretty common in the middle cretaceous 
deposits of Germany; (vide Zeitsch. Deutsch. Geol. Gesell. XV, p. 340). 
Localities —N. of Alundanapooram and 8. of Olapaudy; appears to be a 
rare shell. 
Formation. —Trichinopoly group. 
