110 CRETACEOUS GASTROPODA 
spire, about equal to one of ours represented in Fig. 18 on PI. X, but it does not 
exhibit the slightest difference in the ornamentation, for which reason I believe it to be 
identical. Baily says, that the columellar plaits were not visible in the specimens, 
which he examined, and this would be the only point in which a difference could 
be expected. 
This species is very common in the Trichinopoly district, and the largest speci- 
mens procured attain a height of 100mm. The following are the principal :-— 
Localities —Andoor, Coonum, Shutanure, Anapaudy, Alundanapooram and 
Serdamungalum. 
Formation.—Trichinopoly group. 
3. FAscIOLARIA ASSIMILIS, Stoliczka. Pl. X, Figs. 5—7. 
Fasc. testa fusiformi, attenuata; anfractibus ad medium convexis, infra suturam 
constrictis, spiraliter dense striatis, transversim costulatis : costulis ad sutwram subtu- 
berculatis seu tumescentibus, supra ad medium sinuose-incurvatis ; ultimo anfractu 
spira longiore, antice canali longo extenso ; columella ternis plicis obliquis atque 
crassis ornata. 
Spiral angle 30°; sutural angle 16°. 
Height of last whorl : total height of shell (taken as 1:00) ee 0°54. 
Height of penultimate whorl : height of spire (consd. as 1:00) vee 60°35. 
This species is very well characterised by its much elongated form, great height 
of the single whorls, the numerous fine spiral striz and the transversal ribs, which 
at the suture often terminate in small tubercles, and below the constriction of the 
whorls are strongly bent inwards. This curvation of the ribs corresponds with a simi- 
lar shallow notch on the outer margin of the aperture. On young specimens the trans- 
verse ribs become occasionally nearly obsolete on the last whorl. The largest speci- 
men from Olapaudy measures 140mm., and some fragments would indicate even a 
greater height, they have then a tolerably strongly developed keel at the place, where 
the ribs are insinuated, forming blunt tuberculations. This species resembles much 
Nitra Zekelii, Pict et. Camp. (Fasciolaria gracilis, Zekeli, Gastropoden der Gosauge- 
bilde, Wien, 1852, p. 98, Pl. 16, Fig. 12; Stoliczka in Sitzungs. Akad. Wien, LIT, p. 79); 
but as this is known from very imperfect specimens only, I do not think it safe to 
identify our fossil with it. The transverse ribs seem to be in the Gosau species bent 
nearer to the middle of the whorls, which appear to be also somewhat thinner; no 
spiral striation has been observed, although it no doubt exists. 
Localities —Olapaudy, Comarapolliam, 8. W. of Mulloor, Karapaudy; not 
very common. 
Formation.—Arrialoor group. 
