218 CRETACEOUS GASTROPODA 
3. TURRITELLA (TorcULA) GEmiIna, Stoliczka, Pl. XVI, Figs. 10, 11; 
Pl. XIX, Fig. 9. 
Turr. testa elongate-conica ; anfractibus planulatis, suturis profundis sejunctis, 
postice paulo tumescentibus, et ad medium lente excavatis, spiraliter 7-8-striatis, 
antice prope suturam bicarinatis; striis transversalibus incrementi minutissimis, 
insinuatis ; bast plana, spiraliter striis fortioribus atque tenwioribus ornata; apertura 
angulari, labio antice paulo-incrassato, labro tenuissimo. 
Spiral angle 30°; sutural angle 3°- 4°. 
Height of last whorl : total of shell (considered as 1:00) ou wee RODS 
Height of penultimate whorl : height of spire (consd- as 1:00) ... coo LOS: 
oh op 43 : Its width (consd. as 1:00) sa wo» O49. 
The two keels on the anterior or lower margin of each whorl are very charac- 
teristic of this species ; they seem to be always present, the marginal one being some- 
what thinner than the one above. The rest of the surface of the whorls is covered 
with seven or eight spiral strize, either all of nearly equal strength, or one or two 
in the middle stronger than the others. The middle portion of the whorls is in 
young specimens perfectly flat, in older ones a little concave; the posterior portion 
is also in larger grown specimens somewhat thickened, sloping gradually towards 
the suture. The striz of growth are very fine, insinuated about the middle, 
producing often a slight undulation on the spiral strize. 
Localities —Near Arrialoor and Karapaudy, in whitish siliceous sandstone ; 
very rare. 
formation.—Arrialoor group. 
4, 'TURRITELLA (ToRCULA) pDiIspassa, Séoliczka, Pl. XVI, Figs. 18, 14; and 
JHb OOD. Inesy IO Ils 
Turr. testa elongata; anfractibus numerosis, angustis, ad suturas valde contractis, 
prope marginem anteriorem acute carinatis, primis fere planis, posterioribus ad 
medium lente excavatis atque supra excavationem paulo tumescentibus, spiraliter 
striatis : striis numerosissinis, tribus seu quatuor fortioribus ; lineis incrementi insinu- 
atis ; bast ultumi anfractus aliquando producta, convexa, spiraliter striata, ad peris 
pheriam carinata ; apertura angulari, altiore quam lata. 
Spiral angle 20°- 22°; sutural angle 8°- 9°. 
Approximate height of last whorl : total of shell (considered as 1:00) ... 0°22. 
a » of penultimate whorl : height of spire (consd. as 1:00) 0:17. 
5 ay eo » + ibs width (consd.as 1:00) ... 0:58. 
The single sharp keel along the anterior margin of each of the whorls, which 
are very high in proportion to their width, the slender form, and the strongly 
produced basis of the last volution distinguish this species readily from 7. gemina, 
n. sp., or Z. Pondicherriensis, Forb. 
