414 CRETACEOUS GASTROPODA 
Localities—Near Garudamungalum and near Veraghoor, in sandstone; not 
very rare. 
Formation.—Trichinopoly group. 
2. BULLINA crETACEA, d’Orbigny, sp., Pl. XXVII, Fig. 19. 
1847. Bulla cretacea, d’Orbigny, Voy. d’Astrolabe, Paléont., Pl. III, Figs. 18-21; (non idem., Miiller, 
1851). 
. Bull. testa elongata, cylindracea, postice paululum angustiore quam antice, 
striis incrementi tenwibus, nonnunquam subrugosis notata, spiraliter undique striata, 
striis obsolete punctatis ; anfractibus ad marginem posteriorem rotundatis, spira 
aliquantum timmersa, apice paulo imcrassato; apertura longissima, recta, angus- 
tissima, antice latiori, labro ad marginem tenui, labio antice paululum incrassato, 
vie torto. 
Width of shell : its height (considered as 1:00) ... es tee oe 0°47, 
This species is principally characterized by its prolonged cylindrical shape, 
being posteriorly only a little narrower than anteriorly, and by the whorls being 
rounded at the posterior edge; the spire is somewhat immersed, but distinctly 
traceable, the suture being impressed and the apex thickened. The entire surface 
of the shell is covered with very numerous, obsoletely punctated, fine spiral furrows, 
and with transverse striz of growth, which are near the aperture and posteriorly 
generally somewhat more distinct than they are anteriorly, though I have never 
observed such a strong difference as exhibited in d’Orbigny’s original figure. 
The aperture is linear, straight, posteriorly very narrow, anteriorly expanded 
and rounded; the outer lip is sharp at the edge and the inner lip anteriorly some- 
what thickened, reflexed, and internally very slightly twisted. 
Miiller’s Bulla ( Cylichna ) cretacea* from the Aachen Senonien deposits is 
distinct from our species, being anteriorly much narrower. Miller subsequently+ 
considers d’Archiac’s Bulla ovoides as identical with his B. cretacea, though 
d’Archiac’s figure evidently represents a shell somewhat stouter, or at least some- 
what more inflated in the middle. Bosquet proposed for Miiller’s B. cretacea the 
name B. Wiilleri. D’Archiac’s Bulla Palassoui very much resembles in form our 
Indian Bullina cretacea, but specimens which we have received from Mr, Bosquet 
show that the former species is a true Cylichna. 
Locality. —Garudamungalum, in light bluish calcareous sandstone; very rare. 
Formation.—Trichinopoly group. 
* Petref. Aachner Kreidef., pt. IT, 1851, p. 7, pl. 3, fig. 4. 
+ Ibid. Supplement, 1859, p. 20. 
