504 CRETACEOUS GASTROPODA 
convexo, postice angustiore; apertura semilunari, labio tenm, columella profunde 
excavata. 
Spiral angle 102°; sutural angle 4° - 5°. 
Height of spire : total of shell (considered as 100)... ae Ondo 
This well known European species is distinguished from Husp. spissata by a 
distinct canaliculation of the whorls along the suture, by a largely umbilicated 
columella, and by a somewhat shorter spire, the large-size of the last volution being 
similar in both. ‘The general structure of the shell is also somewhat thinner, and 
less distinctly punctuated in the former than it is in the present species. 
Locality —Neighbourhood of Ninnyoor, in whitish arenaceous limestone; not 
vare.—In Europe the species occurs all through the Alps, as also in Germany in the 
upper cretaceous beds, which are equivalent to d’Orbigny’s Twronien and Sénonien. 
The species was again only lately (Wirtemberg. Jahreshefte XXIII, 1867, p. 243,) 
found in Palestine by Prof. Fraas in bituminous limestone with Baculites anceps, 
Lam., ete. 
Formation.—Arrialoor group, being the most recent of our 8. Indian cretaceous 
deposits. 
6. Evusprra Maria, d’Orbigny, Pl. XXII, Figs. 6-8. 
1846. Natica sutwralis, Sow. apud Forbes, Trans. Geo. Soc., Lond., VII, p. 1387; non zd. Gray, 1839. 
eS »  saturnalis ,, 59 Py 3, 3 55 a » PI. XV, Fig.1; non zd. Grat,, 1843. 
1847. » Marie, D’Orbigny, Paléont. Astrolabe, Pl. III, Figs. 32-33. 
1850. es , Prodrome, II, p. 221. 
1851. » vulgaris, Reuss apud Miller, Petref. Aach. Kreidef., Pl. II, p. 14 (non id. Reuss). 
Eusp. testa sub-globosa, levigata, spira brevi aut moderate elevata, anfractibus 
quinis sew sents, convexiusculis composita, ultimo maximo, latiore quam alto, omninis 
postice canaliculatis, margine suturali tumescente instructis; apertura semilunata, 
labio tenui; basi ultimi anfractus convexa, in medio profunde lateque excavata. 
Spiral angle 90° - 110°; sutural angle 5°. 
Height of aperture : total of shell ... ... (considered as 1-00) ee UiOS: 
a o : width of the last whorl ( y a sen OZ 
The short spire, globose form, great width of the last volution, and the posterior 
canaliculation, having along the suture a distinctly thickened margin, are the 
principal characters of this species. The surface is smooth, except that the usual 
lines of growth are traceable; the basis of the last whorl is roundish, and its 
columellar excavation increasing in width with the size of the shell; the aperture 
semilunar, large, but not very oblique, the inner lip thin. 
Forbes’ figure is very characteristic and does not leave any doubt as to the 
identity of the species; D’Orbigny’s representation is, however, very insufficient ; it 
shows the sutural margin only slightly, and no excavation on the columella; it 
would have been impossible without a comparison of the originals to identify both. 
[ have quoted the Nat. vulgaris of Miller as a synonym, because I have been able 
to examine the original specimens in Prof. Miiller’s collection. It is very interest- 
ing to find this species in the Senonien deposits of Aachen, for this makes it probable 
