576 CRETACEOUS GASTROPODA 
D’Archiae’s figure of Turbo Walferdini from the Tourtia of Tournay (Mém. 
Soc. Géol., France, 1847, 2nd ser., vol. IT, p. 341, pl. 24, fig. 6) reminds one very much 
of the characteristic form of Sol. radiatula, but the author says that the umbilicus 
is covered with a large callosity, which, of course, would refer this shell to 
another family altogether, being probably allied to the genus Chrysostoma of the 
Umeonipz. 
Localities.—Vylapaudy, Olapaudy, Comarapolliam, Arrialoor, ete. (Arrial. ep.) ; 
Andoor and Kolakonuttom (Trich. gp.); south of Puravoy, Moraviatoor, Odium, 
(Oot. gp). 
The beds of Aix-la-Chapelle, where the species is not uncommon, are consi- 
dered as equivalents of d’Orbigny’s Senonien. 
_ Formations.—Arrialoor —, TrichMopoly —, and Ootatoor— groups. 
The species may be considered characteristic only of the first named group, 
as it appears to be rather a rare shell in the two others. The numerical proportions 
of the specimens represented in our collection from different localities of the 
three named groups are 200—-25—4 respectively. 
2. SOLARIELLA STRANGULATA, Stoliczka, Pl. XXIV, Fig. 20; 
PS XOXGVAE Eo 10: 
Sol. testa conica, subturrita, anfractibus circiter senis, convexis, spiraliter dense 
striatis, postice ad suturam jugo rugoso instructis, deinde anguwste-canaliculatis atque 
rursus una vel duabus striis fortioribus notatis; striis transversalibus minutis ; basi 
convexa, umbilicata, margine umbilict crasso, subtuberculato ; apertura subrotundata, 
untice in margine umbilici emarginata, labio atque labro intus levissimis, crassiusculis, 
ad marginem acutis. 
Spiral angle 70°; sutural angle 12°-13°. 
Height of shell : diameter of its basis (considered as 1:00) vee noo lie, 
» one whorl : its width ( p op) Piss ao OB 
This species very closely resembles the previous one, but can be readily distin- 
euished by a strongly thickened and rugose posterior margin of the whorls, having 
in front a narrow, but deep channel, to which follow one or two rather strong 
spiral strie. To exhibit the differences of the two species more clearly we have 
given an enlarged view of a portion of the whorls of each on Pl. XXVIII, 
Figs. 8, 9 and 10. 
The number of whorls appears to be also somewhat smaller in the present 
species, than in the former. The surface is finely spirally striated; the edge 
of the umbilicus very thick and subtuberculated, intefnally slightly granulated. 
‘The internal pearly structure of the shell is distinctly traceable in two of our 
specimens. 
Locality —Near Odium, in a brown and blaekish caleareous sandstone; rare, 
only three specimens having as yet been found. 
Formation.—Ootatoor group. 
