OF SOUTHERN INDIA. 407 
resembles in general form a Ringicula or Ringinella, but the two columellar folds 
are placed in the middle of the lip, resembling those of several Averzcuzripa, like 
Ophicardelus or Leuconia. The aperture is semi-circular, but as in all casts of 
the rmvercuLivs entire. The only probability of this genus (if at all distinct from 
those previously mentioned), belonging to the present sub-family, is the presence of 
thickened margins of its aperture, which from the impressions they have left on 
the cast are supposed to exist on the perfect shell; this, however, only allows a 
conclusion to be made as to the internal, not the external, thickening. 
22. <A distinct type of the rzvezcv~rv“ may be represented by the Avellana 
ventricosa, Binkhorst (Gast. et ceph. craie de Limbourg, etc., 1861, p. 63, pl. 5%, 
fig. 5, and pl. 5%, fig. 12), but the shell is only known from a cast; this one in 
general form resembles that of an Avellana with a short obtuse spire, the surface 
being spirally suleated, the aperture elongated, almost throughout equally narrow; 
and internally finely denticulated on both the inner and the outer lips; this 
denticulation extremely resembles that of a Cyprea, and as there is no trace of 
the external shell perceptible, it is impossible to ascertain whether the species 
belongs to the zrveicutinz or to the CrprazrDZ. 
At last I may mention the name Aptycha, which was proposed by Meek 
(American Journ., XXXV, p. 93) for Tornatella labiosa of Forbes, and which 
is a true Ringicula, as will be shown from the description and figure of Forbes’ 
original specimen. The name Aptycha must, therefore, be struck out of the list 
of genera altogether, unless some one be so fortunate as to discover a species 
with thickened lips and no columellar folds, or thickened edge of the inner lip. 
The cretaceous species of the Acr#onipz# are rather numerous, but not many 
of them are known in a desirable state of preservation, and, therefore, their correct 
generic determination must for the present remain uncertain. The determination 
of cast specimens is almost never to be depended upon, because the external 
thickenings of the shell so very much alter its form. The following genera appear 
to be represented. 
Actaonina. 
Pictet and Campiche (Mat. p. 1. Pal. Suisse, III Ser., p. 186, etc.) mention five species of this 
genus, all from the lower eretaceous beds ; 
1-5. Act. Dupiniana, VOrb., sp., Act. Nerei, P, and C. (W’Orb.?), Act. Lcaunensis, Cotteau, 
Act. Renevieri and Chavannesi, P. and C. 
6. <Acteonina Terana, Romer, sp. (Kreidegeb. von Texas, p. 40, pl. 4, fig. 2) was described 
as a doubtful Hudima, and it can only doubtfully be placed in this genus, though it more probably 
belongs to it. 
7-8. Act. ? pupoides and Californica are described by Gabb in the Paleont. of Calif., I, pp. 113 
and 114, They both appear rather doubtful, not having been as yet found in good preservation. 
9. Act. volgensis, Kichwald (Leth. Rossica, XI, livr., 1867, p. 831), is said to occur in the 
Neocomien clay of Bessonowo. 
10-11. Act. obesa et columnaris are two new species from our South Indian cretaceous deposits ; 
the descriptions will be given subsequently. 
12. Phasianella lineolata, Reuss (Boéhm. Kreidef., I, 1846, p. 49, pl. 10, fig. 19) could be 
referred to Actgonina, or some of the allied genera with more elevated spire, like (Auriculina). 
