412 CRETACEOUS GASTROPODA 
through Mr. Bosquet, I strongly suspect that this species is not different from R&R. Verneuilh of 
d’Archiac ; I am at least unable to trace any difference between those specimens and d’Archiac’s 
figure. 
147. Ring. varia, Gabb (Pal. Calif. I, p. 112). 
Luptycha. 
148. Auricula (Avellana) decurtata, Sow., from the Alpine Gosau formation is the only Euro- 
pean species of Huptycha as yet known. 
149-151. Buptycha globata, larvata and oviformis, occur in the ecretaceous beds of Sth. India 
and will be described subsequently. 
Thus viewing the large number of cretaceous Acr#onrp4, it is seen that many 
of the so called species require further examination and correction, but even with 
the existing deficiencies the importance of the group for the study of cretaceous 
fossils cannot be denied. : 
The acrmonrve are the first known to appear in the palzeozoic deposits, 
and are more numerous in the jurassic than in the cretaceous period. The 
APLUSTRIN® are always very scarce; there are only a few jurassic and cretaceous 
species known; the recent species are also very local. The rzyercvirws# first 
appear in the cretaceous period as a distinct type; when young they very much 
resemble Acte@on. The largest number of the specific and generic forms appear 
to become again extinct in the cretaceous period, only one, Ringicula, being known 
recent, though by no means a common shell. 
XCVIII. ACTMONINA, d’Orbigny, 1850. 
1. AcTMONINA OBESA, Séoliczka, Pl. XXVIII, Fig. 31. 
Act. testa elongata, spira turrita; anfractibus sub-convexis, ultimo maximo, 
sub-inflato ; superficie spiraliter punctato-sulcata, sulcis circiter senis, nonnullis pos- 
ticis prope suturam sitis et alteris anticis approximatis, fortioribus et tenwioribus 
alternantibus ; apertura amplissima, labio antice ad marginem incrassato, labro tenut. 
Spiral angle about 50°; sutural angle about 8°. 
Approximate height of spire : total of shell (considered as 1:00)... 0°32. 
Width of last whorl : approximate height of shell ( 3 m= )) coo OY, 
We only possess fragments of this shell, but the last whorl is nearly perfect 
at the aperture, which is that of a true Acteonina. The inner lip is anteriorly 
distinctly flattened, but without a trace of any fold. The whorls are slightly 
convex. The surface is marked all over with punctated impressed lines, some of 
which are placed near the suture, and others near the anterior termination, being 
rather more closely arranged than those in the middle, and alternating in strength. 
Locality —Comarapolliam, in soft, coarse grained, siliceous sandstone; appa- 
rently very rare. 
Formation.—Arrialoor group. 
