410 CRETACEOUS GASTROPODA 
Trochactaon. 
Treating of the species of Zrochacteon (Acteonella, olim) occurring in the deposits of the 
Alpine Gosau formation, I have mentioned the following species (Sitz. Akad., Wien, 1865, LII, 
pp- 515-519), 
75-79. Tr. (Acteonella) giganteus, Sow.,* Tr. Lamarkii, Sow. sp., Tr. conicus, Miinst. sp., 
Tr. Lefebreanus and Toucasianus, d’Orb., the two last ones being known only from very short notes. 
80. Zr. Beyrichii, Drescher, is probably the same which has formerly been mentioned by 
Geinitz, Reuss and others under the name of Act. gigantea. 
81-82.? Acteonella de Cristoforis, Bass, and Act. Reussi, d’Orb., remain as yet doubtful species. 
83-85. Acteon Verneuilli, Vill., Acteonella fusiformis and oliviformis of Coquand (Etage 
Aptien de ? Espagne, 1865, pp. 68-69) all belong to Zrochactaon. 
86-87. Acteonella syriaca, Conr., and Act. Salomonis, Frs. (Wiirtemb. Jahreshefte, XXIII, 
1867, pp. 239 and 240) from the upper cretaceous beds of Palestine, also belong to Trochactaon. 
88.? Judging from the statement (iid., p. 240) that the ‘shell is flattened along the suture, I 
very much suspect that Phasianella Absatlonis, Fraas, is probably also a species of the same genus. 
Hichwald (Leth. ross., XI, livr., 1867, p. 830) mentions from Armenia an Actegonella voluta, 
Zek. ; the original species of Zekeli is identical with Trochactzon Lamarkii, Sow. sp., but whether the 
Armenian one is the same remains to be ascertained. Lichwald also notices a few other species 
which will be mentioned hereafter. I have also compared in the Museum at Bonn the Glodiconcha 
coniformis, Romer (Kreide. von Texas, p. 42, pl. 4, fig. 5), and it seems to me that the specimen 
shows some folds on the anterior portion of the columella; the specimen is badly preserved, but it 
is very probable that it is a cast of a Trochactaon. Actaonella sp., Binkhorst, Monog, Gast. et Ceph. 
craie, Limbg., p. 83, also most probably belongs to Trochactaon. 
89-91. Trochactezon truncatus, minutus and cylindraceus, will be described from our South 
Indian cretaceous deposits. 
92. Of the sub-family apzusTrRINa I may mention the doubtful Budlopsis cretacea, Con., from 
N. America, but it is possible that some of the species of Actwonina may be proved to belong 
to Bullinula. Some authors also refer Globiconcha of d’Orbigny to the family Aerzonripxa, When 
lately at Paris I endeavoured to find out from d’Orbigny’s collection in the Jardin des plantes 
the real signification of the name Globiconcha, but I turned away disappointed not being able to 
arrive at any reasonable conclusion. Not one of the specimens named by d’Orbigny is a perfect 
shell, but all imperfect casts, which can be very variously commented upon. Some of them have 
been shown to belong to Cypr@a ; others appeared to me to represent casts of Zylostoma, Natica and 
probably of Cinulia. There have been, however, by subsequent authors various globular shells 
described under the name of Glodiconcha, and of these some very much resemble Bu/linula and 
Hydatina. 
93. Bulla ornata, Guéranger, Album pal. de la Sarthe, pl. 14, fig. 26, is evidently a Bullinula. 
94. Bullinula indica from South India will be described subsequently. 
The RINGICULIN are, as already mentioned, mostly cretaceous forms with the exception of 
Ringicula, which remained unaltered up to the present time, and a Ringinella Mississippensis quoted 
by Conrad from the oligocene beds of Vicksburg (Check list of eocene foss. of N. America, 1866, 
p. 28). I shall again first quote the species recorded under the name of Avellana by Pictet and 
Campiche in the Paléont. Suisse, 3 ser., pp, 209-219, and note afterwards any further additions. 
Ringinella, Several species probably belonging to this genus have already been mentioned 
under Act@on. 
95-102. Avellana aptiensis, lacryma, valdensis, Clementina, inflata, alpina,t Mailleana and 
Hagenovi, (see Pictet and Camp. Pal. Suisse, III. Ser.). 
* (2) Acteon giganteus 2? Sow. in Staring’s Bodem von Nederland, IT. deel. 
+ Tornatella pyrostoma has already been mentioned under Acteon. 
