258 
THE LIAS AMMONITES. 
Acnnthoceras Brottianum, d'Orb. Acantlioceras Mantelli, Sow. 
— Deverianum, d'Orb. — Rliotomagense, Brovg. 
— mammillare, Schl. — Sussexiense, Sharp. 
— Martinii, d'Orb. — Woolgarei, Mant. 
All these species have been separated from HopUtes, and some of them have appeared 
under that generic name in the earlier part of this Monograph. They are, however, now 
placed as indicated by Neumayr in his latest work on this subject. 
Fig. 175. Fig. 176. 
Acanth. Deverianum, d'Orb. Acanlh. Martinii, d'Orb. 
Genus Stoliczkaia, Neum., has been erected to receive a small group of remarkable 
Ammonites figured and described by Dr. Ferd. Stoliczka^ in his great work on the 
Ammonitidae from the Chalk of Southern India, some of which were compared 
with Arcestes from Hallstatt. Stoliczkaia Telinga, Stol., in its external form, certainly 
resembles some of the gigantic Arcestes from the Alpine Triassic strata of Hallstatt in the 
form and smoothness of the shell, and in the constriction of the mouth-border ; but in the 
shortness of the body-chamber, and the structure of the suture-line, it has not the 
most remote resemblance to the Triassic forms from the Austrian Alps, with their very 
characteristic suture-line, and their long body-chamber of one whorl and a half in length. 
The shell is massive, highly involuted, sometimes discoidal, and then with a wider 
umbilicus. Body-chamber about three fourths of a whorl in length. Mouth-border undu- 
lated, produced in the middle of the lateral wall, and slightly excised towards the siphonal 
or ventral area. The inner whorls provided with radii, which are not interrupted on the 
ventral area ; the ribs attain here their greatest development ; the body-chamber has a 
smooth shell ; in some species it has thickened ribs ; the ventral side has neither a keel nor 
channels. The lobe-line is much ramified, consisting of a siphonal lobe and a principal 
and lower lateral on each side, with a more or less developed columellar lobe having 
pendant digitations. 
I refer the reader to Dr. Ferd. Stoliczka's magnificent volume on the Ammonitidas 
from the Cretaceous formations of Southern India for remarkable types of this genus, 
such as : 
^ ' Palffiontologia Indica,' " Aramontidse of the Cretaceous Formation." 
