CRICK: ON AMMONITES ROBUSTUS, BLFD. 291 
referred to this species are in the British Museum collection 
(Nos. C. 5,050 and C. 5,046). Although Triassic fossils, they were 
described as of Jurassic age, and hence probably escaped the notice 
of Dr. E. v. Mojsisovics,! for they do not appear to be mentioned in 
his comparatively recent work on the Upper Triassic Cephalopoda 
of the Himalayas; nor do they seem to have been mentioned by 
Stoliczka? in his revision of all the known fossils from that district. 
Blanford characterised the species as a very variable form, but the 
two figured specimens appear to be specifically distinct, and although 
both are referable to the same section Juvavites of Mojsisovics, one 
(No. C. 5,050) belongs to the subgenus Griesbachites and the other 
(No. C. 5,046) to the subgenus Anatomites of the same author. We 
have reserved Blanford’s name for the original of his figs. la@ and e¢, 
and have given a new name—Juvavites (Anatomites) expansus—to the 
original of his fig. 14. In his description of Ammonites robustus, 
Blanford gave the dimensions of three examples which he designated 
a, b, and ¢ respectively ; 4 and ¢ are evidently the two figured specimens 
just referred to. Now there is in the British Museum (No. C. 6,790), 
and forming part of the Strachey Collection, another specimen (from 
Lakhur, Niti Pass) labelled Ammonites robustus, the dimensions of 
which lead us to conclude that this is the example which Blanford 
designated a. It differs, however, so much from the other two 
examples that we regard it as specifically distinct, and propose for 
it the name Juvavites (Griesbachites) Stracheyt. 
Descriptions of the three species are appended. 
* In 1855 F. v. Hauer * described under the name Ammonites robustus 
a species from the Trias of Hallstatt, but Strachey’s specimens are in 
no way related to that species. 
1. Juvavires (GRIESBACHITES) RoBUSTUS (Blanford). 
1865. Ammonites robustus (pars), H. F. Blanford: in J. W. Salter & 
H. F. Blanford, Paleont. Niti, p. 85, pl. xvi, figs. la, ¢ 
(not 1b = Juvavites (Anatomites) expansus). 
Shell discoidal, involute, somewhat inflated; greatest thickness at 
about the middle of the lateral area, nearly one-half of the diameter 
of the shell; height of outer whorl rather more than one-half of the 
diameter of the shell. Whorls (? number); inclusion almost complete ; 
umbilicus about one-ninth of the diameter of the shell in width, deep, 
with steep sides, and subangular margin. Whorl broadly oval in 
1 E. vy. Mojsisovies, ‘‘ Beitrage zur Kenntniss der obertriadischen Cephalopoden- 
Fauna des Himalaya’’: Denkschr. k. Akad. Wissensch. Wien, math. -naturw. 
Cl., Bd. lxiii (1896), pp. 575-701; and Pal. Ind., ser. xv, vol. ii, pt. 1 (1900 . 
2 Geological Sections across the Himalayan Mountains, from Wangtu-bridge on the 
River Sutlej to Sungdo on the Indus: with an account of the formations in 
Spiti, accompanied by a revision of all known fossils from that district. Mem. 
Geol. Surv. India, vol. v (1866), pp. 1-154, 10 pls. See, Table of Cephalopoda, 
pp. 149-163. 
3 F. v. Hauer, ‘ Beitrage zur Kenntniss der Cephalopoden-Fauna der Hallstatter 
Schichten’’: Denkschr. k. Akad. Wissensch. Wien, vol. ix (1855), p. 147, pl. u, 
figs. 1, 2; pl. iu, figs. 1-3. ; 
