294 PROCEEDINGS OF THE MALACOLOGICAL SOCIETY. 
outer whorl that is preserved formed part of the body-chamber. The 
specimen is broken transversely across the centre, the fracture revealing 
the dimensions and form of some of the inner whorls. It shows that 
up to a diameter of at least 40 mm. the periphery is broadly rounded 
and continuous with the sides, and that the whorls up to a diameter 
of more than 52mm. are wider than high, whilst before reaching 
a diameter of 80mm. the whorls are higher than wide. Its 
dimensions are :— 
mm. 
Diameter of shell ... b: 4 we ey 80 
Width of umbilicus... oe es dak 85 
Height of outer whorl ar ee ae 44 
Thickness of outer whorl ... sR ae 89°5 
The specimen, being broken transversely across, allows us to give 
the thickness and height of the whorl at various diameters, thus :— 
Diameter? 2.< 4... 02 9 ia col » Ss 26 72s, lo rome 
Dhicknesss.. acto OO yess) 200 Pee. Oe ee ole 
Height of whorl:,. 26°5..... 19:5 7... 12) 22") 9: 
Type.—B.M. Coll., No. C. 6,790. 
Horizon and Locality—The specimen formed part of the Strachey 
collection from the Himalayas, and when transferred to the British 
Museum collection from the Museum of Practical Geology, Jermyn 
Street, was labelled ‘‘ Ammonites robustus, Oolitic, Niti Pass.’”? The 
specimen bears in ink the name ‘“ Lakhur,”’ with the figures ‘‘ 28” 
under it. Mojsisovics records three examples of his Griesbachites 
Hanni from the ‘‘ dark slaty limestone of the Daonella beds of Lauka,”’ 
and this is probably the horizon and locality which has yielded the 
present example. 
Two species of this genus have been described from the Himalayas, 
viz., Ammonites Medleyanus, Stoliczka,! and Grvesbachites Hanni, 
Mojsisovies;? the present species differs from the former by its 
prominent ribbing even on an internal cast, and from the latter by 
its smaller umbilicus, its more distinctly bifurcated ribs, and fewer 
nodes at the margin of the periphery. 
” 
” 
3. JUVAVITES (ANATOMITES) EXPANSUS, Sp. NOY. 
1865. Ammonites robustus (pars), H. F. Blanford: in J. W. Salter & 
H. F. Blanford, Paleont. Niti, p. 85, pl. xvi, fig. 1b (not 
figs. la, ¢ = Juvavites (Griesbachites) robustus). 
Shell rapidly expanding, inflated; greatest thickness at the 
umbilical margin, about five-sevenths of the diameter of the shell; 
height of outer whorl nearly one-half of the diameter of the shell. 
Whorls few (? number) ; inclusion almost complete; umbilicus narrow, 
1 F. Stoliczka, ‘* Geological Sections across the Himalayan Mountains,’’ etc. : Mem. 
Geol. Surv. India, vol. v, p. 54, pl. iv, fig. 5. E. v. Mojsisovics, ‘‘ Beitrage 
zur Kenntniss der obertriadischen Cephalopoden- Fauna des Himalaya’? : 
Denkschr. k. Akad. Wissensch. Wien, math.-naturw. Cl., Bd. Ixiii (1896), 
p- 605, pl. x, fir. 2. 
2 E. vy. Mojsisovics: op. cit., Bd. Ixiii (1896), p. 607, pl. x, figs. 3-5. 
