PART ‘2 ] (ifieshach : Fulteontoloffical notes, Lower Trias, Himalayas. 
1U7 
the drawings of lobes in Plate II, this species possesses a broad sii)honal lobe 
ending on both sides of the semicircnlar siphonal saddle in a sharp point. The 
external saddle (fig. 16) is moderately high and a little narrower than the siphon¬ 
al lobe. The first lateral lobe is the deepest of all, of the same width as the exter¬ 
nal saddle, and at the base shows iDlainly a tripartite arrangement of the 
serration. 
I remarked also that the corresponding lobes vary on each side of the specimen 
(fig. I). Whilst the first lateral lobe of the left side shows plainly this tripar¬ 
tite arrangement of serration, those on the right side have an additional sharj) 
point added to the lower margin of the lobe as shown in fig. 16. The larger 
specimen, fig, 4, shows a still more comjfiicated serration of this lateral lobe, 
similar also in figs. 3 and 5. There follows in all specimens a very large first lateral 
saddle, slightly bent towards the inner side, with following rather narrow second 
lateral lobe, sen-ated at the base, this serration varying in the different specimens. 
The second lateral saddle is only half as high as the first and great lateral saddle, 
rather wider in proportion to its height, and followed by one or two auxiliary 
lobes of varying course. In some specimens the first auxiliary lobe reaches only 
half down the rounded and broad second lateral saddle and is not serrated at the 
base and might be described as a rudimentary lobe; in others, figs. 26, 4 and C, the 
auxiliary lobes and saddles are similar in shape to the last lateral lobe and saddle, 
decreasing in size as they near the ridge (r), noticed above. Beyond tliis the 
sutural line runs in a series of rudimentary lobes and saddles to the sutural 
maro-in (s), where it forms a flat serrated lobe ; on the antisiphonal side I noticed 
on prepared specimens (fig. 6) a saddle, as broad as high, sloping towards the 
margin (s) followed by a narrower but deeper lobe, serrated at base, and a second 
hioher and wider saddle, similarly sloping towards the marginal side. The 
antisiphonal lobe is bipartite. 
Locality. —South of Rimkin Paiar and north of Kiunglang encamping ground, 
head-waters of the Ganges river. 
Otoceeas woodwaedi, var. undatum, n. s. Plate I, fig. 5. 
With the first described specimens and only at one locality were found a few 
individuals agreeing in general shape and lobes with Otooeras ivooclwardi, but, 
unlike even the larger specimens of this species, showing very marked wavy ribs, 
only very slightly bent forward near the siphonal margin, but swelling out near 
the middle of the side of the shell. As none of the other specimens show this 
character, I have thought best to separate it for the present as a variety of the 
other form. 
Locality, —South.of Rimkin Paiar, east slope of the Kurgudtliidhar mountain. 
Allied forms. —The ancestors of the forms above described must be sought for 
in the family of the Pinacoceratidm, Mojs., the oldest known ones of which 
occur in the Devonian of Oberscheld, Pinacooeras Sagittarius, Sandb.’^ That 
Sageceras, known from the Permian and which like Pimcooeras lived up to the 
^ Saudbei'ger : Scliichtcnsystcm in Nassau, p. 77. 
D 
