. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Figure 2. Diagrammatic representation of the sutures of specimens of Ofoceros woodwardi woodwardi Griesbach from O/o- ceras beds, Sfialsfial Cliff near Rimkin Paior encamping ground, Niti region, Himalayas. A, complete suture of specimen figured on Plate 2, figures 5-7 at a wfiorl height of mm, BM(NH) 28512; B, complete suture of specimen of Otocecas clivei (Diener, 1897, pi. 7, fig. 16; illustrated here on Plate 3, figure 12) at a whorl height of 25 mm, GSI 5963; C, complete left and right suture of specimen fig
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Figure 2. Diagrammatic representation of the sutures of specimens of Ofoceros woodwardi woodwardi Griesbach from O/o- ceras beds, Sfialsfial Cliff near Rimkin Paior encamping ground, Niti region, Himalayas. A, complete suture of specimen figured on Plate 2, figures 5-7 at a wfiorl height of mm, BM(NH) 28512; B, complete suture of specimen of Otocecas clivei (Diener, 1897, pi. 7, fig. 16; illustrated here on Plate 3, figure 12) at a whorl height of 25 mm, GSI 5963; C, complete left and right suture of specimen figured on Plate 2, figures 8-10, at a whorl height of mm, BM(NH) C28514; D, complete left and right suture of specimen figured on Plate 2, figures 13-15, at a whorl height of mm, BM(NH) C28513b. me, not even in the group of Diniirites S])ini))ljc(iti, are the variations so great as in ; Diener eoncluded that the sutures showed criteria by which species could be recognized, and proposed the following classification: Group of Otoceras woodwardi Griesbach O. woodwardi Griesbach O. parhafi Diener O. clivei Diener O. undatwm Griesbach Group of Otoceras fissiseUatum Diener O. fissiseUatum Diener O. draupadi Diener The basis for separating the two species groups was the presence or absence of small secondary lobes in one or more of the lateral saddles. The group of Otoceras fissiseUatum has such secondary lobes, whereas the species of the group of O. woodwardi do not have them. The place of intersection of the umbilical shoulder and the suture was used to further sub- divide the group of Otoceras woodwardi. In one of these subdivisions, which in- cludes O. clivei and O. parhafi, the first auxiliary saddle is divided by the umbilical shoulder. In the second subdivision, which includes onlv O. woodwardi, the first auxili- ary saddle lies outside the umbilical shoulder. Otoceras undatum was distin- guished on the basis of presence of wavy, lateral folds. Within the group
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