Report of the United States Geological Survey of the territories . the same form of section, and the strong, large, lateral undu-lations on its non-septate part seen in II. grandis. Yet the two terminaldivisions of its first lateral lobes, instead of being long and merely digitate,are short and distinctly bifid ; the subdivisions being armed with sharp, pal-mately spreading (limitations, more nearly as we generally see in B. ovatus,with which it also agrees very nearly in the form of its antisiphonal lobe,and, indeed, in the details of its other lobes and sinuses. So we here havea shell agreei
Report of the United States Geological Survey of the territories . the same form of section, and the strong, large, lateral undu-lations on its non-septate part seen in II. grandis. Yet the two terminaldivisions of its first lateral lobes, instead of being long and merely digitate,are short and distinctly bifid ; the subdivisions being armed with sharp, pal-mately spreading (limitations, more nearly as we generally see in B. ovatus,with which it also agrees very nearly in the form of its antisiphonal lobe,and, indeed, in the details of its other lobes and sinuses. So we here havea shell agreeing in size, the form of its section, very large lateral undulations,and other external characters, with B. grandis ; and yet in the characters ofits septa corresponding much more nearly with B. ovatus. I am not pre-pared at present to decide to which of those species or varieties it shouldlie referred, nor yet to view it as a third species distinct from both Irather incline, however, to the opinion that it may lie only a very largeexample of B. ovatus. Fig. Baculites urandis (sections).Fig. f>3. The ovate inner figure represents the form of a section of a medium-sized specimen, some distancebehind tbe last septum ; the middle line represents the form of the section of the non-septatepart of a large specimen,measuring between the undulations; and the outer line that ofsame, measuring over tin- undulations farther forward. (Reproduced from the original illus-tration). 400 UNITED STATES GEOLOGICAL SURVEY OF THE TERRITORIES. Fig. 54.
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Keywords: ., bookcentury1800, bookdecade1870, bookpublisherwashi, bookyear1876
