. Synopsis of the extinct Batrachia, Reptilia and Aves of North America . a. The rapid diminution in dimensions of the cervical series in Cimoliasaurus indicatesa short neck, and far less slender general form. Leidy suggests from the absenceof sacral characters, that posterior limbs have been probably wanting in this genus: thesame vertebral characters are seen in Elasmosaurus, but it has a large pelvic and scapulararches; the presence of limbs in it cannot be doubted. The femur of Cimoliasaurus isdescribed below, and is the only limb bone yet assignable to a species of this genus. Itresembles
. Synopsis of the extinct Batrachia, Reptilia and Aves of North America . a. The rapid diminution in dimensions of the cervical series in Cimoliasaurus indicatesa short neck, and far less slender general form. Leidy suggests from the absenceof sacral characters, that posterior limbs have been probably wanting in this genus: thesame vertebral characters are seen in Elasmosaurus, but it has a large pelvic and scapulararches; the presence of limbs in it cannot be doubted. The femur of Cimoliasaurus isdescribed below, and is the only limb bone yet assignable to a species of this genus. Itresembles that of Plesiosaurus. It is thicker and shorter however than in any species ofthe latter genus, and is quite short. The distal extremity is thick, and presents pits forthe attachment of the articular cartilage; the faces for both ulna and radius are extensive,and indicate a large manus and elongate limb. The rotundity of the head indicates ex-tensive rotation; and we may be satisfied that the animals of this genus were furnished AMERI. PHILOSO. SOC -VOL. XIV. 11 42 THE E
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Keywords: ., bo, bookcentury1800, bookdecade1860, bookidsynopsisofextinc00cope
