Pkterson and Gii.MdRE: Ei.osaurus Parvus. 491 



Class REPTILIA. 



Subclass DiNOSAURIA. 



Order Sauropoda. 

 Family MOROSAURID^. 

 Genus Elosaurus. 

 E/osaun/s gen. nov. 



T/iis genus may be distinguished from all the knoiuu Sauropoda by 

 the pubis, which inferiorly is greatly expanded antero-posteriorly with a 

 very prominent backward projection on the extreme posterior border of 

 the distal end. The anterior cervicals have a single square node-like 

 spine. The limb bones are solid. 

 Elosaurus parvus sp. nov. 



The sacral vertebra of this species are solid with the exceptioii of 

 three small pits extending down into the centra from their superior sur- 

 faces. The sacral rib attachments are very broad. The dorsals are 

 comparatively loiv and massive with a large neural canal. The oblique 

 position of the deltoid crest is characteristic. The proximal end of the 

 ulna is greatly expanded posteriorly. The small size of this individual, 

 together with the sutural articulations of the cervicals and dorsals to their 

 centra, in all probability can not be considered of generic or specific impor- 

 tance, though we have thought best to mention them in this connection. 



The type of this genus and species (No. 566) consists of the 

 scapula, humerus, and ulna of the right forelimb and the humerus of 

 the left, the right femur and left fibula of the posterior limbs. The 

 pelvis is represented by the distal end of the right pubis, while i)art of 

 a cervical and a complete arch of one of the dorsals together with two 

 sacral centra and the proximal ends of three ribs is all that remains of 

 the axial skeleton. The sacral centra, though found in close proximity 

 to the other l)ones, have a worn ajjpearance in comparison with the 

 otherwise well-preserved material and will, for the present, only be 

 provisionally referred to the type. 



Scapula and Forelimb. — Though resembling Morosaurus in general 

 outline the scapula is relatively longer and not so expanded superiorly, 

 though the extent of this expansion cannot be determined accurately as 

 a portion of the antero-superior border is missing. Medially the scapula 

 is constricted. Distally it again expands into a wide plate for contact 

 with the coracoid ; externally this plate i)resents a concave surface ter- 

 minating in a thin border anteriorly. This border in< icases in thick- 



