Cope.] 104 [April 5, 



foramen is notched, and a shallow groove rises from its superior angle 

 and returns posteriorly as a shallow groove of the superior middle line. 

 This groove disappears in a small median foramen, the first of the series 

 of small foramina of the inner side of the superior border. The foramina 

 of this series are small and represent the exits of narrow canals which 

 run horizontally inwards so close together that a fractured surface pass- 

 ing through them resembles a sutural surface with oblique grooves. 

 From a median superior position they assume an internal lateral posi- 

 tion, and disappear at about the posterior third of the ramus. The inner 

 face of the ramus above these foramina becomes slightly concave. Tlie 

 large external foramina are rather numerous and are situated at intervals 

 of about 45 mm. They are situated posteriorly about as far below the 

 superior edge as those of the internal series, and they retain that position 

 anteriorly, not rising to a higher position, as is the case with those of 

 the internal series. Posteriorly the internal face becomes slightly con- 

 cave next the inferior border. The posterior part of the ramus is strongly 

 concave on the inner side, and is thin walled. The base of the coronoid 

 process indicates that it is flared outwards. 



The condyle is a vertical oval tapering more gradually upwards than 

 downwards. The superior border of the ramus is thin and curves strongly 

 inwards, quite as Van Beneden has restored the corresponding part in 

 the M. agrami. This condyle diilers from that of the M. agrami in 

 having a less transverse extent, especially on the inner side, and in lack- 

 ing the transverse ridges and grooves described and figured by Van 

 Beneden (PI. ii. Fig. 10). This is the only part of the two animals 

 which is present in both specimens ; and the comparison indicates that 

 the species are diflferent. 



I have probable vertebrae of this species, but I cannot yet associate 

 them with certainty. A first dorsal was found in immediate contact with 

 the posterior part of the ramus. This resembles considerably the corre- 

 sponding vertebra of the M. agrami described by Van Beneden. It has 

 lost its epiphyses, but if these were added, its anteroposterior diameter 

 would be less than that of the latter, and there is not nearly so conspicu- 

 ous a facet for the head of the first rib. This is very indistinct in my 

 vertebra. A perfect humerus was also found near the position from which 

 the second and third rami were dug out. Until I know the proper 

 relation of this humerus I will only describe it so far as to say that it 

 has the proportions of that of Cetolherium, but that the tuberosity is not 

 produced beyond the head, and the olecranar facet is not distinguished 

 by an angle from the remainder of the ulnar facet. 



