Cope.] i.b\) [April 5, 



transversely below between the bases of the parapophyses. The latter 

 are directed obliquely backwards at an angle of 45° from the articular 

 surface and are vertically expanded at the distal extremity. The parapo- 

 physes of the third cervical are as long as those of the second, but are 

 more slender. 



The humerus is of the size of that of the Cetotherium brialmontii, as 

 represented by Van Bencden, and has the moderately elongate form 

 characteristic of the species of Cetotherium so far as they are known. 

 The tuberosity and crest are broken off, but a portion of the smooth sur- 

 face which connects the former with the head remains. The distal end 

 is somewhat crushed and the olecranar facet is not as well distinguished 

 from the remainder of the ulnar facet as in most specimens. The humerus 

 is distinguished by two peculiarities. The crest ceases near the middle of 

 the length, and there is a wide and medially deep fossa on the inner side 

 of the shaft immediately beyond the line of the distal end of the crest. 

 Van Beneden figures a somewhat similar fossa in the Cetotherium hupschii 

 Van B., but in that species its position is more proximal and it is bounded 

 anteriorly by the distal portion of the crest. The other species of Ceto- 

 therium, and those of Balsenoptera figured by Van Beneden, do not 

 present this fossa. 



Measurements. m. 



Total length of fragment from line of paroccipital 870 



Axial length from occipital condyles to nasal bones, inclu- 

 sive 660 



Length on occipital bone from foramen magnum to apex of 



supraoccipital, inclusive (apex restored) 300 



Width of skull at paroccipital processes 820 



Width of skull at exoccipital processes 620 



Width of condyles and foramen 215 



Width of foramen inagnum 070 



Length of mandibular ramus to posterior foramen 680 



Depth of condyle and angle posteriorly 165 



Depth of posterior face of angle 120 



Width of posterior face of angle. 090 



Vertical diameter of condyle (axial) 078 



Transverse diameter of condyle (axial) 070 



Depth of ramus at last foramen (approximate) 140 



Depth of ramus 130 mm. anterior to condyle 110 



anteroposterior 080 



Diameters of otic bulla \ rot notch 048 



transverse ■{ 

 '^ t at process 0a5 



Length of epihyal 120 



( anteroposterior below 060 



Diameters of atlas \ r of centrum 224 



transverse-; .. „„„ 



^ (. do. with diapophyses 328 



Diameters of axis | anteroposterior below 040 



*. transverse in front 1 <2 



