86 THE WHALEBONE WHALES OF THE WESTERN NORTH ATLANTIC. 
“There is no neural spine on the second, third and fourth cervicals, and it is 
rudimental and small on each of the remainder. Those of the dorsals and lumbars 
are not particularly elevated. 
“The humerus is very short and thick, and the hand remarkably small. 
“The scapula, as in other Sibbaldii, has a considerable antero- posterior extent, 
and well developed acromion and coracoid. The disk is divided into three areas 
on the inside by two slight ridges.” 
“The muzzle is elongate, and with a narrow acumination. Each nasal is as 
wide as long medially ; anteriorly concave above, the line of junction of the two in 
one plane, forming a median ridge, which is prolonged into a prominent median 
point. The otic bulle are slightly compressed and carinate below, and their sur- 
face is not markedly rugose. The malars are in shape something like first ribs; 
that is, with an enlar eed head, with prominences imitating capitulum and tuberele, 
a short narrowed shaft, and expanded distal extremity. The distal third is occu- 
pied by an ovate ? articular surface, thinning out the margin on one side. The 
shaft is thin and concave, both longitudinally and transversely, on one side. 
“The inner margin of the palatine bones is regularly continuous with the 
short pterygoids, which are very short, and do not approach near the otic bull ; 
Rudolphi represents the latter as prolonged to beyond the extremity of the bulla. 
The posterior plate of the vomer in WS. fectirostris extends much further posteriorly 
than Rudolphi represents for S. /aticeps, and though there is no doubt some varia- 
tion in this respect in the same species, the difference here is considerable. In 
S. laticeps it extends to a little behind the anterior margin of the bulla; in S. 
tectirostris to behind the posterior margin, concealing much of the basioccipital. 
“The mandibular ramus is strongly curved, and very convex externally, less 
so internally. The vascular foramina are very large externally, and very much 
reduced in size on the inner face. The coracoid process is strongly elevated, curved 
outward, and acuminate. There is a distinct angular process below the condyle.” 
(83, 17-19.) 
I have verified the majority of Cope’s measurements, and give them below in 
the order in which they occur in the original, together with such differences as I 
noted. For purposes of comparison I shall repeat some of them later in a different 
order, with other measurements of my own taken in accordance with a particular 
system. 
SIBBALDIUS TECTIROSTRIS COPE. (TYPE.) 
Cope’s My 
Measurement. measurements, measurements, 
1869. 1899. 
t- 
Totalilength of skeletoni((restoxed)/po ae 14sec 45 ft. 7 in. : 
ene thor eranluun\seriattoieysoleiereterte ete reel rer eter tee ieee 120 1n.” 121 in. 
Rieishtiof centrumyandsarchiof axisaeet iain tie 12.25 12.25 
ed ST eentrum|[id Oa] seies Glemtevsee cist wera erecta eect oe 7.1 7.0 
Micansverselextent ot axisn ella eeiarereacioir iter nono OnooGomaC 25.0 25.0 
a . * centrum (Of dOmsac.oe 5 ss Career eee 11.5 12.0 
ue SU enenralicanalloador|inere saree cement Baa 5-75 
a P thirdlcerviGallyac tiie te «ss seiko meena 23.0 22.0 
‘ Not re-measured by myself. * Given in another place as 126 in. 
