THE WHALEBONE WHALES OF THE WESTERN NORTH ATLANTIC. 87 
SIBBALDIUS TECTIROSTRIS COPE. (TYPE.) (Continued.) 
Cope’s My 
Measurement. measurements, measurements, 
is 1869. 1899. 
Transverse extent of centrum do. [3d cervical].............. 1.0 1.0 
Hengthyparapophysis sixth, cervicalvac«, jsccane cere ee 5.0 — 
Werticalidiameten centrum (5thi?)) dorsalis faite eee = 7.0 — 
ILC YhI NV COUN CLO co Ce ERC RaTa See aries OSI in COCO Oee 6.0 —' 
Vertical diameter centrum second caudal, with perforate dia- 
PO PMY SCS Hevetey tote crovs, sarees tenner erncin oto. aete cenreleeesauens obit 10.5 — 
ILEUM Che Cesaty oheny Cle sao eo oteOeno aoe Menaeenae wean en 10.5 — 
Height, spine and arch, middle lumbosacral................. 14.5 — 
“from floor canal to top anterior zygapophysis......... 6.0 — 
Scapa wantero-pOSteriors wiGtiil ris arse stetclsisltebesian stein: sie 2 33.0 33.0 
i VET ULC AWG tlie -ore.4; users 8 ss; secs areeheisin cherart Ree epee eis) aeeeole 21.0 20.0 
HWhenethvoteacrommO ner. cyecacrcces ccc a ss sissies ty sqsteeatatcre dle se seo Fh 8.0 
eMC OLACOLG G7 Ah creosc sissatase lors: dis s/s: ahee.Gis etanacareua scene’ eter 4.5 — 
Wirameteroterlen oid icaviltym rues eine selcleler yer ic eene edie 8.0 8.5 
LEME IN Of Genii (ESSE) Soo oagocesoooGounee GEdanooasou0Ee 126 in.” 121.0 
(Gireeiiest: Tall Gi Cooliris soug pepo aera ceocenSUbo ce nbooe: 43-0 — 
Widtheatysmpracrbitaleplatersierec.cs ociciiccis) cece score erro ciel 52.0 52.5 
peerOmeachnmaxillanyrat mid desea «acess orem ele cere 9-75 9-75” 
pane OfESHipkaorbitalsaboverorbite seen acces om aoe eee 13.0 120 
gee (least) rofsbrontallregionee. (asc ects ieee enter 0315 14.0 
Re OMAN ASA SHE ye eine nicperseisiays ie Gis 5s nica ee eee 4.3 6.25 ° 
smeinrenmaxillanesvatmiddlenass -semse.cmcecriecemaneer Bee 4.33 
Wenpethanasalle crc ac orate cerecsia ens ievajcie. «Stevo! onat evssterelaveveteternne.s 6.0 6.75 
eee xillanyabover ss .accce acta ta sends oe ne sare aameneeces 90.0 90.0 
SeEramusimandibuls (anicunve) an sen-4464s4e seer 120.0 120.0 
3 COKCOTONOId aaa eer eae eee 19.0 —" 
Depth  ~* 4 aticondylennaseccsicecmee actentace mores 8.5 — 
" e ACOTONOdanasctaeiaise a cmen aarneer 13.0 aH 
we a atid lek re cctaetatscctcteia sacar eyes 9.0 9-5 
enpthwotucybullatyecnp-terecieccvnae de eciaicis sevtamicesneucaiceies Eee — 
Length of longest plates of whalebone with gum......... sae 15.0 — 
Whiclfha dor atib ase nerticp.-tsyarccetets crerel evs sale ain, olay beeen eietenei nisi Sia 10.0 — 
It is, I think, proper to assume that the type of S. fectirostris is nothing more 
or less than a specimen of the “common Finback” of the Atlantic coast of the 
United States. Cope, at the time of original publication, was probably not in posses- 
sion of the fact that the Finback which strands most frequently on our coast is of the 
fashion of B. physalus (.). He considered his specimen most closely allied to S7b- 
baldius laticeps of Gray (= B. borealis Lesson), but, as might be expected, he found 
numerous differences. At a later date, in consequence of his own more extended 
studies, and the progress of cetology, he perceived that tectérostris was properly to 
be associated with, or might even be identical with, B. physalus. Cope also con- 
sidered his S. tuberosus allied to S. laticeps of Gray and for a time identified it with 
the latter species. But at the same time he pointed out two external characters 
by which he supposed it differed from fectirostris,—the form of the dorsal fin 
‘Not re-measured by myself. * Cope gives 120 in. on another page. 
* Tf the nasal process of the maxilla is taken into account; otherwise, 9 in. 
* This is the greatest breadth ; the least is 8.75 in. 
* This is the width at the distal end. Cope’s measurement was probably taken at the proximal 
end, for which it is correct. * The coracoid is broken. 
