144 THE WHALEBONE WHALES OF THE WESTERN NORTH ATLANTIO. 
The most frequent formula for mature individuals, or those above sixty feet, 
appears to be—II., 4; IIL, 6; IV.,5; V., 8. The Albany (New York) and Storno- 
way (Scotland) specimens have this formula. The Gloucester (Massachusetts) 
specimen is the same on the right side, except that the fifth finger has one less 
phalanx. There is, therefore, no ground for the specific separation of American 
and European specimens on the basis of the segmentation of the digits. 
PROPORTIONS OF THE SKELETON, 
The number of European skeletons of BL. physalus of which there are detailed 
measurements on record is not so large as one might expect, considering the numer- 
ous instances in which specimens have stranded on that side of the Atlantic. Com- 
panyo’s Monographie Ilustrée is not accessible to me, but I have consulted the data 
furnished by Flower, Murie, Sars, Van Beneden, Struthers, Malm, and others. Such 
of the measurements of different specimens as are comparable are reduced to per- 
centages of the length of the skull, and brought together in the following table, 
with similar measurements of some American specimens, including the type of ZB. 
tectirostris (Cope) : 
BALAANOPTERA PHYSALUS (L.). EUROPEAN AND AMERICAN, SKELETON. 
| = a 4 ret = 
° eS KG = 8 a Ot . Piss) x 
Be S mee, | 5 cles Es tale: Bo ae z 
Ass 222 | ss Aas ge 23 er ae iene 
Bom Za avi-) -W 00 S EA =} we ts 
of AOle ||) eae as oa Bey Sur ~o 22 
auo Bee | se one -o as Pa PSs -9 
Bes | uss | wa EE | ge $7, os o2 SIS. 
ein | S25 | GS | 82S | Be ae 26 oog rs 
<q wa ra Cle An, ae ou S0H Ey 
= & 
Sex and age............- 6 ad. Stade lloseaae $ ad $ ad. ad 2 Ro | aoooooae 
Total length of whale.....|...... Fr Veneers 60' 0" | 50’ 0” Ci ChY Wisagene 5 AV IN Nr osénec 47’ to 48"! 
us re SWskeletom ..)|/(66' 0' "67 61" G0) TOR ence |i scien 62 Oi ate eee | Reese tne Ae Gp NW eAInG yas 
Length of skull (straight). . 186" 184" 180" 168" 145.0" | 192.0''* | 189.5" T4q" 125" 121" 
4 4 | ¢ % % % fe % % & 
Greatest breadth of axis. . 23.1 BAKO! allie aces 25.0 ohn |arecdeo n> 23.2 20.3 20.4 20.7 
Depthyofibody of axisy sre <el| errs ||| eres Ie auch 5.4 (LW See cica.s'c | 4.8 4.6 4.8 5.8 
Greatest breadth 1st dor- 
SHS cronies hekuveree sales she orl eekeraic oes || Pardvateiees Ieen lavse 19.0 TSA") |eeice etek 17.4 18.0 18.1 18.8 
Depth centrum Ist dorsal..|...... | ..... eae Ey 4.4 whe dpeicts | 1-7 5.2 5.8 6.0 
Greatest breadth Ist lum- 
et oecmeksccickrse, octoetall) qonino Bens |) a Ke) PPP Neve CASI} IS aici cin 22.2 23.5 25.6 26.5 
Depth centrum Ist lum- 
OL Eee anon aera chee ke omental | hp... 5.1 nie G20%8 7 |t-e, iererets Bae 5.9 6.2 6.4 
Greatest breadth Ist cau- 
CEM 655 BoscouDsesnolloodoa> [kane gc PT ON NGCHE I osiodacs |ooneed Osa MQH2ioN ll tors seetsrenes 
Depth centrum Ist caudal..| ...... | .....- | 6.4 6.8 EO iad lhetrecereter cia tayll oPecalerons 6.8 7.6 7.6 
Greatest lengthofsternum..| 11.2 Were Nl anogde 10,1 Brahe arteries 8.9 8.9 a2en | |\Paromtersers 
Soeibread thi sae so eer STO Mace | |e atevers 13.1 2iOy, li eeemrcresercts 13.9 10.9° M27O% ll eee 
ss oe ““scapula..| 27.4 BELO |liireip = 27.9 27.0 26.0 27.9 24.1 25.6 27.1 
Seaceptivens op | Se ONG 16.8 15.9 16,1 15.5 16.1 16.4 14.3 16.0 16.1 
Length of radius.......... 17.0 Weel “\lonceen |loooned 17.9 17.5 17.4 16.2 17.6 19.9 
Bs “ulna (extreme)...| 19.3 Nes} |) Soaooe. hepa 18.6 !° 18.5 19.0 18.0 18.4 18.4 
' Straight. ° This is tbe 38th vert. ; the 36th = 19.0 4%. 
27 inches are added for last 3 caudals, which are probably missing. 1 This is the 38th vert. ; the 36th = 18.4 4. 
351 in. added for premaxillz. *Vert. No. 36. 
4od lumbar. * Broken. 
5 Vert. No. 38. 10 91 inches added for olecranon. 
