THE WHALEBONE WHALES OF THE WESTERN NORTH ATLANTIC. 291 
at Monterey, Cal., and which belongs to one of the specimens described in 1868 
(26, 226, 227); the British Museum contains a skeleton; and there is a skull in 
the museum of the California Academy of Sciences. 
The vertebral formula in the British Museum skeleton, according to Beddard, 
is C. 7, D. 14, L. 14, Ca. 21 = 56. Dall’s Monterey specimen No. 1 had the fol- 
lowing: C. 7, D. 18, L. and Ca. 28 plus those concealed in the flukes. 
SKULL. 
The peculiarities of the skull can be best understood from the figures on pl. 47, 
which represent the Monterey specimen in the National Museum, This same skull 
was figured by Van Beneden in 1877 (6, 96), from photographs furnished him by 
the Museum. Most striking are the rugosities of the occipital, the large size of 
the nasals, the shortness of the nasal portion of the intermaxillee, and their great 
depth anteriorly, the overlapping of the orbital process of the frontal by the proxi- 
mal portion of the maxilla, and the strong tubercle on the posterior margin of the 
former. All these characters are seen equally as well developed in the skulls 
figured by Malm (67) as in the Monterey specimen. 
These and many other characters stamp it as a very distinct form, approaching 
closely neither Balena nor Balwnoptera. 
The following measurements are from the Monterey skull in the National Mu- 
seum, and the data given by Malm (67, 17-387). I am not positive that I have 
interpreted all of Malm’s measurements correctly. 
RHACHIANECTES GLAUCUS COPE. SKULL. 
oF. (fee lena sea oee lee 
Measurement. Se Bic ota 4 Ces sa 
S2eIS) | iesei | ce | Coie ies | ce es a 
s : Aa Zo re lye ro 
=| 
mm, mm. mm. mm. mm. mm. 
Total length from the tip of premaxilla to occipital 
Gomdyley(Strareht)s maresciors ose a1a: suatsicis emi serstere ers BAGA | sca || eae cteellll Meets iis 
Greatestubreadthigne <rewpevertareiever slate atstrccrtes the tenors 1041 | 1040 820 830 840 
LENIN Oi WORNAN Aer aGDeOe DUoDIebS SHO enoUG OOO RGA) Geos ey || porns 
Breactipsam eam ee vat PASC. sayatem aac anes cca 584 
ri 7h UN Beteob (chal Sipe Aereinneess Sottne pete REG? 
=) across) premaxille at/same point.).))..)- 1-1: 184 
Length of maxille from frontal border............ 1651 
Greatest breadth across maxille proximally........ 851 
Ldn OL jomawEbINES. soo bho sopdoudobesoun cond 2007 Hales 
Meemenasalsvinumediani lines saci1-atee enna {ol Ser cee || pd rico ||*ac.cona/ecies 300 
Breadthonmasals atranterlorenG jel) W9w MW coos || ooo || aco || cose 155 
Distance from anterior end of nasals to anterior end 
Chi Sijorpreceloalle akan aanodonnenodaacodeos daae 375 
Length of orbit, point to point (least)............. 165 
Mp mee palatine) hONES!). 2°) eyes atesitseranate dae 394° 330 
Breadth across anterior and of zygomatic processes 
OF SEMANTICS. son soansase noon ogne coo cooK hous 940 | 1000 790 | 750 
Breadth across anterior angles of orbital processes of 
(MOINES cdon e ntd ooo p Nae a eADToocend 6 hen becc 889 | .... 640 
Breadth across posterior angles of orbital processes 
Oi INOMIGNGs a Goaeulognpdodnndoouobs Gana beeoocos Ooi || Sidise 710 
‘Straight. Around the curves = 866 mm. ° The exposed portion. 
