236 THE WHALEBONE WHALES OF THE WESTERN NORTH ATLANTIC. 
MEGAPTERA NODOSA (BONNATERRE). EUROPEAN AND AMERICAN, SCAPULA. 
Locality. Length of Skull. 2a: ee ncaa 
in. 
Woyakercl Cesky. scosscodsccodon s9GdcKuDdEC 148.2 33-3 
COFIS: OF IMIBMINS sooo 0000060 oooh Sono nooDSsonDDOSS 135.0 33.2 
ANEK TOniere, SROWEIVG!  Coocoonboo edeoooooSonEadat 125.0 32.8 
Greenland! (und) Minsenm)) irae siete se ale 121.2 31.6 
West) Dries: Seteorn stad pevee rstecu siete aeke anes tliavere 114.5 Bitn2 
(Caine (Col IMEI (Oey) span nangcsHaesonanooaodc 113.0 31.8 
Provincetown p Mass (O25 2) ls merrsicteeener erect gI.o 30.7 
We find here, beautifully brought out, a gradual increase in the relative 
breadth of the scapula, with the increase in the size of the skull. Unless the 
series represented one species, it is hardly likely that this gradation would be 
obtained. 
The scapule of the types of JZ. bellicosa and M. osphyia, like that of the Tay 
River (Scotland) whale, show a low, blunt spine, a very narrow prescapular fossa, 
and a slight elevation on the anterior border (pl. 34, fig. 4; pl. 36, fig. 3). The 
anterior border is nearly straight, though somewhat irregular in the upper three 
quarters, while the posterior border is evenly concave. A rudimentary coracoid 
is discernible in the United States specimens, as in the Tay River (Scotland) 
whale, and in the Greenland skeleton No. 269 in the Brussels Museum. 
RADIUS AND ULNA. 
Struthers has published a figure (87, fig. 6) of the forearm of the Tay River 
whale, which shows well the shortness and strong curvature of the ulna and the 
expansion of the radius at the distal end, but hardly gives the impression of mas- 
siveness which these bones have. Malm published a figure (after a photograph) 
of the radius of a specimen in the Stockholm Royal Museum, received from St. 
Bartholomew Id., West Indies, where it was collected by Dr. Goés (66, fig. 4a). 
This last is comparable with the radius of the type of JZ bellicosa, which was 
also from the West Indies, and probably from St. Bartholomew Id., and was col- 
lected by Dr. Goés (see p. 97). The two radii are exactly alike, except that the 
Stockholm specimen appears to be a little narrower at the proximal end. 
The proportion of the breadth of the radius at the distal end to its length in 
various American and European specimens of Megaptera is as follows : 
Ane ON AA dane (Paley, INDUS.) Soak po nconobsoonaooonesonK0cc0L 41.1% 
St. Bartholomew Island\ (Stockholm Mius:)/y. sj. eel siel-lteioieleletele rele ieial = 41.0%’ 
Type of M7. longimana (Berlin Mus.)...........0.00-+00rc-en-eees> 40.9%” 
Greenland (Copenhagent Mus)... -- oem sells faleteloe ielere lel ieee) 1-1 40.3 % 
Greenlandai(Brusseles Miss) emer seyeeie cinete eierle eitaetetettenetonerarererecele ate 38.7%" 
Type of Mf. osphyia\ (Niagara (MuIs.)i5.- 0-2). 2 )-cle)leereie elias leo alae= 38.2 % 
ay Rivers cotland (Dundee Muss) hese eer eee eel 35-38% 
‘The measurements of this radius given by Malm (66, 38) make the breadth at the distal end 
only 33 % of the length, but it is obvious by examination of the figure that the measurements are 
incorrect. The above proportion is from the figure, which is after a photographic original. 
* From the figure. 
