CATALOGUE OF THE CETACEA. 305 
Breadth of beak at three-quarters its length from base 6 .00 
Breadth of maxillary at three -quarters its length from base 1 .50 
Breadth of preniaxillary at three -quarters its length from base 1 .25 
Length of lower jaw in a straight line 47 .00 
Height at coronoid process 6 .00 
Length from posterior end of condyle to coronoid process 7 .50 
Height of ramus at middle 4 .00 
Amount of curve 6 .50 
Length of otic bullae 3 .50 
The thinner edges being covered with dry membranes, have been somewhat gnawed by vermin. 
Family Bal^enidje, Gill, p. 98. 
Genus Balsena, Gray. 
Balcena, Gray, 18G6, p. 78. 
Eubalcena, Gray, I860, p. 78. 
Balaena Sieboldii. PI. xii, fig. 1. Baleen, p. 55. 
Eubalwna Sieboldii, var. Japonica, Gray, 18C6, p. 97; 1871, p. 43. 
Bahvna cullamach? Cham., Cope, Proc. Phil. Acad. 1869, p. 15; Scammon, 1. c, p. 38, 
fig. 4. 
Pacific Right Whale, of Scammon. 
Arctic, Bering, and Ochotsk Seas. Lower California. Japan ? 
The Eubalcena Sieboldii was founded on a drawing of a Japanese clay model, named B. australis 
in the Fauna Japonica; and the supposed variety Japonica, from baleen from the North-west Coast. 
The description properly rests upon this baleen, as the former basis is utterly insufficient for the 
introduction of a specific name into a scientific system. The figure of the baleen agrees with the 
baleen of the Eight Whale of Scammon, and I have little doubt that they belong to the same 
species. The name Japonica had previously been used by Lacepede, and is, to some extent, a 
misnomer, so I have preferred to retain the original name of Gray. This species is doubtfully 
referred to the B. cullamach of Chamisso, by Cope ; but it does not, as he observes, possess the 
recurved rictus attributed to that species, which itself rests upon no scientific foundation, and 
hence I have preferred to use a name for which there is some slight basis in the shape of speci- 
mens by which the species may be hereafter satisfactorily identified. It reaches the length of sixty 
feet, is dark colored above and lighter below. Baleen in B. M. and Mus. S. I. 
Cyamus lentator, Dall, and C. gracilis, Dall, are parasitic upon this species. 
Balaena mysticetus.* PI. xi, fig. 1 ; baleen, p. 55. 
B. mysticetus, Linn., S. N. i, 105; Gray, 186G, p. 81; 18G8, p. 1, pi. 1, f. 4 (baleen); 
1871, p. 38; Cope, Proc. Phil. Acad. 1869, p. 15; Scammon, 1. c, p. 33. 
Boxohead, of Scammon. 
Bering, Ochotsk, and Arctic Seas. 
The Cyamus mysticeti, Dall, pi. x, fig. 2, is parasitic on this species. 
? Variety Roysii. Page 56, outline figure. 
Roys' Bunchback, of Scammon, 1. c, p. 35. 
Ochotsk Sea. 
No special differences appear to separate the Bowheads of these regions from those of the 
*Seo illustration of skeleton at the conclusion of this Catalogue. — C. M. S. 
Marine Mammals.— 39. 
