DR. J. MURIE ON THE ORGANIZATION OF THE CAAING WHALE. 276 
from the fourth backwards. Rapp‘ and Stannius’ note a serratus anticus major in the 
Porpoise. 
The costal origin of the short, narrow, and thin latissimus dorsi in Glodiceps is from 
the seventh, sixth, and fifth ribs and spaces, about their middle; and the insertion is on 
the inner side of the neck of the humerus by thick fleshy fibres. In the Piked Whale* 
it appears to come by aponeurotic expansion from the dorsal and some of the lumbar 
spines. According to Stannius‘, its costal attachment in the Porpoise is sixth to fourth 
ribs. I have noted in the same animal eighth to sixth; in the White-beaked Bottle- 
nose*, twelfth to sixth. 
The deltoid presents no feature of importance differing from that of Whales generally. 
Its scapular attachment might be mistaken for a supraspinatus, owing to the altered 
relation of the fleshy parts by absence of spine. According to my observation (vide 
fig. 70) the subscapularis covers the entire inner surface of the scapula with a capitular 
humeral insertion. Macalister’s® younger specimen showed eight tendinous intersec- 
tions, B. rostrata’ differing in this respect. We agree as to the capsule of the shoulder 
not being pierced by its tendon, and an absence of bursa. The supraspinatus in G. melas 
and L. albirostris answers the description of it in Phocena and Balenoptera as given 
by several authors. The infraspinatus fills the shallow scapular concavity behind the 
deltoid, its fibres running in an acute angle to those of the latter. 
In Globiceps, Risso’s Grampus, and the White-beaked Bottlenose, I have found but a 
single teres =teres major and teres minor. In one instance I met with duplicity of 
these muscles in the Porpoise, though Meckel’s*, Rapp’s*, Stannius’s”, and Flower’s dis- 
sections of this animal show it to be more commonly single. Fréd. Cuvier’s figure" of 
the shoulder-muscles of the Dolphin demonstrates a teres major and minor. But the 
former is evidently the infraspinatus, the latter the teres major, and his infraspinatus a 
portion of the deltoid. Macalister” avers of the young (Glodiocephalus, “there was no 
sign of a teres minor or teres major, which are present in Dolphins.” A teres major is 
recorded in the Piked Whale. 
The diminutive triceps has two heads of origin :—one, a narrow slip, from the neck 
and dorsal surface of the scapular over the teres, and which mingles with the panni- 
culus; the other, more tendinous, from the head of the humerus. In the same species 
(G. melas) Macalister’* met with only intersecting threads of fibrous tissue devoid of 
muscularity ; but he and Carte’ mention a tricipital division as obtaining in Balenoptera. 
Decidedly a triceps is present, but single, in Phocena, Grampus, and Lagenorhynchus. 
There is in Glodiceps a single, well-developed and fleshy coraco-brachialis, which 
’ Cetaceen, pp. 88, 89. aa cap ales 3 L.c. p. 224. “ Lc. p. 16. 
* L.c. p. 151. 6 P.Z.S. 1867, p. 481. 7 Phil. Trans. 1868, p. 226. 
® Op. cit. pp. 278 & 262. * Op. cit. p. 90. © Toc. cit. p. 14. 
" Cyclop. of Anat. & Physiol. vol. i. p. 571, fig. 256. 2 PZ.) 18675 ps SOL. 
* P.Z.S. 1867, p. 481. 4 Trans. Roy. Soe. 1868, p. 227. 
VOL. Vill.—ParT iv. February, 1873. 2k 
