DR. J. MURIE ON THE ORGANIZATION OF THE CAAING WHALE. 299 
u, urethral passage, surrounded by (cs) corpus spongiosum; ¢.c, corpus cavernosum ; 
t, trabecular glistening fibrous bands, and (f ) fibrous tissue; v.v*, venze dorsales. 
PLATE XXXVI. 
Fig. 57. Body of the female G. melas, from which the skin and subcutaneous layer of 
fat have been removed, excepting on the tail, the pectoral fin, and an edging 
round the lips. Glistening fascia and fibrous tissue fill-in the areas unoccu- 
pied by the fleshy coat. ac, orifice of auditory canal; Pe, panniculus 
camosus. 
Fig. 58. Abdominal aspect of same specimen. The lower (left) half displays the super- 
ficial layer, the upper (right) half a deeper dissection. 
Pe, Pe, panniculus, belly- and throat-portions; P.ma, pect. major; P.mi, pect. minor ; 
R.ab, rectus abdominis; E.o0, external oblique; Sc, sacro-coccygeus ; Ee+ Isc, erector 
clitoridis and ischio-coccygeus ; La.d, latissimus dorsi ; S, subscapularis; Ch, cephalo- 
humeral; St.m, sterno-mastoid; Shy, sterno-hyoid; Sth, sterno-thyroid; Mh, mylo- 
hyoid; Gh, genio-hyoid: Stg, styloglossus; sk, skin; V, vulva; A, anus; v, caudal 
vein. 
Fig. 59. Diagram to illustrate the superficial oblique bridging tendons of the tail of 
Globiceps, and how each superficial long dorsal muscle terminates in a single, 
thick, apparently cordiform tendon. Sp.d+ Lci, spinalis dorsi and homologue 
of levator caude internus; Zd-+Lce, longissimus dorsi and levator caude 
externus. 
Fig. 60. A transverse section of the terminal caudal tendons, and their fibrous (almost 
cartilaginous) investment, of the Great Northern Rorqual (Balenoptera mus- 
culus, =Physalus antiquorum). Prep. No. 45 8, Coll. of Surgeons. 
The tendons (f), as in fig. 59, are packed or overlap one another, so as to seem but 
composed of a single one when viewed longways, and with their fibrous coat in situ. 
The (f) investing mass or cushion has interlacing glistening fibres, here and there 
penetrated by bloodvessels (a) &c. 
Fig. 61. Diagram showing the manner in which the tendons of the great inferior loin- 
muscle end in the Caaing Whale. Sc, sacro-coccygeal, secondary tendons 
dragged out; finally they enwrap (as above) in a sheath (sh) the thick com- 
pound terminal caudal tendon, whilst presenting continuity with the super- 
ficial fibrous layer of the tail. 
Fig. 62. Semidiagrammatic representation of a transverse vertical section of part of the 
caudal keel of the Caaing Whale. It shows (¢) the lateral compound or 
vaginate tendons of the sacro-coccygeus; a, arterial channel beneath, and 
piercing (f) the firm fibrous keel, overlain by (sk) the skin. 
VOL. ViII—PART Iv. February, 1873. 20 
