DR. J. MURIE ON THE OEGANIZATION OF THE CAAIXG "WHALE. 299 



u, urethral passage, surrounded by {cs) corpus spongiosum ; c.c, corpus cavernosum ; 

 t, trabecular glistening fibrous bands, and (/) fibrous tissue; v.v*, vense 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; Pc, 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. 

 Pc, Pc, panniculus, belly- and throat-portions; P.ma, pect. major; P.vii, pect. minor; 

 R.al, rectus abdominis; E.o, external oblique; <SV, sacro-coccygeus ; Ec-\-Isc, erector 

 clitoridis and ischio-coccygeus ; La.d, latissimus dorsi ; S, subscapularis ; Ch, cephalo- 

 humeral; St.m, stern o-mastoid ; Shy, stemo-hyoid; Sth, stemo-thyroid ; M.h, mylo- 

 hyoid; Gh, genio-hyoid: Stg, styloglossus; sk, skin; F, vulva; A, anus; v, caudal 

 vein. 



Fig. 59. Diagram to illustrate the superficial oblique bridging tendons of the tail of 

 Gloliceps, and how each superficial long dorsal muscle terminates in a single, 

 thick, apparently cordiform tendon. Sp.d-{-Lci, spinalis dorsi and homologue 

 of levator caudae intemus; Ld+Lce, longissimus dorsi and levator cauds 

 extemus. 

 Fig. 60. A transverse section of the terminal caudal tendons, and their fibrous (almost 

 cartilaginous) investment, of the Great Northern Rorqual (Balcenoptera mtis- 

 culus, —Physalus antiqv.orum). Prep. No. 45 E, Coll. of Surgeons. 

 The tendons (;;), 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 (/) 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 [t) the lateral compound or 

 vaginate tendons of the sacro-coccygeus; a, arterial channel beneath, and 

 piercing (/) the firm fibrous keel, overlain by {sk) the skin. 



VOL. VIII. — PART IT. February, 1873. 2 u 



