298 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
Fig. 
ig. 46. 
AT. 
. 48. 
. 49. 
. 60. 
51. 
53. 
54. 
55. 
56 
DR. J. MURIE ON’ THE ORGANIZATION OF THE CAAING WHALE. 
Piece of the colon, displaying a pouched character: S.g7, some of the solitary 
glands. 
A segment of the unopened bowel, intended to display the comparative narrow 
diameter of the gut as it approaches the rectum, and the appearance of the 
mucous folds and surrounding intestinal wall. 
A portion of the rectum, cut open, showing the rugz, the narrow anal aper- 
ture and thick sphincter ani muscle (Sph) in transverse section. 
PLATE XXXV. 
Heart and commencement of great vessels, partially enveloped by the inflated 
lungs. A bridge of fibrous membrane, conjoined to the diaphragm (J), 
unites the rear sternal angles of the lungs, and it encloses a pair of glands 
(gl): a small strip of the pericardium (pe) is seen above. pa, pulmonary 
artery ; ao, arch of aorta; 2, i*, right and left innominate trunks ; m, mammary 
artery; 7, pulmonary lobule. 
Superficial view. Segment of sterno-ventral corner of left lung, and special 
gland, &ce. LL, lung covered by (p) the pleura, which has been removed from 
the semilunar line towards (g/) gland, and exposing a series of convergent 
vessels (these, a+v, are partly serpentine in course); phv, phrenic vein; 
sph, superior phrenic vessels; ph, phrenic nerve; pe, portion of pericardium 
attached to (D) diaphragm. 
Deep or posterior view of the parts figured in fig. 50; the internal mammary 
vessels, however, are not shown. 6, bronchus. Other letters as in the pre- 
ceding figure. 
Upper view of the septal segment of the bicuspid valve of the heart of the 
female Globiceps, exhibiting an auxiliary valve: s, septal valve; * and the 
arrow point to the abnormal perforation. 
Interior view of the same, auriculo-ventricular opening, the under surface of 
the septal valve, and its fleshy cords; also the supplementary orifice and its 
tendinous cords. One arrow denotes the blood’s usual flow towards the 
right ventricle. The second starred (*) arfow passes through the orifice in 
the septal segment (iS). cc, columna carnea; ct, chorda tendinea, and cf*, 
supplementary chorda tendinea belonging to the secondary valve. 
A lumbar vertebra of the Pilot Whale, to show (Sp.pa) Section of the spinal 
plexus of vessels; the large orifice is a vein, the smaller chiefly arteries. 
sp.c, spinal cord; Z.pa, lumbar arterial plexus or rete mirabile; c, centrum 
of the vertebra; ¢, transverse, and s, spinous process; z, zygapophysis. 
Section of intercommunicating venous network. 
. A transverse section of the penis of the Razorback Whale (Physalus anti- 
quorum, Gray, =Balenoptera musculus). 
