ON THE ANATOMY OF THE NORTHERN BELUGA. 435 
EXPLANATION OF PLATES. 
Puate VIL. 
Figure 1. Internal female organs of generation, } natural size. v. vagina; wu. uterus; ¢.w. cu. 
cornua uteri; ft. f¢. Fallopian tubes; «0.0.0. their abdominal openings ; 0. ovary ; 
r. rectum. 
Figure 2. Vagina and uterus laid open, $ natural size. o0.w. os uteri; vf. folds of vaginal 
mucous membrane. 
Figure 3. External female organs of generation, } natural size. . clitoris; /.m. labia minora ; 
n. nipple; v. orifice of vagina; a. anus. 
Figure 4. Stomach laid open. The figures 1, 2, 3, 4, 5 indicate the different cavities; w. ceso- 
phagus; d. duodenum; /. liver; Ad. hepatic duct; p.d. pancreatic duct. 
Figure 5. Exterior of stomach. The figures 1, 2, 3, 4, 5 indicate the gastric compartments ; 
@. cesophagus; d@. duodenum ; J. liver; p.p. pancreas. 
Figure 6. Spleen, about $ natural size. 
Figure 7. Kidney, ¢ natural size. 
PuatE VIII. 
Figure 1. Tongue and larynx. J. larynx; 7. tongue. 
Figure 2. Deep muscles of tongue and hyoid bone. Gg. genio-glossus; St.g. stylo-glossus ; 
ffy.g. hyo-glossus; My.hy. mylo-hyoideus; Th.dy. thyro-hyoideus; C.th. crico-thyroideus; 
St.th. sterno-thyroideus ; /.h. interhyoideus ; *. muscle described on page 411 of the text. 
Figure 3. Superficial muscles of tongue and hyoid bone. G\hy. genio-hyoideus; My.hy. mylo- 
hyoideus ; S¢.ry. sterno-hyoideus. 
Figure 4. Hyoid bone and laryngeal cartilages seen from below, about + natural size. Bh. 
basi-hyal; 7’. thyro-hyal; Ch. cerato-hyal; Sth. stylo-hyal; 7. thyroid cartilage ; 
C.C. cricoid cartilage. 
Figure 5. Blow-hole and nasal sacs seen from within, } natural size. B&B. blow-hole; W.S. WS. 
nasal sacs. 
Figure 6. Laryngeal cartilages, lateral view. -A. arytenoid cartilage; ZL. cartilage of epiglottis ; 
T. thyroid cartilage seen in section; C. cricoid cartilage. 
Figure 7. Trachea and lungs. 7. trachea; Z.Z. lungs; L.G. pulmonic lymphatic glands. 
