DR. J. MUEIE ON THE ANATOMY OF THE SEA-LION. 581 



Fig. 61, Hinder view of the larynx and its arytenoideus muscles ; the dotted outlines 



indicating the absent left thyroid cartilaginous moiety. Ar, arytenoideus ; 



P.c.a, posterior crico-arytenoid. 

 Fig. 62. Ventral surfaces, hyoid bones, thyroid and cricoid cartilages, and on opposite 



half the deep muscles connected therewith. H^ and H^, separate insertions 



of hyoglossus ; Mc, fibres of middle constrictor ; Thi/, thyroideus ; Cfh, cri- 



cothyroideus. 

 Fig. 63. Larynx and hyoidean arch, in profile. T, thyroid cartilage; C, cricoid; tr, 



trachea; c.^.Z, crico-thyroid ligament ; ?,lateralthyro-hyoid ligament; sJi, stylo- 



hyal, and ti/k, tympanohyal, its cartilaginous articulating tip ; eh, epihyal ; 



cth, ceratohyal ; bJi, basihyal ; th, thyrohyal. 

 Fig. 64. View from behind of the hyoidean arch and larynx. A, arytenoid cartilage ; 



S, cartilage of Santorini ; n, nodule in thyro-hyoid membrane. Other 



lettering corresponds with the parts in fig. 63. 



PLATE LXXXI. 



Fig. 65. Keduced view of the distended stomach, seen from behind, with the spleen, 

 vessels, and nerves in situ : 



OS, CESophagus, cardiac end ; p^/, pyloric end of stomach ; d, duodenum ; sj), spleen ; 

 h.a, hepatic artery cut short ; s.a, splenic artery ; v.b, trunk of one of the vasa brevia ; 

 c.a, cardiac artery ; g.es, gastric epiploica sinistra as it proceeds to inosculate with the 

 dextral branch. The veins not lettered follow alongside the arteries ; n, gastric nerve 

 other branches are seen distributed upon the surface of the stomach. 

 Fig. 66. A few inches of the Jejunum, with the mesentery attached, and showing the 

 intestinal subdivision and distribution of the superior mesenteric vessels : «, 

 artery; v, vein. 

 Fig. 67. Portions of the ileum and colon, with caecum coli and ramifications of the 

 ileo-csecal artery and vein : cce, caecum ; a, artery ; v, vein. The arrows indi- 

 cate the passage from small to great gut. 

 Fig. 68. Small piece of intestine (14 feet from pylorus), cut open to display part of 



broad elongated Peyer's patch. Pgl. Peyer's gland, about nat. size. 

 Fig. 69. A portion of the rectum, exhibiting its mucous membrane, of nat. dimen. 

 Fig. 70. A longitudinal section of the right kidney, sliced through a little to one side 

 of its middle. Of nat. size. The arteries, veins, and urinary tubes have each 

 different-coloured injection thrown into them, r.a, renal artery ; rv, renal 

 vein ; u, ureter ; * veno-arterial inosculations. 

 Fig. 71. Segment of the cortical surface of the same kidney, showing the arborescent 

 nature of its superficial vascularity. The darker stellate lines indicate chiefly 

 the veins. The undulate marginal periphery exhibits but slight lobulation. 

 VOL. VIII. — PAKT IX. June, 1874. 4 l 



