376 Zoological Society :— 



The weight of the Uver was 28 oz. ; that of the spleen, 2 oz. 

 C drachms ; that of the pancreas, 2 oz. : the form and structure of 

 these viscera and of the gall-hladder were described. The renal and 

 generative organs were next referred to. 



The disposition of the pleura in the thorax, and the form and 

 structure of the thoracic viscera were detailed. A pecuharity was 

 noticed m the right auricle of the heart : the entry of the inferior 

 cava was guarded as usual by the eustachian valve, the hornologue 

 of the posterior of the two semihmar valves which guard the com- 

 munication between the sinus and the auricle in the heart of Rep- 

 tiles ; in the great Anteater there is a narrower valvular fold or ridge 

 on the opposite side of the orifice of the inferior cava, answering to 

 the anterior valve in the Reptiles' auricle, and a ridge is continued 

 from both valves in the Anteater, towards the opening of the supe- 

 rior cava. 



Of the salivary glands of the Anteater the submaxillary pair were 

 those most developed and modified to supply the unusual quantity 

 of adhesive saliva with which the long, slender and moveable tongue 

 is bedewed : these glands extended over the fore part of the neck 

 and chest, and were upwards of 16 inches in length and 2 inches in 

 thickness. 



The parotid gland retained its ordinary proportional size and rela- 

 tive position. The sublingual gland was represented by an exten- 

 sively diffused thin layer of follicles, opening by many small pores 

 upon the inner surface of the mouth. The labial glands were small, 

 as were also the tonsils. 



The muscles of the jaws were described. 



The cavity of the mouth is susceptible of great dilatation, and pre- 

 sents the peculiarity of being extended far back beyond the root of 

 the tongue. The author accordingly defines, in his description, a 

 postliugual and a prelingual part of the mouth. A hard longitudinal 

 cartilaginous ridge })rojects downwards into the mouth from the inner 

 side of each ramus of the jaw. The author conceives that the ter- 

 mites may be crushed by the action or pressure of the tongue against 

 those callous ridges, which seem to occupy the place of teeth, A 

 fossa descends between the cpihyals, which the author called the epi- 

 hyal pouch. The hyoid arch has no immediate connection with the 

 tongue, but is situated far behind the tongue, preserving its usual 

 relations with the larynx. 



The thyroid is ossified ; the cricoid and arytenoids are cartilaginous. 



The total length of the nasal passages is 22 inches, the last 8 inches 

 being muscular and membranous, and extended backwards beyond 

 the base of the skull, where the canals terminate in most other 

 mammals. 



The antero-])osterior diameter of the base of the tongue was 3f 

 inches ; it rapidly diminishes to a cylindrical form, with a diameter 

 of 8 lines, and is thus continued for 18 inches, gradually decreasing 

 to its obtuse apex, which is 1 line in breadth. This long cylindrical 

 tongue is comj)osed almost wholly of muscular fibres, and covered by a 

 smooth epithelium ; the only papillae are two fossulate ones (pcqnllce 



