

Dissection of a Batrachian Animal in a living State. 325 



20 Ascidia tetraodon, Josephine's island, Napoleon's land. 



21 peniformis, Port of King George, Nuyt's land. 



22 australis, Oyster bay, in Maria's island. 



23 lit/ioidea, Leuwin's land. 

 24- nigrita, Edel's land. 



25 rizophora, Napoleon's land. 



26 anthropocephala, St. Francis' and St. Peter's islands 



and port of King George. 



27 nasuta, north-west coast of New Holland. 



28 democratica, St. Francis' and St. Peter's islands. 



29 verrucosa, King's island. 



30 polystoma, do. 



LIV. Dissection of a Batrachian Animal in a living State. By 

 Richard Harlan, M.D. Professor of Comparative Anatomy 

 to the Philadelphia Museum.* 



THE specimen was sent from Georgia to Dr. Mease of this 

 city. An account of a similar animal has lately been 

 published under the name of " Chrysodonta larvceformis\." 



Having of late been familiar in the dissection of Proteiform 

 animals, " les reptiles douteux" of Humboldt, and having 

 had the opportunity of observing and dissecting this specimen 

 in a living state, I experience less hesitation in making the 

 following observations, more especially as the account alluded 

 to above is by no means free from imperfection and error. 



The animal I dissected was eighteen inches in length (see 

 Plate V. fig. C) ; the branchial cartilages are four in number, 

 united to each other at their inferior end, but unconnected 

 with the other parts of the skeleton ; the branchial orifice is 

 situate between the two inferior; the other cartilaginous slips 

 are covered by the internal lining membrane : these orifices 

 cannot be considered as connected with the process of respi- 

 ration, are by no means breathing-holes, not being furnished 

 with membranous fringes, and would appear to subserve no 

 other purpose than to evacuate the water taken into the mouth 

 with the food of the animal. 



The nostrils are small and situated near the point of the 

 snout, they communicate with the fauces, opening immediately 

 behind the palatine row of teeth. 



The lower jaw (fig. D. /3.) contains a single row of teeth of 

 about thirty in number ; the upper jaw contains a row on the 



• From the Journal of the Academy of Natural Sciences of Philadelphia, 

 vol.iii. No. 2. for May 1823. 

 f Vide Medical Recorder, July ia, r >, No. ID. 



maxrHaries, 



