1889.] 



THK BODY-CAVITY IN LIZARDS, ETC. 



465 



(c/. Plates XLVI.-XLIX. figs. 1-4 and woodcut A, p. 465), and 

 the membranes between the lung and liver are the pulmohepatic 

 ligaments. 



The ligaments of the right side and consequently the corresponding 

 recess is fuliy developed in the following genera : — 



Lacerta (yiridis, muralis'). Uromastyx. 



Iguana {tuberculata). Chamceleon. 



Gerrhosaurus {flavigularis). Sphenodon. 



Goniocephalus {sopkite). Trachidosaurus. 



In the last-named genus the posterior end of the lung is attached 

 by a separate membrane to the ligament between the liver and dorsal 

 wall. 



The Teiidae are the only family in which I have met with the 

 condition in which the lung of each side is suspended freely by its 

 more dorsal ligament, with a consequent absence of piibnohepatic 

 recess. 



This condition is visible in the following, which are the only 

 representatives of the family that I have examined : — 



Tupinambis (teguixin) {Tejus teguexim, Gray). 



,, (nigropunctatus). 



Ameiva {surinamensis) . 

 Callopistes {maculatus). 



The two types of lung-suspension referred to may be thus diagram- 

 matically represented ^ : — 



\pt// 



Fig. A. Diagi-ammatic section of one of the lizards included in the first list 



given above, taken through the lungs and liver. 

 Fig. B. A similar section of one of the Teiidse, mentioned in the second list. 



a, pulmohepatic ligament; «s, oesophagus; A, A', right and left liver-lobes; 

 m, median thoracic septum ; piil, lung. 



A second set of attachments of the liver frequently met with are 

 ventral ligaments that run outwards from the pericardium, or the 



1 It may be noted that two similar types occur among the Amphibia. 

 Thus, in the Salamander all the membranous attachments of the lungs and 

 liver seem to be precisely similar to those in the common Lacertiliaii type 

 {e.g. Lacerta). But in the Frog the two lungs hang freely suspended on either 

 side, as in the Teiidffi. 



