616 REPORT OF NATIONAL MUSEUM, 1898. 



bad opportimity to dissect, 1 have found no corpus adiposum, while this 

 structure is well developed on the forms with suprauasal plates. In 

 serpeiitiforin types, here as in the Anguidie, the liver is situated more 

 posterior to the heart, being- separated from it by an interspace, which 

 is not present in the strictly lacertiform types. I have only found a 

 colon in three types, the Australian Egernia major, a pea green lAole- 

 pisma from some part of the Australian realm, and a GhalcuJcs lineafufi 

 from Morocco. The Trdchysaurus rur/osus of Australia is remarkable 

 for the shortness and large diameter of its alimentary canal, the diame- 

 ter being similar all the way through, and the course being a simple sig- 

 moid. In all other genera there is a small intestine distinct from the 

 stomach and rectum, which is more or less plicated in its course. 



The characteristics which I have observed may be tabulated as 

 follows: 



I. No corpus adiposum. 



A, No small iiiteHtine; liver tliree-lobed. 



Middle lobe of liver superior to the others and produced into a long strip. 



Tracliysanriis. 

 AA. A plicate small intestine. 

 a. No colon. 



Liver adjacent to heart, two-lobed, right h)be little produced. 



A[ocoa,^ TUkjoci,- Huiidia.^ 

 Liver moderately posterior to heart; three-lobed, the right lobe pro- 

 duced Liolepisma {laferah). 



Liver well posterior to heart; liver two-lobed; right lobe produced; 



small intestine short, with only one fold of sigmoid Siaphos.^ 



aa. A colon (short and wide). 



Liver adjacent to heart, two-lobed ])osteriorly, right much prolonged. 



Liolepisma (green sp.), KgcrniaJ' 



II. Corpus adiposum pros^'ut, adherent to body wall. 

 A. A plicated small intestine. 



a. A colon. 



Ashortciccum; liver well posterior to heart, the right lobe much larger 

 than the left ; right lung longer than left Cltalcides.*^ 



III. Corpus adiposum free from the bodj^ wall. 



A. A plicated small intestine; no colon ; liver two-lobed posteriorly. 



Lungs ecpial ; right lobe of liver moderate; small intestine sinuous. .EumecesJ 



Lungs equal ; small intestine large and little sinuous Euprepcs.* 



Left lung or both lungs short ; small intestine contracted and short . . Mahuia.^ 

 The genera without corpus adiposum are inhabitants of the Austral- 

 ian zoological reabn, excepting the Central American Mocoa assata, and 

 the North and Central American Liolepisma laterale. 



' M. asaata Cope. 



- T. scincoides White. 



^ H. Ue.niolata White, and a second species. 



"• S. (vqualis Gray. 



^ E. major Gray. 



'' C. lineatus Leuckart. 



'' E. quinqueUiieatns LinnaMis and E. ohsolrtiis Baird and Girard. 



*jE. muUiJ'usciatiis Kuhl. 



" M. afjilis Raddi ; left lung shorter than right; M. aurata, both lungs short. 



