BIHANG TILL K. SV. YET.-AKAD. HANDL, BAND 28. AFD. IT. N:0 8. 43 



the contrary as in Hemidaciylus and Gcclco. In a similar 

 manner the average lengtli of the small intestine of the five 

 arboreal and slender Agamoids is 87 % of the standard and 

 in this case as Avell the deviation is not very great. In the 

 same way the comparative measnrement of the large intes- 

 tine of these lizards (with the exception of the aberrant Cel- 

 lotes tiimpanistriga) only varies between 27 and 39 % of the 

 standard. In the short and iiattened terrestrial Agamoids 

 the fignres are, in consequence of the general shape, different 

 so that in the insectivorons forms the small intestine is 95 

 — 100 % of the standard. In Agama which perhaps may live 

 on a mixed diet the corresponding fignre is 131 and so it is 

 also in the herbivorons Uromastix. The latter has, however, 

 a longer (not to count its width) large intestine than the 

 other species. In the insectivorons Iguanids (if the monstrous 

 Phryuosoiva'^ is exclnded) the small intestine is from 114 to 

 126 % of the standard, but the large intestine varies more 

 from 28 % in Änolis to 59 % in Tropid^irus. The shape of 

 these lizards is however a good deal diiferent and the diet 

 of the latter might be mixed (?). Among the herbivorons 

 Iguanids Brachyloplms is an exception from the rule, bnt 

 the others have a very long small intestine, varying from 

 180 \ to 291 Yo of the standard. The large intestine is also 

 very long from 88 to 143 % of the standard. Varanus which 

 is carnivorous has a small intestine of about the same rela- 

 tive length as an insectivorons lizard of its shape. It is 

 about 103 % of the standard and the large intestine is 58 fo 

 of the same. The figures representing the measurements of 

 the members of the next family Tcjidce are very instructive 

 because the shape of these lizards may be said to be typi- 

 cally the same and, so to say, the for a lizard normal one, 

 but at the same time the diet is different in different spe- 

 cies. The sarco- and carpophagous Tupinamhis teguixin has a 

 small intestine of nearly the same dimensions (95 %) as other 

 carni- and insectivorons lizards, but has a large intestine of 

 greater length (86 »ö) which no doubt is due to the vegeta- 

 tive part of the diet. Of the Tejids the insectivorons Cne- 



' The breadth of this animal is so great that its bulk full y corresponds to 

 that of a normally shaped lizard of the double length, and if the length of 

 head and body of Phrynosonia was twice that of what it is, the relation be- 

 tween the intestine and the body-length would be about normal for an insec- 

 tivorons lizard. 



