BIHAXG TILL K. SV. YET.-AKAD. IIANDL. BAND. 28. AFD. IV. 3Sr:0 8. 19 



description of these organs has been prepared by Tiedemanjst 

 1817.^ On tlie other hand, Gegenbaur's statement reminding 

 one of Cuvier's^ must be regarded as erroneous when he re- 

 gards the coecum of Igiiana as a definite organ itself into 

 wliich tlie »Mitteldarra j and tbe »Enddarm» open. The latter 

 opeuing shoiild be the aperture in the middle of the first 

 diaphragmatic sphincter. But this is, as is recorded above, 

 situated a good deal below the ileocoecal valve and being 

 only a specialized coiic valve has nothing to do with the 

 coeenm as an organ (conf. also below). 



Brachylophus fasciatus Broxgn. 



Distance from snout to vent 1.% iiiiu. 



The length of the ventricle is a little more than 7 era. 

 It is sausage-shaped, a little flattened, and filled with large 

 pieces of leaves. The length of the small inte.stine is abont 

 185 mm. The beginning of the colon forms, together with 

 the coecum, a large and wide säck which extends about one 

 cm. from the opening of the ileum in a ccecal direction. But 

 right across at the height of the ileal opening this coeco-colic 

 säck measures almost 3 cm. in width. About 3 cm. from the 

 blind end the colon is narrowed to a rectum which, however, must 

 also be regarded as rather wide, being about 1 cm. in width. 

 The entire length of the large intestine, coecum included, is 

 about 7 cm. Valvtila ileocoecalis is conspicuous but not much 

 developed. About half a centimetre from the same, the colon 

 is provided with a large diaphragma-like septum or valve 

 situated as in Iguana. This first nearly circular valve is 

 about 12 —15 mm, at its highest place at the mesenteric side, 

 on the opposite it is only little developed and thus compara- 

 tively less effective than the corresponding one in Iguana. 

 As in this latter lizard Brachylophus is provided with semi- 

 lunar colic valves but three in number below the one just 

 mentioned. The foremost of these is about 1 cm. deep, the 

 two following decrease still more in size and height as well 

 as breadth. The distance between each valve and the following 

 is subequal about \ 2 cm. The transversal width of the pocket 



1 Deutsch. Arcli. f. Physiol. (Meckel). Bd. III. Halle u. Berlin 1817. 

 - Gegenbaur: Vergl. Anat. d. Wirbelth. Bd. II. Leipzig l'J(Jl. 



