1904.] AXATOMY OF THE LACERTILIA, 11 



It receives minute branches from the parietes throughout its 

 whole course to the liver. Contrary to what is found in most 

 Lizards, the portal vein joins the anterior abdom.inal at a long 

 distance from the liver, in fact about halfway between the origin 

 and termination of the vein. The system of veins of the bladder 

 is connected with the anterior abdominal. A median vessel 

 leaves the bladder anterioily and joins the undivided region of 

 the anterior abdominal. Another branch (? on each side) runs 

 from the hinder part of the bladder to the light anterior abdo- 

 minal behind the entrance of the fat-body veins. 



Suprarenal Portal Veins. — As a general rule, there appears to 

 be no distinct suprarenal portal system : the suprarenal body 

 receives branches from the posterior vertebral vein given off along 

 the course of the latter, which have been already referred to. But 

 on one side of one individual there were separate suprarenal 

 portals. This is illustrated in the accompanying drawing (text- 

 fig. 1, p. 8). On the right side of the body two veins collecting 

 blood from the parietes, instead of joining the posterior vertebral 

 vein, pour their contents directly into the suprarenal body of that 

 side. The more usual a.bsence of an independent suprarenal 

 system is to be explained, as I imagine, by the fact that the 

 suprarenal bodies are closer to the kidneys than they are in 

 some other Lizards, such as Iguana, where the suprarenal system 

 is quite independent. 



Dorsal Aorta and its Branches. — The subclavian arteries (text- 

 fig. 2, p. 12) spring from the right aortic arch, and I observed a 

 difference in two specimens dissected as to their mode of origin. In 

 the one the two arteries arose independently — that of the i-ight side 

 being anterior to the left. In the other specimen the two subclavians 

 sprang from a common trvink. Both subclavians give ofi^ vessels 

 to the parietes (shown in the drawing referred to). The right- 

 hand artery gives ofi" a single trunk which immediately divides 

 into two, one going to the parietes, the other supplying the 

 oesophagus and running there in company with a branch of the 

 azygos vein of that side, The left subclavian gives two branches 

 to the parietes following each other, which are not paired tubes 

 as is the case with the intercostals given ofi" from the aorta 

 itself. The right aorta gives off two pairs of intercostals before 

 it joins the left. The left aorta, on the other hand, gives origin 

 to gastric trunks, of which I counted three before the junction 

 of the two aortse. The gastric trunks of the common aorta arise 

 alternately from either side of that artery, and are disposed in 

 pairs supplying naturally each side of the stomach. There are 

 eight of these arranged in four pairs anterior to the origin of 

 the mesenteries. 



The intercostal arteries are for the most part strictly paired, 

 the two arteries for a given vertebra arising exactly side by side. 

 Occasionally, however, there is an irregularity, one of the two 

 arteries arising a little in front of the other. 



As is the case with most Lizards, the gastrosplenic artery 



