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Transactions of the Boyal Society of South Africa. 
senting the lingual of the frog and distributed to the floor of the mouth ; 
(2) a carotid (C) to the neck and head ; (3) a muscularis (AM) to the 
ventral body-wall. This last artery should be noted, since it is not 
present in the frog whereas it is a large and important vessel in Xenopus. 
The systemic trunk gives olf (1) a mandibular (M) to the roof of the 
Fig. 4. — Diagram of arterial system. Carotid trunk: L — lingual ; C = carotid 
artery ; AM = muscularis. Systemic trunk : M = mandibular ; IJ = internal jugular ; 
Sc = scapular ; Cut = cutaneous ; Br = brachial ; Sp = splenial ; Mes mesenteric ; 
E — renal (1st pair also to reproductive organs) ; IL ^ iliac ; Pel = pelvic ; FI = artery 
to dorsal, anterior part of leg ; Cut — cutaneous ; Fern = femoral ; Ves — vesicular ; 
P = pulmonary. 
mouth and the cranium ; (2) an anonyma which branches into {a) an 
internal jugular (IJ) to the cranium ; {h) a scapular (Sc) to the pectoral 
girdle ; (c) a cutaneous (Cut), and {d) a brachial (Br). The brachial has 
a few small branches to the skin of the limb. 
The pulmo-cutaneous trunk (P) has the usual pulmonary and cutaneous 
branches, but the latter, as already mentioned, is very small and leaves 
the pulmonary artery after the latter has entered the lung. 
