. Journal of anatomy. Indeed, inTejus Teguixin Brilcke (18) has reported a case in which they areentirely absent. No trace of it is to be found in Chamceleo vtdgaris, C. p^nnilus, , and C. tigris, but it is present in C. planiceps as a tiny ligamen-VOL. LI. (THIRD SER. VOL. XII.)—JAN. 1917. 10 144 Dr Chas. H. ODonoghue tuin visible with the aid of a hand lens. It appears to be lacking inVaranus ornatus, V. , and F. nUoticus, and also in Amphishvnaalba, A. ftdicjinosa, A vermicularis, and Lepidosternon microcej^halum. Kiikenthal figures ductus carotici in Lacerta agilis (
. Journal of anatomy. Indeed, inTejus Teguixin Brilcke (18) has reported a case in which they areentirely absent. No trace of it is to be found in Chamceleo vtdgaris, C. p^nnilus, , and C. tigris, but it is present in C. planiceps as a tiny ligamen-VOL. LI. (THIRD SER. VOL. XII.)—JAN. 1917. 10 144 Dr Chas. H. ODonoghue tuin visible with the aid of a hand lens. It appears to be lacking inVaranus ornatus, V. , and F. nUoticus, and also in Amphishvnaalba, A. ftdicjinosa, A vermicularis, and Lepidosternon microcej^halum. Kiikenthal figures ductus carotici in Lacerta agilis (27), and Brandt(15) records them in L. crocea (Zootoca vivipara) Beddard, as pointed out above, has found ductus in Tupinamhis nigro-punctatiis and Iguana tuberculata, while he reports them as missing mseveral species of Varamis and AmpUsbmna and in Heloderma siispectum. It will be seen that in general there is a fair correspondence betweenthe position of the heart and the persistence of the ductus caroticus. In DA. P. A Fig. 4.—Diagram of the arterial arches in Lacerta as before. the forms in which the heart is far removed from the head the ductusdisappears, and in these forms too a carotis primaria is often developed,and vice versa. One striking exception is H. suspecttim, where, as Beddardhas pointed out, there seems to be no reason why a ductus should notbe present; it is nevertheless abseitt. Hochstetter {) states that he has found ligamenta Botalli in all thelaro-e Lacertilia in which he has sought it, viz.: Varanus griseus, V. rarius,V. nilotieus, Hydrosaurus salvator, Uromastix , U. Hardivichii,Pseudopus Rallasii, and others Sometimes it is represented only by asmall stump on each side in H, salvator, and on the right side only inPlatydactylus annularis. Brenner (17) points out that in Lacerta he 1 It will be noticed that the term common carotid artery () is applied in this formto a vessel that appears to be the morphological equiv
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Keywords: ., bookcentury1800, bookdecade1860, booksubjectanatomy, bookyear1867
