502 On the Galapagos Lizards of the Genus Tropidurus. 



mentioned by me will prove to belong to the Charles-Island 

 form, which has no stripes, whereas as a matter of fact it is 

 precisely our unique adult striped individual (T. bivittatus = 

 lemniscatus) which has the 65 scales. Here again we see 

 that Baur has omitted to refer to Bell's original description 

 in the l Zoology of the l Beagle,' ' where T. Grayi is figured 

 in a perfectly recognizable manner ; otherwise he would not 

 have been embarassed to guess whether the name Grayi was 

 made to apply to the striped form rather than to the spotted 

 one. And finally, whilst I trust nobody will contest the 

 accuracy of the localities given by Commander Cookson, 

 accompanied by dated labels, the specimens from Abingdon 

 Island agree perfectly with Bell's T. Grayi and Steindach- 

 ner's T. pacificus, forms held by Dr. Baur to be restricted to 

 Charles and Bindloe respectively. 



As the striped form, T. bivittatus (T. Grayi, spec. 5, of my 

 'Catalogue'), appears to be distinguished constantly, apart 

 from the coloration, by its larger scales on the sides of the 

 neck and by the upper head-scales being more broken up, I 

 think it best to restore it to the rank of a species distinct 

 from T. Grayi. But I feel justified in rejecting all Baur's 

 new species as based on mere slight varieties of T. Grayi 

 and T.pacfficus, as will appear from the following synonymy ; 

 I also give the number of scales round the middle of the 

 body in the various specimens preserved in the British 

 Museum. 



1. Tropidurus Grayi. 



Leiocephalus Grayi, part., Bell, Zool. ' Beagle,' Eept. p. 24, pi. xiii. 



fig._ 1(1842). 

 Tropidurus Grayi, part., Steindachner, Festschr. zool.-bot. Ges. Wien, 



1876, p. 310, pi. ii. fig. 1 ; Bouleng. Cat. Liz. ii. p. 172 (1885). 

 Tropidurus albemarlensis, indefatiyabilis, delanonis, duncancnsis, Baur, 



Biol. Centralbl. x. 1890, p. 478. 



1. Darwin's specimen, the type figured by Bell. No doubt 

 from Charles Island. <$ . Sc. 63. 



2. Darwin's specimen, probably from the same locality, 

 c? . Sc. 65. 



3. Ditto. <J. Sc. 61. 



4. Ditto. cJ . Sc. 59. 



5. Ditto. ? . Sc. 61. 



6. Albemarle, Commander Cookson. <$ . Sc. 57. 



7. Abingdon, Commander Cookson. £ . Sc. 59. 



