PINEAL EYE IN LAOERTILIA. 



175 



I have also to acknowledge gratefully the gift of various 

 species of Lacertilia, prepared especially and sent to me from 

 the Bahamas by J. Gardiner, Esq. ; they arrived too late for 

 the results of their examination to be included in the present 

 article, but I hope to be able to publish an account of the 

 structure of the organ in these forms in a short time. 



The forms investigated have been the following : 



Hatteria punctata. 

 '■**Varanus giganteus. 



„ bengalensis. 



• Monitor (sp. ?). 



^ Ameiva corvina. 

 *- -Chameleo vulgaris. 

 „ bifurcatus. 



• Gecko verus. 



„ mauritanicus. 

 '^ -An oils (various species). 



Leioloemus tenuis. 

 *Uraniscodon (Plica) umbra. 

 x*Iguana tuberculata. 

 •< 'Draco volans. 

 .*Ceratophora aspera. 



Lyriocephalus scutatus. 

 ^*Calotes versicola. 

 , * „ ophiomaca. 

 . *Agama hispida. 

 Jr *Stellio cordylina. 

 * *Graramatophora barbata. 

 "<'*Moloch horridus. 

 Leiodera nitida. 

 ^ Anguis fragilis. 

 • Cyclodus gigas. 

 V Lacerta ocellata. 

 „ viridis. 



„ (Zootoca) vivipara. 



' • Seps chalcidica. 



The material has, in the great majority of cases, consisted of 

 spirit specimens in a better or worse state of preservation so 

 far as histological structure was concerned, so that in many 

 instances it has been impossible to do much more than ascer- 

 tain the presence or absence of the organ, its connection or 

 separation from the proximal part of the epiphysis, and perhaps 

 a few details with regard to its histological structure. Even in 

 fresh specimens the organ lies so deeply embedded in connec- 

 tive tissue and so closely shut in by bone, which must be 

 removed along with it to prevent injury to the structure, that 

 there is great difficulty in rapidly reaching it with reagents. 

 Of two of the most important forms — Hatteria punctata 

 and Varanus giganteus — I have had the great advantage, 

 through Professor Moseley's kindness, of examining fresh 

 specimens, and have thus been able to investigate more care- 

 fully the structure of the retina. 



