104 Zoological Society : — 



of square keeled scales, every fourth ring being larger, prominent ; 

 the under side with rings of small square shields. 



PoRiODOGASTER Grayii, A. Smith, MS. 



Brown, yellowish beneath. 



Hab. ? British Museum. 



Mr. Cope, to whom I have shown the specimen of this species, has 

 drawn my attention to the genus Xantusia of Professor Baird, no- 

 ticed in the 'Proceedings of the Academy of Natural Sciences' for 

 1858, p. 255, which agrees with it in many particulars, but is cer- 

 tainly distinct, though probably belonging to the same family, Xan- 

 tusiidcB, which may be characterized by the form of the tongue, the 

 front fold on the throat uniting the ears, and the absence of the eyelids. 



Professor Baird describes the pupil of Xantusia as vertical ; in our 

 genus it is circular. 



This similarity to Xantusia makes it probable that this genus 

 is from Lower California. 



M. Auguste Dumeril, in the ' B/Cvue et Magasin de Zoologie ' for 

 1852, describes and figures a new genus of Saurian under the name 

 oi Lepidoph't/ma Jlavimaculata (t. 17), from the province of Peten 

 in Central America, which resembles this Lizard in many particulars; 

 but he particularly says that it has no femoral pores, which he says 

 are found in all the Zonures with which he has compared it. 



M. Dumeril's genus is probably the same as the Xantusia of 

 Baird ; but cannot be the same as the one here described, which is 

 peculiar, not only from having large femoral pores, but pores on the 

 ventral shield as well. 



May 12, 1863.— E. W. H. Holdsworth, Esq., F.Z.S., in the Chair. 

 On a New Species of Calliste from Costa Rica. 

 By Osbert Salvin, M.A., F.Z.S. 

 Calliste Down, sp. nov. 



Supra nigra : dorso vix viridi lavato, plumis nuchiB et laterum 

 colli utrinque argentescenti-viridi terminatis, pilei margine pos- 

 tico ochracescente marginato : uropygio argentescenti-viridi, tec- 

 tricibus superioribus rectricum cyaneis : subtus gula tota nigra : 

 pectore superiore nigro, plumis viridescenti-cinnamomeo termi- 

 natis : ventre itno cum crisso et lateribus cinnamomeis, pectore 

 inferiore paulo dilutiore : primariis usque ad terminos, secun- 

 dariis, tectricibus alarum et rectricibus omnino nigris, pogoniis 

 externis omnium cyaneo marginatis, tectricibus subalaribus 

 albis, vix cinnamomeis ; campterio cyaneo, albo vittato : rostro 

 nigro, mandibulce inferioris basi albida : pedibus fiavo-nigris. 

 Long. tot. 5-25, alse 2'9, caudae 2, tarsi '75, poll. angl. 

 Hab. Costa Rica. 



This is a very distinct species, and unlike any of the genus. The 

 greenish-silvery feathers of the neck and the green uropygium sug- 

 gest the group which Dr. Sclater unites under the head of Procnopis, 

 as its proper position in the genus, its nearest ally being the New 

 Granadian C. nigriviridis, from which, however, it differs essentially. 



