688 



REPORT OF NATIONAL MUSEUM, 1898. 

 Ilhtneura fioridana Baird. 



Catalogue 

 No. 



3202 

 8371 

 8974 

 8900 

 19993 

 22318 



Number 



of speci- 



meus. 



Locality. 



Micanopy, Florida . 

 Manatee,' Florida .. 

 Florida 



St. Johns, Florida.. 



Eustis, Florida 



Lake City, Florida. 



When 

 collected. 



April— ,1877 



From whom received. 



Dr.J. B. Barratt. 

 N.B.Moore 



Prof. S. F. Baird 



U. S. Fish Commission 

 P. A.Kolfs 



Nature of 

 specimen. 



Alcoholic, 

 do. 

 do. 



TROGONOPHIDJE. 



Trof/onophid(e Gkay, Cat. Tort, and Ampbisb., Brit. Mus., 1844, p. 68.— Cope, 

 Proc. Amer. Ass. Adv. Sci., XIX, 1871, p. 237. 



No limbs. Teeth auchylosed to the alveolar ridges. 

 The dentition of this family resembles that of the Acrodonta. It 

 does not differ in other respects from the Amphisbienidne. There are 

 but three genera, and these are confined to the Old World. They 

 differ as follows : 



No preanal pores ; two pairs of upper bead sbields ; nostril pierced in a nasal. 



Trogonophis Kaup. 

 Preanal pores; tbree large npper bead sbields besides the rostral; nostril pierced 



between two nasals Pachy calamus Giinther. 



Preanal pores; a single large upper head shield; nostril pierced in a nasal. 



Agamodon Peters. 



Trogonophis has but one species, which is found in northwest Africa. 

 Pachy calamus has a single species, which is an inhabitant of the island 

 of Socotra, off the coast of east Africa. The only species of Agamo- 

 don is east African. 



SERPENTES. 



I. ANATOMY. 



THE OSSEOUS SYSTEM. 



There is much uniformity in the characters of the skeleton in the 

 Serpentes. Peculiarities characterize the principal divisions, but no 

 definite grouiis can be traced in the great mass of the harmless snakes, 

 so far as the skeleton is concerned. 



Slcull. — The ijremaxillary bone is connected with the skull by only 

 its superior and inferior spines in all snakes excejit the Scolecophidia, 

 where it is connected by suture laterally and iuferiorly with the ethmoid 

 also, and in the Epanodonta with the maxillary. In other snakes the 

 ethmoid lies above its inferior spine. The nasals are always distinct 

 from each other, except in Charina, where they are coossified. They 

 are also free laterally, except in Scolecophidia, Tortricina, and 

 many peropodous genera, where they are suturally united posteriorly 

 and laterally with the i)refrontals. Such are the genera Loxocemus, 



