4 TYPHLOPIDA. . ; 
Nasal shield very large, divided or semidivided, extending on each 
side of the rostral to the upper surface of the head. 
2. Typhlops, p. 7. 
Il. Head covered with small uniform scales, 
3. Typhlophis, p. 57. 
Skull of Zyphlops lumbricalis. 
1. HELMINTHOPHIS. 
Rhinotyphlops (non Fitz.), Peters, Mon. Berl. Ac. 1857, p. 40. = 
Helminthophis, Peters, Mon. Berl. Ac. 1860, p. 517, and Sitz. Ges. 
naturf. Wr 1881, p. 69; Bocourt, Miss, Sc. Mex., Rept. p. 502 
(1882). 
Idiotyphlops, Jan, Arch. f. Nat. 1861, p. 6, and Arch. Zool. Anat. 
Phys, i. 1862, p. 186, and Icon, Gén. Ophid. p. 32 (1864). : 
Liotyphlops, Peters, Sitzb. Ges. naturf. Fr. 1881, p. 69; Bocourt, 
op. cit. p. 501. 
A pair of large prefrontals and a frontal; nostril between two 
nasals. 
Tropical America. 
Synopsis of the Species. 
I. Preefrontals in contact behind the rostral. 
Ocular shield in contact with the third 
MOR TANS ic sy sok oh ee cont nein aes 1, flavoterminatus, p. 5. 
Ocular separated from the labials by asub- - 
ocular 
LP ePeabnees pot te: Sree 2, frontalis, p. 5. 
