( 123 ) 



but smaller groove on the suture between the rostral and nasal. 

 The upper part of the rostral one-third the -width of the head. 

 The lower part much longer than broad. Nasal very broad 

 below, as broad as the frontonasal in the middle. The suture of 

 these shields is continued above the nostril. The fronto-nasal 

 extends a little backwards to the hinder side of the rostral and 

 its posterior margin is deeply concave. The first labial in 

 contact with rostral and nasal. The second, with nasal, fronto- 

 nasal and prseocular. The third slightly ascends between the 

 prseocular and ocular. The fourth, not much larger than the 

 third, scarcely reaches further back than the ocular. All the 

 shields on the crown are enlarged, the supraoculars and inter- 

 parietal being rather the largest. Scales of the body in 24 longi- 

 tudinal and 312 to 329 transverse rows. Colour uniform brown 

 above and below, or with the terminal half of scales slightly 

 paler. Grows to 11 inches. Circumference yg-th of entire length. 

 Inhabits Pinang, Assam (Anderson) Hardwar (Day). 



T. Theobaldanus, Stol. J. A. S., B., 1&71, p. 429, PI. 25, f. 5-S. 



Head shields as in porrectus, but the rostral reaches farther 

 back on the top of the head and is nearly one half its width, but 

 much narrower below. Scales of body in 22 longitudinal and 

 485 transverse rows. Tail long with 26 transverse rows of scales. 



Colour above pale brown, pale below. 



Grows to 14 inches. Circumference ^V of the entire length. 



Inhabits India. (1). 



T. tenuicollis Peters, MonatshericMe Akad. Berlin 1864-, 

 p. 272. 



Onychocephalus, (Ophthalmidion) — tenuicollis Peter, 1. c. 

 Body very elongate, cylindrical, conspicuously thinner at the 

 head than at the tail. Eyes not perceptible. Dorsal portion of 

 the rostral shield a little longer than broad, rounded off, convex, 

 nasal in front of the nostril united to the fronto-nasal, and in 

 contact beneath with the first upper labial, and the anterior half 

 of the second; fronto-nasal behind flatly concave. Praeocular and 

 ocular very similar in size and form, divided below by the pointed 



