14. UELICOPS. 



279 



Helicops Cyclops, Cope, Proc. Ac. Philad. 1868, p. •'^09. 

 ? Helicops f uuiigatus, Cope, I. c. p. 308. 



Eye small ; rostral visible from above, usually iu contact with 

 the iuternasal ; frontal once and a half to once and two thirds as 

 long as broad, as long as or a little longer than its distance from 

 the end of the snout, as long as or a little shorter than the 

 parietals ; loreal as long as deep or deeper than long ; one prae- 

 and two postoculars ; temporals 1 or 2 + 2 or 3, posterior keeled ; 

 eight upper labials, fourtli entering the eye ; five or six lower 

 labials iu contact with the anterior chin-shields, which are as long 

 as the posterior. Scales in 1!) I'ows, strongly keeled even on the 

 occiput and nape ; outer row more or less distinctly keeled, rarely 

 smooth. Yeutrals 102-130 ; anal divided ; subcaudals 61-94, 

 keeled. Olive or grey-brown above, with more or less regular 

 dark' brown, black-edged cross bands, which narrow towards the 

 sides, where they are usually contiuent with the black cross bands 

 of the belly ; a large rhomboidal dark blotch on the nape ; lower 

 parts yellowish (in spirit) with large black s^jots, or, more usually, 

 witli regular black cross bands. 



Total length 730 millim. ; tail 200. 



Tropical South America east of the Andes. 



a. 2 (V. 120; C. 61). 



h-e,f-g. S (V. 116, 117; 

 C. 72, 73) >S: $ (V. 120, 

 120,122,130; C.03,65, 



^, i.''c?(V.113; C. 72)& 



2 (V. 120 ; C. 6o). 

 k. d (V. 116; C. 94). 

 I Yg. (V. 118; C.:-). 

 m,n. $ (V.114;C.71)& 



va-. (V. 115; C. 83). 

 o. "Ilgr. (V. 102; C. 82). 

 p-t. 6 (V. 112 ; C. 73), 



9 (V. 114 ;C. 62), &vg. 



(V. 110, 111, 108; C. '77, 



(;2, 76). 

 u. $ (V. 109 ; C. 72). 



V. Skull. 



British Guiana. 

 Uemerara. 



Berbice. 



Para. 



Peruambuco. 

 Upper Amazon. 



Pebas. 



Movobamba, 

 N.E. Peru. 



Sarayacu, N.E. 



Peru. 

 Santa Cruz, 



Brazil. 



Mr. Snellgrove [C.]. 



W. A. Forbes, Esq. [P.]. 



II. W. Bates, Esq. [0.1. 

 Mr. A. II. EofFT 



Esq. [( 



fF[C.i. 



W. Davis, Esq. [C.]. 

 Messrs. Veitch [P.]. 



10. Helicops scalaris. 



Helicops scalaris, Jan, Arch. Zool. Anat. Phys. iii. I860, p. 250, and 

 Icon. Gen. 28, pi. iii. Kg. 1 (1868). 



Eye small ; rostral just visible from above and in contact with 

 the internasal ; frontal twice as long as broad, a little longer than 

 its distance from tlie end of the snout, a little shorter than the 

 parietals ; loreal trapezoid : one pme- and two postoculars ; tem- 

 porals 2 + 3; nine upper labials, fourth or fourth and fifth entering 



