219. DENISONTIA. 343 
B. Yellowish above, without dark edges to the scales. 
a. 9 (V. 155 ; C. 25). Swan R. 
C. Brown above. (H. nigriceps, Gthr.) 
a. 3 (V. 150; C.30), —P Dr. Giinther [P.]. 
(Type of H. nigriceps.) 
Mr » 
b. 2 (V. 160; C. 28). . Champion Bay, uboulay [C.]. 
N.W. Australia. 
c. 2 (V. 156; C. 25). S. Australia. Prof. Stirling [P.]. 
15. Denisonia nigrescens. 
Hoplocephalus nigrescens, Giinth. Ann. § Mag. N. H. (8) ix. 1862, 
Pi 131, pl. ix. fig. 12; Krefft, Sn. Austral. p. 68, pl. vi. fig. 4 
869), 
assimilis, Macleay, Proc. Linn. Soc. N.S. W. x. 1885, p. 68. 
Eye as long as or slightly longer than its distance from the 
mouth. Rostral twice as broad as deep, just visible from above ; 
internasals not more than half as long as the prefrontals; frontal 
once and one fifth to once and a half as long as broad, at least twice 
as broad as the supraocular, as long as or a little longer than its 
distance from the end of the snout, shorter. than the parietals ; 
nasal entire, in contact with the single preocular; two (rarely one 
or three) postoculars; temporals 2+ 2, lower anterior wedged in 
between the fifth and sixth labials; six upper labials, third and 
fourth entering the eye; three or four lower labials in contact with 
the anterior chin-shields, which are as long as or a little shorter 
than the posterior. Scales in 15 rows. Ventrals 170-200; anal 
entire; subcaudals 30-46. Dark olive-brown to black above, 
yellowish below ; head black above and below; ventrals and sub- 
caudals sometimes dark-edged. 
Total length 545 millim.; tail 75. 
New South Wales and Queensland. 
a. & (V.170; ©. 35). Sydney. G. Krefft, Esq. [P.}. 
; (Type.) 
6. 2 (V. 186; C. 44). Port Macquarie. G. Krefft, Esq. [ P.]. 
‘ce, d. 9(V. 180; 0.39) & =NewSouth Wales. G. Krefft, Esq. | P.]. 
her. (V. 172; C. 36). 
e. 2 (V.171; C. 39). Queensland. H.M.S ‘Challenger. 
f, Hgr. (V. 179; C. 34), = Australia, | 
16. Denisonia nigrostriata. 
Hoplocephalus nigrostriatus, Krefft, Proc. Zool. Soc. 1864, p. 181, 
and Sn. Austral. p. 70, pl. xii. fig. 3 (1869); F. Miill, Verh. Nat. 
Ges, Basel, vii. 1885, p. 690. 
Alecto dorsalis, Jan, Icon. Gén. 44, pl. ii. fig. 1 (1873). 
Eye slightly longer than its distance from the mouth. Rostral 
twice as broad as deep, just visible from above ; internasals half as 
long as the /prefrontals; frontal a little longer than broad, twice as 
