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 I. Acanthophis antarcticus (Shaw). 



Boa atttarctica^ Shaw, Nat. Misc., 1794, pL 535. 



Acanthophis antarcticus^ Boulenger, Cat. Sn. Ill 1896, p. 355 (s. syn.). 



Head with elevated sides; lores oblique; eye much shorter 

 than its distance from the mouth. Rostral more broad than 

 deep, with horizontal edge; nasal large, in contact with the 

 praeocular; internasals as long as or shorter than the praefrontals; 

 frontal narrower than the supraocular, as long as or shorter 



Fig. III. Acanthopliis antarcticus (Shaw). Nat. size. 



than its distance from the tip of the snout, as long as or longer 

 than the parietals; supraocular sometimes angular and horn- 

 like; the head-shields rugose or striated; one prae- and two 

 postoculars; two or three suboculars; temporals 2 — 3 + 2 — 4; 

 six or seven upper labials, separated from the eye; four lower 

 labials in contact with the anterior chin-shields; latter as long 

 as or shorter than the posterior. Scales in 21 or 23 rows, 

 dorsals keeled; ventrals 113 — 136; anal entire; subcaudals 

 41 — 57, the 5 — 27 last divided. 



Yellowish, reddish or greyish-brown above, with dark trans- 



