244 



PYGOPODIBiB. 



length of the snout in males, considerably less in females. Rostral 

 triangular or pentagonal, nearly twice as broad as high; nostril 

 pierced between the first nasal and three nasals (two in the specimen 

 described as D. molleri, in which the naso-rostral and upper nasal 

 have fused), the two anterior of which form a suture with their 

 fellows on the snout ; exceptionally, however, the upper nasal is 

 separated from the nostril ; a pair of fronto-nasals ; prsefrontal 

 large, a- little broader than long, seven-sided, the antero-lateral 

 sides very short, in contact with a large loreal ; frontal as broad as 

 or a little narrower than the prajfrontal, longer than broad, seven- 

 sided, its posterior angle wedged in between the pair of parietals, 

 which are considerably larger than the frontal ; a pair of enlarged 

 scales on the outer side of the parietals ; two large supraorbitals ; 

 a large loreal, and four or five small plates between the orbit and 

 the nasal ; five or six upper labials, fourth much elongate and 

 situated under the orbit, from which it is separated by a row of 

 small scales ; mental large, triangular, broader than long ; four 

 lower labials, the two anterior much dilated vertically, the first 

 forming a suture with its fellow behind the mental. Sixteen longi- 

 tudinal rows of scales round the middle of the body. The enlarged 

 ventral scales vary considerably in width, being sometimes not quite 

 twice as broad as long, whilst in most specimens they are more than 

 twice as broad as long ; they form 45 to 60 pairs. Two large and 

 a smaller median anal scales. Olive above ; head generally with 

 four more or less confluent black cross bands, which may be separated 

 by whitish bands ; in specimens c and h these bands are indistinct, 

 and the sides of the head and body are vertically barred with darker 

 and whitish ; specimen i is uniform olive, without any markings. 

 Lower surfaces yellowish. 



6. 



Head 13 miUim. 



Width of head 7 „ 



Body 85 „ 



Tail 355 „ 



Hind limb 4-5 „ 



Western Australia. 



a-b. Hgr. 

 c-f. ^,$,&hgr. 

 g,h. J$. 

 ». 6. 



W. Australia. 

 Perth. 



Champion Bay. 

 NicolBay. 



? 



J. Hunter, Esq. [P.]. (Types.) 



Mr. Duboulay 

 Mr. Duboulay 

 Mr. Duboulay 

 Sir A. Smith 

 Ddma grayC) 



(Type of 



2. Delma impar. 



Pseudodelma impar, Fischer, Arch. f. Nat. xlviii. 1882, p. 287, 

 pi. XVI. figs. 1-4. 



Tail twice as long as head and body, liudimentary limbs small. 



