188 



MAJOR P. WALL, I.M.S., O.M.Z.S. 



als, — -two or three, the second very long, and touching the eye. Infralabials, — the 

 second very long. Marginals, — none. Sublinguals, — two pairs, the posterior 

 separated by one scale. Cost als, — anteriorly 15 to i7,inmidbody 17 to 19, posteriorly 

 15 to 17 , smooth ; the vertebrals enlarged and twice as broad as the next row of costals in 

 the posterior part of the body, but in three specimens where the costals numbered 19 

 for a limited extent in the middle of the body the corresponding vertebrals were little 

 if at all larger than the upper costal row. In these specimens the reduction of rows 

 to the normal 17 was occasioned by the absorption of the uppermost costal row into the 

 vertebral, and the great enlargement of this row was re-established. Ventral s, — 137 

 to 143, broad as in land snakes, the posterior obtusely keeled in the median line; the 

 last one or two sometimes divided. Anal, - divided (entire in one). Colour, — 

 banded broadly with yellow, and blackish brown, the latter broader. 



Habitat. — Loo Choo Islands, Formosa. 



I append a synopsis of the specimens I have seen showing the shields which are 

 subject to variation. 





CD 

 g 



w 



13 



!-. 

 +-■ 



w 







•J, 



13 



r* 



O 



Costals. 



CO 



T-H 



Cd 



t-l 



a 



> 



^3 



ax 



13 



1-1 



4-> 



a 



a; 



> 



3* 







'u 



+-> 



s 



< 



O 



1H 



'u 



to 



O 



13 

 a 

 < 



I 



Yes 



1 R, 1 L 



16 



17 



15 



143 



Last two 



2 



2 



) » 



2 R, 2 L 



17 



17 



17 



141 



» j 



2 



3 



No 



2 R. 2 L 



15 



17 



15 



140 



None 



2 



4 



J 1 



2 R, 1 L 



16 



J 7 



17 



138 





2 



5 



Yes 



2 R, 1 L 



17 



19 



17 



141 





2 



6 



1 ; 



2 R, 2 L 



17 



19 



15 



142 





2 



7 



No 



2 R, 2 L 



15 



17 



15 



137 





1 



8 



Yes 



2 R, 2 L 



? 



17 



? 



138 





2 



9 



i > 



2 R, 2 L 



17 



19 



15 



142 





2 



Bmydocephalus annulatus (Krefft). 



Emydocephalus annulatus, A>^ w Proc. Zoo/. Soc. Lond., 1869, p. 322. 



Aipysurus annulatus, Boulgv. Cat., vol. iii, 1896, p. 304, in part. 



Similar to the above, but differing in having but two prefrontals, little if any 

 enlargement of the vertebral row, costals pluri-tuberculate and rough, and no 

 ventral keel posteriorly. 



Habitat. — Loyalty Islands. 



