ADDENDA AND CORRIGENDA. 507 



each side, extending entirely across in front of the anal scuta. Six 

 anal scuta ; two small ones on the middle line, one of which is 

 marginal ; one large one on each side of these, also marginal ; and 

 a small one on the external side of these, also marginal. Colour 

 brown, dark above, pale below, darkest on the sides (specimen not 

 in the best condition) ; side of head with some yellow spots ; lips 

 and throat white, the former with a dark brown spot on some of 

 the labials. 



millim. 



From end of snout to vent 32 



From end of snout to ear-opening . . 7'5 



Fore limb lO'O 



Hind limb 14*5 



Pebas, Upper Amazon. 



rage 417. 



Erase Scolecosaurus pallidiceps. 



Sixth line of generic diagnosis of Cophias, erase " clawless." 



The Synopsis of the species of the genus Cophias is to be replaced 

 by the following : — 



I. Digits clawed. 



Fore limb tetradactyle, hind limb didactyle ; 28 



scales round the middle of the body 1. heteropus. 



Both pairs of limbs tridactyle ; 2Q scales round the 



body 2. iridactylus. 



Fore Hmb tridactyle, hind limb didactyle ; 34 scales 



round the body 3. hoettgeri. 



II. Fore limb with three or four clawless tubercular digits ; hind 



limb undivided. 



Scales quadrangular, juxtaposed 4. flavescens. 



Scales hexagonal, overlapping 5. dorhignyi. 



Erase the footnote. 



Page 418. Add a species : — 

 1. Cophias heteropus *. 



Chalcides heteropus, Licht. Xomencl. Rept. Mus. Berol. p. 17. 

 Brachypus pallicUceps, Cope, Proc. Ac. Philail. 18G2, p. 350. 



Fore limb with four, hind limb with three clawed digital tubercles. 

 Frontonasal hexagonal, a little longer than broad; frontal large, 

 posterior angle truncate and in contact with an elongate inter- 

 parietal ; two supraoculars ; nasal twice as broad as deep ; loreal 

 shorter but deeper than the latter ; two infraorbitals, anterior longest^ 

 and in contact with the third, fourth, and fifth upper labials ; tern- 



Described from the type specimen. 



