154 MR. r. E. BEDDARD ON A [Feb. 15, 



Snakes : Typhlops reticulalus, L. ; Geophis lineatus, D. &, B. ; 

 Elaps lemniscatus, L, 



Batrachians : Leptodactylus pentadactylus, Laiir. ; Sufo marinus, 

 L. ; Bufo typhonius, L. ; Coecilia gracilis, L. 



GONATODES ANNULARIS, Sp. n. (Woodcut, p. 153.) 



Closely allied to G. albogularis, D. & B. Snout longer than the 

 diameter of the orbit, obtuse, the granules on its upper surface 

 small, not larger than the dorsals. Supraciliary edge with a small 

 projecting spine, as in most species oi Sphcerodactylus. Seven upper 

 and four or five lower labials ; a pair of small chin-shields behind 

 the mental. No transversely enlarged subcaudals. Grey-brown 

 above, with a series of large black spots along each side of the 

 vertebral zone ; head and limbs with black spots or marbhngs ; 

 tail with black annuli, alternating with white spots inferiorly ; lower 

 surfaces pale brown, throat with oblique dark-brown lines converging 

 backwards. 



millim. 



Total length 86 



Head 11 



Width of head 7 



Body 29 



Fore Hmb 15 



Hind limb 19 



Tail 4G 



Two female specimens. 



5. On the Structure of a new Genus of Lumbricidse 

 {Thamnoclrilus guUelmi^). By Frank E. Beddard, 

 M.A., F.R.S.E,, Prosector to the Society, Lecturer on 

 Biology at Guy's Hospital. 



[Eeceived February 15, 1887.] 



I owe the specimens of the worm described in the present paper to 

 the kindness of Mr. W. L. Sclater, F.Z.S., who collected them for 

 me during his recent visit to British Guiana. 



They are all rather large worms (see woodcut, fig. 1), measuring 

 up to 6 inches in length and g inch in breadth, and belong to a new 

 genus and species of Lumbricidse, which I propose to call Thamno- 



DRILUS GULIELMI. 



External Characters. — The colour is purplish on tlie dorsal 

 and reddish yellow on the ventral side : the clitellum is distin- 

 guished from the rest of the body by its paler tint. 



The mouth is situated precisely at the anterior extremity of the 



1 Named after Mr. William Lutley Sclater. 



