from the Southern Shan States. 199 



both from the Burmese and Siamese sides, and reveals the 

 existence of seven previously undescribed species, all of which 

 are represented by excellently preserved specimens. I may 

 here add that the collection of Reptiles formed by Mr. Oates 

 in the same district, although poor in number of specimens, 

 yielded the type of a new genus and species of Snakes, which 

 has been lately described in the first volume of the new Cata- 

 logue of Snakes as TrirhinophoUs nuchaUs^ and an example 

 of a Lizard previously unrepresented in the Museum, Acantlw- 

 saura kakhienensis, Anderson. 



Ophiocephalidae. 

 I. Ophi'ocepkalus gackuttf Ham. Buch. 

 Nampaudet, 2000 feet ; Fort Stedman, 3000 feet. 



2. Opliiocephalus siamensis^ Gthr. 

 Fort Stedman. 



Mastacembelidse. 

 3. Mastacemhelus Oatesu, sp. n. 



Depth of body 9^ to 10^ times in total length, length of 

 head 6^ to 7 times. Snout thrice as long as diameter of eye, 

 ending in a trifid appendage ; cleft of mouth extending 

 hardly to below nostril ; four or five strong spines at angle 

 of prgeoperculum, increasing in size from the lower to the 

 upper. Vertical fins distinct, united only at the base with 

 the caudal. Dorsal XXIX-XXXIII * 48-55 ; originating 

 above middle of pectoral. Anal III 46-55. Pectoral about 

 ^ length of head. 18-20 scales between origin of soft dorsal 

 and lateral line. Pale yellowish brown, uniform or marbled 

 with brown or with irregular dark brown blotches ; dorsal 

 line and top of head dark brown ; pectoral usually brown 

 with broad yellowish border. 



Total length 290 millim. 



Fort Stedman, 3000 feet. Eight specimens. 



4. Mastacemhelus caudtocellatuSj sp. n. 



Depth of body 8f to 10 times in total length, length of 

 head 5 to 5^ times. Snout thrice as long as diameter of eye, 

 ending in a trifid appendage ; cleft of mouth extending 

 hardly to below nostril ; no spines on praeoperculum. Ver- 

 tical fins distinct, united only at the base with the caudal. 



• 29 spines in one specimen, 33 in two, 32 in the five others. 



