112 Sir G. F. TTninpson on 



Atopochihis viacrocep1mhtf>, sp. n. 



Deptli of body '^ its greatest width, 5 times in total length. 

 Head niuch depressed, once and ^ as long as broad, its length 

 twice and | in total length, its upper surface slightly rugose ; 

 snout broadly rounded, its length twice and ^ postocular part 

 of head ; nostrils nearer end of snout than eye, the diameter 

 of wliich is (S\ times in length of head and twice and .\ in 

 interorbital width ; buccal cleft -i length of head ; band of 

 pra?maxillary teeth interrupted in the middle, as broad as the 

 lower lip; lateral barbel | length of head, more than twice as 

 long as posterior barbel. Occipito-nuchal shield broader 

 than long. A striated, acutely poitited humeral process. 

 Dorsal I 6 ; spine striated, ? length of head. Adipose fin 3 

 times as long as deep, § its distance from rayed dorsal. 

 Anal 9 (3 rays rudimentary). Pectoral spine striated, with 

 8 retrorse teeth on its inner border, its length § that of the 

 head. Ventral reaching origin of anal. Caudal peduncle' 

 slightly longer than deep. 



Slate-grey when fresh, with three yellowish bars on the 

 body, the first above the pectoral fin, the second in front of 

 the adipose fin, the ihird on the caudal peduncle; head 

 greenish grey above, greenish yellow beneath ; fins greenish 

 yellow, ventrals, anal, and caudal with a dark brown bar; 

 iris greenish grey, with a golden streak on upper part. 



Total length 75 mm. 



A single specimen. Native name : Kihanda. 



Only one species was hitherto known of the remarkable 

 Silurid genus Atop)chihis, Sauvage — A. Savyrgnani, Sauv., 

 from the Upper Ogowe, in which the head is contained 33 

 times in the total length and the eye 4j times in the length of 

 the iiead and not more thai\ twice in the interorbital width ; 

 the dorsal and pectoral spines are longer, and there are 11 

 anal rays instead of 9. 



XVII. — On new Thyrididte and Pyralidaj. 

 By Sir George F. Hampson, Bart., B.A., F.Z.S., &c. 



The numbers refer to papers on the classification of the 

 Thyridids (P. Z. S. 1897, pp. 603-633), the Chrysauginre 

 (pp. 633-692) ; the Epipaschianre,Endotrichiua3, and Pyraliute 

 (Trans. Ent. Soc. 1896, pp. 451-550). 



