
Cyclolumpus, 87 
or palatines ; no barbel about mouth; gill-openings small, in a level with eye, oper- 
cular flap slightly pointed. Two dorsals well separated, the first rather hidden in the 
skin. Ventral disk rather large, much longer than wide, its length 12 in the length 
of head measured as above. Body thickly covered with large tubercles which are armed 
with small projections on the sides and base ; interspaces between the tubercles very 
narrow and entirely naked ; largest tubercles on the sides of body above pectoral ; those 
on head much smaller, and those on chin and caudal peduncle still smaller; narrow 
posterior part of head, axil of pectoral, and small space immediately posterior to the 
ventral disk entirely free from tubercles ; basal part of all the fins with a few small 
tubercles. Color dark reddish yellow, paler below; all the fins pale. 
Described and figured from a dried specimen 9.2 cm. long as measured to tip of 
caudal, obtained about Niigata, Prov. Echigo, by Mr. Yamaguchi. 
Cyclolumpus, the new genus with Cyclolumpus asperrimuts as type is defined as 
follows : 
Body somewhat oblong, closely covered with large tubercles all over except fins, 
narrow posterior part of head, axil of pectoral etc.; ventral disk smaller than in Ay7- 
crotremus, a Closely allied genus. 

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