542 PROCEEDINGS OF THE NATIONAL MUSEUM. 



The ii1)ove doscription i.s taken from specimens 10 to 12 inches long 

 from iS'ao-asaki. 



Numerous specimens were collected at Tsuruga, Nagasaki, Tokyo, 

 Myiako (north of Sendai), Hiroshima, Hakata, Onomichi, and Aoniori. 



It is the common flying-tish or Tobis-Uwo of Japan, abundant all 

 along the coast in the summer. It is subject to a number of varia- 

 tions, but all specimens examined by us seem to belong to one species. 

 Exocmtm diklerhlnl is evidently identical with Cypsih(.rus agoo. 



{agu, a vernacular name, now rarely used.) 



II. CYPSILURUS PCECILOPTERUS ( Cuvier and Valenciennes). 



Exoccetus pcedlopterns Cuvier and Valenciennes, Hist. Poiss., XIX, p. 112, 



pi. Dcxi; New Britain. — GtJNTHER, Cat. Fish., VI, 1866, p. 291; Formosa. 

 Exoccetus, sp. No. 309, Ishikawa, Prel. Cat., 1897, p. 18; Hakodate. 



A specimen in the Imperial Museum at Tokyo is probably referable 

 to the above species. The following notes were taken on this specimen: 



Scales 42, 24 before dorsal; anal short; head flattish above; body 

 rather plump; pectoral reaching to middle of dorsal, its second ray 

 divided; dorsal low; ventrals reaching past front of anal. 



Color: Ventrals dusky behind, perhaps faded; dorsal unspotted; 

 pectorals profusely and coarsely spotted with black, the spots unequal. 

 According to Giinther the dorsal has 12 or 13 ra3^s, the anal 9, the dis- 

 tance from first dorsal ray to first of caudal being much greater than 

 length of head. 



Described from a stuflFed specimen, 10 inches in length, taken at 

 Hakodate. It is questionable whether this species is really identical 

 with 0. poicilopterm., but no other described species agrees as well. 



{noiKikoz, variegated: Ttrepov^ fin.) 



12. CYPSILURUS HIRUNDO (Steindachner.) 



Exocoetus hinindo Steindachner, Ichtliyol. Mittheil., \^III, 1866, p. 482, pi. iv, 

 fig. 2; Hongkong. 



Head 4^ in length; depth 6f. Dorsal 12; anal 9; scales about 53. 



Body not compressed, about as wide as deep, the head short, widest 

 at a level witli upper edge of pupil; its width equal to distance from 

 edge of opercle to middle of eye. Eye two-fifths longer than snout, 

 contained 1\ times in postorbital part of head. Lower jaw project- 

 ing, the tip injured in our specimen and the barbels missing. The 

 interorbital space is wide and shallowly concave, its width a little 

 greater than the diameter of the eye. Snout short and broad at the 

 anterior margin of the eyes; its width is three-fifths of its length. 



The pectoral reaches to under the seventh or eighth dorsal raJ^ Its 

 upper ray is undivided and is contained 2f times in the length of head 



