352 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxv. 



in front of ventrals; second dorsal high, the free margin concaA'e, 

 anal similar to soft dorsal, the last ra}" more produced: caudal ray 

 deepl}' lunate, the lobes much ])roduced and falcate; pectoral mod- 

 erate, somewhat falcate, foui' filamentous raj's widely detached and 

 nearly equal to head in length; ventrals short. Scales rather small, 

 smooth, thin, and deciduous; lateral line extending upon lower lobe 

 of caudal which is scaled at base. 



Color in alcohol, silvery, the spinous dorsal and pectoral tins dark, 

 anterior edge of second dorsal also dark; detached pectoral rays white. 



Tyix'. — No. 17 X, a specimen 10.75 inches long, from Formosa, F. I., 

 returned to the Imperial Fishtn-ies Institute. 



Family GERRID.E. 



137. XYSTiEMA FILAMENTOSUM ( Cuvier and Valenciennes). 



One specimen. No. 823, from Koto.sho. 



Dorsal filament broken. Faint, roundish, ))rovvnish spots present as 

 shown in Bleeker's figure, these arranged in vertical cross rows; obso- 

 lete dark spots at base of dorsal rays. Depth 2.-1: in length; scales 46. 



One tine specimen. No. 40 x, from Formosa, F. 1. 



Family POMACENTRID.F. 



138. GLYPHISODON SAXATILIS (Linnaeus). 



Head 2.5 in length; depth 2; D. XIII, 13; A. II, 12; scales 5-30-12. 



Dark bands 5, about as broad as the interspaces, the first from the 

 nape to the axil forming a black spot on the pectoral; two below the 

 spinous dorsal, the fourth under front of soft dorsal, the last under 

 caudal peduncle; spinous dorsal dusky; soft dorsal and anal dusky at 

 base and tip; caudal y:)lain, without dark margin above or below. 



This is Glyphlxodon co'lesthius (the variety with plain caudal) of 

 Giinther and Bleeker, and corresponds fairly to Bleeker's fig. 5 in PI. 

 IX, in Bleeker's Atlas of the Pomacentrida?. But the true (rhjphi' 

 sodon c<vle.Ht)))v>i has the caudal edged above and below with blackish. 

 Whether this character is of distinctive value we have not the material 

 to decide. 



The names Vhietodon saxatUls and CJrModon rotundus of Linnaeus 

 seem to belong to the present species. The American species, hereto- 

 fore called (TJy2)Ji!s()doi) xa.ndHis. is adifi'erent species, having six l)lack 

 bands, the body deeper and the l)ands narrower. This ma}' stand as 

 Glyphisodon inarghudux (Bloch). The Hawaiian species Glyphlsodon 

 (ihdoml nails (Cuvier and Valenciennes), with deeper body and very 

 narrow crossbaiids. is also different, although more like G. nunuj/iKifus. 

 It is not ccrlain whether this s])ecies or G. (■(vhxfl)nif< is the original of 

 Ghivtodoii sd.nitdl.s, or indeed that th(> two forms ai"e really distinct, 



