MICROSICYDIUM 295 



pearl white lines on head, inclined backward, the first descending 

 from forward part of eye ; the second starts above rear margin 

 of eye and passes down behind pupil to throat; the third and 

 fourth cross the cheeks; the fifth crosses base of pectoral; be- 

 hind angle af pectoral is a sixth, very short line ; all these lines 

 tend to disappear in alcohol ; the fins are all uniform dark brown. 



Here described from three specimens, 20 to 23 millimeters 

 in length, collected by me at Dumaguete, Oriental Negros. 



I also place here thirty-nine specimens, from 16 to 29 milli- 

 meters in length, collected at Puerto Galera, Mindoro. In life 

 these specimens were uniform wine red; the vertical lines on 

 the head were opalescent blue. After some years in alcohol, 

 they vary in color from uniform clear brownish yellow to dark 

 brown with paler head, very light throat, and dark brown or 

 blackish fins; in some of the specimens there are ten or twelve 

 lines, six or seven on the head and the rest on the trunk behind 

 the angle of the pectoral; in a few cases no traces are left of 

 the crosslines on the head. They also vary in shape, especially 

 that of the head, but are all connected by intermediate stages, 

 so that they cannot be separated. The Bureau of Science col- 

 lection also contains two faded specimens from Zamboanga, 

 Mindanao, and two from Sitankai, Sulu Province. 



I include here also two clear yellow specimens from Zam- 

 boanguita, Oriental Negros, 28 and 31 millimeters long, which 

 each have a small, light brown spot on the upper posterior angle 

 of the opercle, but agree in other respects. 



A specimen, 33 millimeters long, from Cabalian, Leyte, is 

 uniform dark red-brown, with a small, blackish brown spot 

 on the upper posterior angle of the opercle; the fins are larger 

 and higher than in any other Gobiodon in the collection. It 

 seems to be intermediate between G. hypselopterus and G. quin- 

 questrigatus, having the pectoral count of the former ; the head 

 stripes are so faded as to be largely illegible. 



According to Weber this species is confined to the Indo-Aus- 

 tralian Archipelago. 



A color sketch from life by T. S. Espinosa, of a specimen 

 from Zamboanga, shows the lines on the head lavender, mar- 

 gined with wine red. The specimen is no longer in the collec- 

 tion. 



Genus 66. MICROSICYDIUM Bleeker 



Microsicydium BLEEKER, Esq. Syst. Nat. Gobioides, Arch. Neerl. Sci. 

 Nat. 9 (1874) 314. 



