1918.] NATURAL SCIENCES OF PHILADELPHIA. 343 



by Microcanthus Swainson, 1839, a misprint or misspelling of the 

 same word. This name is given in honor of Mr. Masamitsu Oshima, 

 scientific expert of Formosa and author of an admirable memoir 

 (now in press) on the river fishes of Formosa. 



RHEOCLES Jordan & Hubbs. 



Type: Eleotris sikorce Sauvage. 



This genus belongs to the Atherinidce, as Dr. Boulenger has sug- 

 gested. It is characterized by its robust form and its few gill-rakers 

 (about 10), which as figured by Sauvage (Poissons de Madagascar) 

 are notably short and thick. 



SYLETOR Jordan. 



Type: Pisoodonophis cruentifer Goode & Bean. 



This eel, one of the few which burrows into the flesh of fishes, is 

 clearly not a Pisoodonophis. "Its peculiar and savage physiognomy 

 due to the constriction of its neck" and the snake-like form of the 

 head with the powerful muscular enlargements of the cheeks dis- 

 tinguish it adequately from the other Ophichthoid eels with blunt 

 teeth (TuX-ijTcop^ a spoiler). 



UNAGIUS Jordan. 



Type: Cryptophthahnus rohustus Fra.nz (1910). 



The name Cryptophthalmus is preoccupied in Crustacea (Rafin- 

 esque, 1812) and in moUusks (Ehrenberg, 1831). Unagius may be 

 substituted for it. Unagi is the Japanese word for eel. 



UROCLES Jordan. 



Type: Megalurus lepidotus Ag. (fossil). 



This name is offered as a substitute for Megalurus Agassiz, 1833, 

 preoccupied in birds (Horsfield, 1820), and for Synergus Gistel 

 (1848), preoccupied in Hymenoptera, both these having the same type. 



VERATER Jordan. 



Type: Oligopus ater Risso = Pteridium atrum FiUppi & Verany. 



Substitute for Pteridium F. & V., preoccupied by Pteridium Sco- 

 poli, 1777, which is a substitute for Pteraclis Gronow, 1763 and 1772, 

 the use in 1772 unquestionably binomial. 



PNICTES Jordan. 



Type: Achiropsis asphyxiatus Jordan & Goss. 



This species of sole described from Goyaz, Brazil, differs from 

 Achiropsis Steindachner and from all other soles in the complete 

 obliteration of the gill opening of the right or eyed side. 



ERREX Jordan. 



Type: Glyptocephalus zachirus Lockington. This species, the 

 "Rex Sole" of the San Francisco fishermen, an excellent food-fish. 



