2 BULLETIN 150, UNITED STATES NATIONAL MUSEUM 



mediate forms. Prognurus Jordan and Gilbert and Bathyphasma 

 Gilbert are reduced to the synonomy of Careprocius. Prognurus was 

 based upon the forked caudal, but with the discovery of Careprocius 

 furcellus, a species with a slightly forked caudal, the gap between 

 Prognurus and Careprocius is closed up. BatJiypTiasma was based 

 upon the character of the teeth, but these in no way differ from the 

 teeth of several species of Careprocius. Amitra Goode and Hil- 

 gendorjia Goode and Bean are referred to the synonomy of Para- 

 liparis. Amitra is described as differing from Paraliparis solely in the 

 presence of pseudobranchiae. I have been unable to demonstrate 

 the presence of pseudobranchiae in Amitra liparina and doubt their 

 presence in any of the specialized species of the famUy. Hilgen- 

 dorjia is supposed to differ from Paraliparis in the forward extension 

 of the dorsal ridge and possibly in the character of the pectorial fin. 

 These characters do not appeal to the writer as being of generic 

 value. Crystallichthys Jordan and Gilbert and Gyrinichihys Gilbert 

 are provisionally retained as genera. CrysiallicMhys was described 

 as differing from Liparis chiefly in the single nostril. I have shown 

 that it agrees with Careprocius in the character of nostril and teeth. 

 It is retained as a genus because of the peculiar slitlike pupil and the 

 coloration. Gyrinichthys differs from Careprocius solely in the re- 

 duced gill slit and will have to be reduced to synonmy upon the dis- 

 covery of a species of Careprocius with a gill slit but slightly smaller 

 than that of a number of known species. 



One new genus (Temnocora) is described in this report. Five 

 new genera have recently been described and should be mentioned 

 here. Gilbert and Burke (1912) describe the three remarkable 

 genera, Elassodiscus, Acantholiparis, and Necioliparis. Burke (1911) 

 describes the genus Polypera. Gilbert (1915) describes the genus 

 Lipariscus. 



Species. — In the present report 114 species (including the appendix) 

 are recognized. Specimens of 90 of these species have been examined 

 by the writer. Many of the species are represented by but a single or 

 few individuals; 29 species of those examined are represented by a 

 single individual, 13 species by 2 specimens each, and 64 species by 5 

 or less specimens each. This lack of material has caused to be left 

 undecided the fate of a number of doubtful species. Other writers 

 may disagree as to the importance of certain variations and of the 

 validity of some of the species recognized here. Several doubtful 

 species have been recognized and so indicated. When a name is in 

 print it is best to recognize it until it can be reduced to synonomy 

 with absolute certainty. With a series of types before one, the 

 species which can not, or only doubtfully, be identified by the de- 

 scriptions appear distinct. The more we know of the species and the 

 more species we know the greater the difficulty of distinguishing 



