REPORT ON THE AMPHIPODA. 835 



described, had lost the head and the third uropod ; in both specimens the third and fifth 

 pairs of perseopods were imperfect. 



The specific name alludes to the bizarre configuration of the head and the odd 

 combination of the long and slender gnathopods with the broad hinder perseopods. 



Family CEdi c erid.e, G. 0. Sars, 1882, 



In 1865 Lilljeborg established the Oedicerina as sixth subfamily of the Gam- 

 maridse, distinguishing it from the other subfamilies as having, " Antennae superiores 

 flagello appendiculari carentes. Oculi compositi. Pedes trunci (thoracici) 7:mi paris 

 antecedeutibus multo longiores, segmento ultimo (ungue) longo, recto et stiliformi." To 

 it he assigned the new genus Ocdiceropsis, together with Oedicerus, Kr0yer, Monoculodes, 

 Stimpson, and Kroyera, Spenee Bate. In 1870 Boeck made the Oedicerinse the tenth 

 subfamily of the Gammaridae, placing in it Oediceros, Acanthostepheia, Monoculodes, 

 Hcdimedon, Pontocrates, Aceros, Halicreion, Oedice-ropsis, Paramphithoe. In 1872-6 

 he still placed this subfamily among the Gammaridse,^ with the same definition as before, 

 but excluding the genus Paramphithoe as having been previously enrolled by a mistake. 

 Nevertheless Pleustes, Speuce Bate, which Boeck here adopts in preference to Par- 

 amphithoe, Bruzelius, took its place as the ninth genus of the Oedicerinae (p. 299). But 

 later on (p. 496) Boeck explains that this was only an error passed on from the earlier to 

 the later work. In 1882 Sars changed the subfamily into a family, with the name 

 Oediceridae, placing in it the same genera as Boeck had done, with the exception of 

 Acanthostepheia, which did not happen to be included in the Norwegian fauna. In J. S. 

 Schneider's preliminary revision of the Norwegian Oediceridae, the same limits are adopted 

 for the family, though Schneider suggests that a new genus should be formed for some 

 specimens which he refers with much hesitation to Halimedon saussiirei, Boeck. All 

 the genera above named, with the exception of Aceros, are included along with 

 several others in the subfamily Phoxina, Spenee Bate, by Gerstaecker in 1886, Hali- 

 medon being made a synonym of Mo7iocidodes, and Acanthostepheia of Oedicerus. 



Boeck gave the following definition of the Oedicerinse : — 



" Up^jer Lip apically insinuate. 



" Mandibles very robust, apically broad, more or less dentate ; the accessory plate 

 also more or less dentate ; the spine-row with the spines simple but strong ; the molar 

 tubercle not very large ; the palp long; three-jointed. 



" The Lower Lip broad ; the inner lobes large. 



1 On page 74 of Boeck's great work the Oedicerinse are the fourth subfamily of the Gammarida?, in front of the 

 Epimerinpe ; on p. 254 they follow the Epimerinai as fifth subfamily, being numbered as •' Subfamilia VI.," owing to 

 the accidental interposition of the Iphimtdina; in front of them. 



