IS."^ t.\(;h SK(KiShi;i!(; 



hoiuiiliisiization of the bristles. I liave, for tho sake of l)n'vitv. simplv donolcd tlic l.ittrr hv 

 letters in the ilescriptions that t'ollow. 



First antenna: — The i)ristles on tln< original sevenll: joinl: Tl we situated 



anteriorly - ..the a-brislle"; tlie one placed distally-ini'dmlK- and sdinrwhat antcrioilv ,,the 

 b-bristle"; the posterior-distal one ..the e-bristle". Tlir tour hiistles on the original I'iohth 

 joint : The anterior of the two simple sensory filaments which are situated laterally, close to each 

 other, is called ..the d-bristle". the posterior one of them is called ..the e-hristle"; of the two 

 di.stal-medial bristles, the anterior one is called ..the f-bristle", the posterior one ..the 



g-bristle'"; see the fig. IH of this limb of Cypridina (Varqida) norveqica. 



.M a n (1 i 1) 1 (>: - Tlie viMitral bristles on the liasale have in the following descriptions 

 been denoted 1)\' the lollowinn; letters: The grou]) of bristles proximally-ventrally-medially 

 = „the a-bristles"; the solitary bristle, somewhat distally of this group = ,,the b-bristle"; 

 the bristles situated somewhat proximallv of the middle of the joint - ..the c-bri.stlcs"; those 

 situated somewhat distally of the middle of tiie joint = ,,the d-bristles". Of the bristles on the 

 second endopodite joint the comparatively short ones, armed with more or less powerful secon- 

 dary bristles and situated anteriorly-niedially on the joint are called after what is presumably 

 their function often simply ,, cleaning bristles". 



Maxilla: — Bristles of the end joint: The group whose (often four) bristles 

 form a row placed acro.ss the outside of the joint, somewhat posteriorly and somewhat 

 proximallv to the distal edge of the joint is called .,a-bristles"; the group distallv- 

 anteriorly = .,b-bristles"; the group distally-medially, somewhat behind the last-mentioned 

 group = ,,c-bristles''; the remaining bristles, situated posteriorly-distal ly on the joint, some- 

 what laterally = ,,d-bristles". 



Fifth limb: — Second joint of the exopodite: The bri.stles in the group which 

 was interpreted by G. W. MCLLKH as a ,, tooth", comparable morphologically with the ..main 

 tooth" on the preceding joint, are called ,, a- bristles"; the irregular group of bristles somewhat 

 outside and in front of the ,,a-bristles" — ,,b-bristles"; the single bristle close to this group 

 on the posterior side of the joint = ,,c-bristle"; the bristle on the anterior side of the joint 

 close to tlie third exopodite joint = ,, d-bristle". 



Seventh limb: — Of the teeth of the end comb the distal ones, those of the more 

 or less extended type, are denoted ..distal teeth", the ones situated proximallv to the former 

 are called ..proximal teeth". 



Remarks: — Although a great number of the forms of this sub-family that have hitherto 

 been introduced into the literature are very incompletelv and vaguelv described, we may, all 

 the same, say with rather great certainty even now that this group is, from a classi- 

 ficatory point of view, to be regarded as being fairly uniform. On the other hand it must, 

 however, be pointed out that, compared with the .sub-family Philomedinae, it comprises 

 rather heterogeneous elements. 

 Are the genera Are the genera that have been so far established of this sub-family in their 



modern conception to be looked upon as natural, well-defined systematic units? 



natural units? 



