188 TAGE SKOGSBRRG 



homologization of the bristles, I have, for the sake of brevity, simply denoted the latter by 

 letters in the descriptions that follow. 



First antenna: — The bristles on the original seventh joint: The one situated 

 anteriorly = „the a-bristle": tlie one placed distally-medially and somewhat anteriorly = ,,the 

 b-bristle"; the posterior-distal one = ,,the c-bristle". The four bristles on the original eighth 

 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-bristle"; of the two 

 distal-medial bristles, the anterior one is called ,,the f-bristle", the posterior one = ,,the 

 g-bristle"; see the fig. 16 of this limb of Oypridina (Vargula) norvegica. 



Mandible: — The ventral bristles on the basale have in the following descriptions 

 been denoted by the following letters: The group of bristles proximally-ventrally-medially 

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

 the bristles situated somewhat pro.ximally of the middle of the joint = ,,the c-bristles"; those 

 situated somewhat distally of the middle of the 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- medially 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 across the outside of the joint, somewhat posteriorly and somewhat 

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

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

 group = ,,c-bristles"'; the remaining bristles, situated posteriorly-distallv on the joint, some- 

 what laterally = ,, d-bristles". 



Fifth limb: — Second joint of the exopodite: The bristles in the group which 

 was interpreted by G. W. MlJLLKU 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 tlie joint = ,, c-bristle"; the bristle on the anterior side of the joint 

 close to the 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 proximally 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 tlie literature are very incompletely and vaguely 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 tliat, compared with the sub-family Philomedinae, it comprises 

 rather heterogeneous elements. 

 .(/•(■ rlir i^rncni Are the genera that have been so far established of this sub-family in tluMr 



natural units? modern conception to be loolced upon as natural. \voll-(l(>fined svstcmatic units? 



