8 



ARKIV FÖR ZOOLOGI. BAND 7. N:0 26. 



Epistom. latera ante oculos paulum introdiicta; epistom. 

 medio fronte adcretum, nullo margine discernente. 



Linea marginalis verticalis utrinque fere ad epistoma 

 produota. 



Trunci segmentum 1 in angulo priore sulco brevi, paulum 

 a margine laterali distante; ipse margo pertenuis. 



Margo posterior segment! 1 utrinque fortius incurvus, 

 angulis posticis acutioribus retroductis. 



Margo posterior segment. 2. 3. utrinque incurvus, angu- 

 lis posticis obtusioribus, leviter retroductis. 



Margo posterior segment. 4. 5. 6. medio incurvo, angulis 

 posticis acutis. 



Fig. 5. Periscyphis brunneus ^"''V' 

 [maxilliped. apex]. 



Epimera caudae brevia, segment, o subdivergentia. 



Telsum satis latius quam longius, medio breve et an- 

 guste triangulo producto, apice obtuso. 



Uropod. scapus oblonge tetragonus. 



Exopoditum parvum, duplo longius quam latius, fossse 

 medise lateris postici insertum. 



Endopoditum gracile, telso non brevius. 



Longitudo 6 [mm.]. Latitudo 2,8 [mm.]. 



Subunicolor brunneus, pedes, pleopodes, uropodes albidi. 



Patria: East Africa, N. of Guaso Nyiri about 1° N. lat. 

 under the sheaths of palmleaf-stalks. ^7^ 1911 Lönnberg. 



[This genus Periscyphis embraces a number of species 

 which are found distributed över the north-eastern part of 

 the Ethiopian continent from Egypt to Abyssinia, Somaliland. 



