BÜDDE-LUND, ISOPODA. 13 



licies iiüimtc s(|ii;imata. Oculi majores, scmiglobosi ; ocelli viginli vel pliires, inajorcs. 

 Anlcmia> graciles, dimicliuin corpus longiludine sujierantes; scapi arüculus 2. loiigus, 

 gracilis, quam articulus ■[■. vi\ hrovior, quam arüculus 3. longior, articulus 5. arliculis 

 3. et 4: uiiilis longiludine ;v(|ualis. Flagellum gracilliiuum, quam hrcvior 1. triplo vel 

 plus articulus articulus 2. Kpistoma ante subplanum, vcrticale, marginem frontis lamina 

 transversa supra valde superans. Clypeus utrinque in lobos triangulos, acutos productus. 

 Linea verticalis, marginalis capitis utrinque ante oculos producta, cum lamina einstomatis 

 conjuncta. Trunci segmentum 1. epimeris validis, revoluüs, post subtruncatis, angulo 

 exteriore paulum extroverso; epimera segmentorum 2. — 7. magna, oblique tetragona, 

 post sensim obliquiora; segmenta 1. 2. 3. subtus ad basin epimeri dente minuto, articulalionis 

 causa inslructa. C,auda> segmenta 3. 4. 5. epimeris longis, triangulis, apicibus acutio- 

 ribus, segmenti 5. valde divergentibus. T eis um nonnihil longius quam latius; basis l)revis, 

 medium contractum, apex tetragonus, longus, post profunde ernarginatus. Uropodum 

 scapus plus du|)lo longior quam latior, ad apicem angustatus, triangulus, apice acuto; 

 exopoditum lateri interiori scapi procul ab apice insertum, elongatum, gracile, apicem 

 scapi non attingens; endopoditum breve, telso multo brevius. Unicolor, albide-flavus. 

 Long. 8 — 9 mm. Lat. 4,5 — 5 mm. 



Patria: Several specimens of this species were foune in Ihe caves at Mkulumusi 

 pr. Tanga, in the montli of June 1906. Also the expedition of Mr. Alluaud found 

 specimens of this species in the same locality, Nov. 1903. 



A series of Terrestrial Isopods has in the course of time been collected from 

 Central-Africa, that in consequence of their exterior habitus, especially on account of 

 their ability of conglobalion, have a great similarity to the species of the genus Arma- 

 (Ullo. They are easely separated, however, by the form of the telsum which varies to 

 a great extent from the straight sided triangulär form to an elongate acuminate triang- 

 ulate or rightangular Prolongation, but are never constricted in the middle in the form 

 of an hour-glass as in the case with Armadülo. 



Gerst.bcker founded the genus PeriscijpMs upon one of these central african species, 

 and a second species was taken by Dollfus as type for the genus Synarmadülo. In 

 the course of time when I received new species I referred them either to one or the 

 other of these genera, and to which I have added below a third genus Microcereus. 



It has offen been very diflicult for me to find the correct position for new species, 



but have upon my more recent researches been able to make more ditmite divisions, 



and similarly as in the genus Periscyphis I give below a complete description to the 



two other genera. 



Periscyphis. 



B.-L. 4 p. 10. 

 I know altogether 14- species which I refer to this genus, which are found dislrib- 

 uted over the hole N. E. Africa, from Egypt to Abessinia, Djibouti, Somali, British- and 

 Gcrman-East-Afrika. Eight species are described: P. trivialis Gerst., P. convexusB.-h., 



