XLIV. TERRESTRIAL ISOPODA, II. 



By Walter E. Colunge, D.Sc, F.L.S., etc., 

 Research Fellow of the University of St. Andrews. 



(Plates XLIX, L.) 



The specimens here described were found in a tube contain- 

 ing a number of small land shells. One of them is a new species 

 referred to the genus Cubaris, Brandt; the other I am unable to 

 place in any known genus. I am, therefore, describing a new 

 genus to which I have given the name Rotungus. 



Gen. Rotungus, gen. nov. 



Body oblong oval, strongly convex, smooth. Cephalon small, 

 convex, lateral and median lobes prominent ; epistoma with 

 median vertical ridge. Eyes large, situated dorsally. Antennae 

 slender^ 4th and 5th joints elongated, setae short and thick ; fla- 

 gellum two-jointed, ist joint short, expanded distally, 2nd joint 

 much longer, terminating in a style. First maxillae with outer 

 lobe terminating in a series of curved spines, inner lobe narrow, 

 flat, with two setaceous spines on the inner border. Segments of 

 the mesosome strongly convex, ist broadly expanded laterally and 

 partly surrounding the cephalon, lateral plates of 2nd to 5th 

 segments excavate, 6th and 7th almost truncate, posterior angles 

 produced backwards. Maxillipedes with small terminal lobes. 

 Thoracic appendages stout and of medium length, setose, ist 

 appendage with numerous tridentate setae. The lateral plates of 

 the metasome are somewhat flattened and turned inwards, the 

 median portion of the segments being strongly convex. Uropoda 

 extending beyond the telson, basal plate broader anteriorly than 

 posteriorly ; exopodite cuneiform, articulating at the posterior 

 margin of the basal plate, endopodite longer than exopodite, ar- 

 ticulating at the inner anterior border. Telson elongated, roughly 

 triangular, posterior margin truncate, anteriorly broader than the 

 length. 



This genus is distantly related to M esarmadillo , DoUf.^, 

 and Saidjahus, Budde-Lund*, it also exhibits a remote relation- 

 ship to Gelsana, Budde-Lund^, and Sumniva, Budde-Lund*, but 



^ Ann. Soc. ent. France, 1892, p. 385. 



2 Rev. Crust, hop. Terr., 1904, p. 49. 



■^ Sjostedts Kilimandjaro-Merii Exped. 21 Crustacea, 2 Isopoda, igio, p. 6, 

 t. i. 



* Rev. Crust, /sop. Terr., 1904, p. 48, and Isopoda von Madagaskar and 

 Ostafrika in " Voeltzkoiv Reiseergebnisse" , Bd. iii. Abhandl. Sencheiiberg. Gessel- 

 schaft, 1908, Bd. xxvii, p. 267. 



