1922] Brolemann: Female Paraiulids 301 



Of course the point under discussion will have to be re- 

 examined when the American Isohatince and the Asiatic fauna 

 will have become better known. Amongst the Japanese Diplo- 

 pods already recorded is Attems' genus Karteroiulus, the male 

 of which has the fourth segment open, whereas it is fused with 

 the corresponding sternite in the female. But judging from the 

 rough outhne pubhshed by Attems (1. c, PI. 2, Fig. 34), the 

 vulvas seem more closely related to. those of the impressus 

 group, as the "auf der Oralseite aufgeschlitzen Chitinring" 

 probably answers halves of the synoperculum described in the 

 preceding pages. Nothing is known of the female Kopidoiulus 

 Att., the male of which is said to have the fourth segment open, 

 as in Karteroiulus. 



EXPLANATION OF ABBREVIATIONS USED 



rt = Apodematic gutter of Mound. o = oviduct. 



6 = Hood of operculum. ot = outer valve of Mound. 



C=Coxite. P2, P3 = Second, third pairs of limbs. 



d = Diverticulum of Vulvae. p = Postmentum . 



G = Gula. 7? = Stipes of gnathochilarium. 



//"= Heart-shaped projection of oper- r = Ridge of Mound. 



culum or synoperculum. 5 = Sternite. 

 A = Horse-shoe plate or thickening of 5 = Shield of Vulv«. 



Mound. r=Telopodite of limbs. 



* = Intermentum. r= Tracheal stalks. 



jy = Inner valve of Mound. m = Ventral dimples of segments. 



/=Ventral lobes of segments. i; = Valves of Mound. 



Af=Moimd of vulvas. PF= Vulvae. 



= Operculum of vulvae. F= Synoperculum of Vulvce. 



