The OpisthobrancMata of Soutli Africa. 45 



of which there were no ripe genital elements. The whitish anterior 

 genital mass 5-5 mm. long ; the long spermduct (fig. 25a) forms a 

 coil of fine windings ; the penis (fig. 256) cylindrical, 5 mm. long, the 

 glans moreover 2 mm., projecting in the thin prasputium (fig. 25c), 

 absolutely unarmed ; the spermatotheca 2 mm. in diameter, sperma- 

 tocyst half as large. 



The generic position of this form in the system of the Dorididse, 

 as hitherto framed, seems very uncertain. The want of armature of 

 the lip disc, the nature of the rasp and the unarmed penis would 

 seem to denote an affinity to Archidoris, but the habitus is quite 

 different and the back quite even. 



Staurodoris, Bgh. 



K. Bergh, System d. nudibranchiaten Gasteropoden, I.e., 1892 



p. 1093. 

 EHot, Nudibranchiata. Fauna and Geography of the Maldive and 



Laccadive Archipelagoes, ii., 1, 1903, pp. 557-558.— On some 



Nudibranchs from East Africa and Zanzibar. Proc. Zool. 



Soc. of London, 1903, ii., pp. 363-364. 



Corpus non durum, subdepressum, dorso tuberculato ; foveee 

 rhinophoriorum sicut fovea branchialis tuberculis marginalibus elevatis 

 valviformibus defensse ; tentacula brevia crassa, sulco marginali 

 externo ; branchia e foHis sat numerosis simpliciter pinnatis 

 formata. 



Penis et vagina inermes. 



The genus belonging to the family of the Archidoridid® has, like 

 the other genera, the lip disc merely covered by a simple cuticula, 

 the radula shows the narrow rhachis naked and the pleurge with a 

 series of hook-formed plates. It differs from the other genera by the 

 protecting valves of the rhinophores and of the gill ; the leaves of 

 the last are, moreover, simply pinnate. 



To the genus belong : 



1. St. verrucosa (Cuv.). 



St. pseudoverrucosa , Jher. 

 St. Januarii, Bgh. 

 St. Bertheloti (d'Orb.). 

 St. {juv. ?) hicolor, Bgh. 

 St. ocelligera, Bgh. 

 21. mediterr., atlant. or. et occ. 



2. St. cVOrhignyi (Gray). 



Hah. ? 



