Transactions of the Society. 



Spongovostox schldferi Burr. 



Generally resembles the preceding species, apparently" offering- 

 differences only in the form of the chitin-plates (PL I, fig. 14). 



Spongovostox sp. {" Sparatta sp." of Zacher, Zacher's Fig. 2.) 



The specimen is from Kamerun, but only the apical portion is 

 shown, but, from his silence, the sponges are probably absent. The 

 externally concave, acute metaparameres are typical of the group ; 

 the preputial sac is a small series of denticulations ; the ductus 

 ejaculatorius ends in a dilated chitin-plate. 



Spongovostox sp. (Zacher's " Sparatta sp.," Fig. 20, 

 from Kamerun.) 



The form of the parameres and the presence of the sponges recall 

 S. ruber, the metaparameres being narrow and recurved ; the virga 

 is not shown. 



Spongovostox quadimaculatus Stal. (Specimen from Entebbe.) 



Metaparameres very broad at base, and inner margin straight, 

 but rapidly narrowing by concavity of outer margin ; tips acute ; 

 virga long, with fibrous chitinous armature, and a fine denticulate 

 pad near the apex ; spongiform structures weakly developed, but 

 distinctly visible (PI. I, fig. 10). 



Labia cnrvicanda Motsch. 



Unfortunately, the only specimen which I have mounted is 

 somewhat damaged, and the structure obscure. It is in erection, 

 the end of the virga extending far beyond the prseputial sac, the 

 armature of which I am unal)le to discern. One metaparamere is 

 broken, but the other is a typical, narrow, acuminate, slightly 

 sinuous plate ; the hinge is very weak (PI. II, fig. 1). 



Labia, marginalis Thunb. 



Here the metaparameres are narrow and lanceolate, gently in- 

 curved at the tips ; the virga is very long, nearly four times as long 

 as the metaparameres, tapering at each end, and broader in the 

 middle ; at the base there appears to be a dilated thin chitinous 

 plate, and a series of minute denticulations. There are no lateral 

 sponges (PI. II, fig. 2). 



