Additional Notes on South" African Phyllopoda. 21 



length and thickness. The form of the head is much as in 

 the male of S. gracilis, and the frontal lobe exhibits a similar 

 simple conical form. 



The eyes appear somewhat thicker, and are pronouncedly 

 claviform in shape. 



The prehensile antennæ (see fig. 6) are of considerable 

 size, and, when fully extended, almost equal in length the 

 whole anterior division of the body. They are however, 

 as a rule, bent in beneath the body in a sigmoid manner. 

 As in the other species of the genus, they are each com- 

 posed of 3 successive sections, a thick muscular basal part 

 carrying at the end inside, a strong curved claw, a very 

 flexible cylindrical median part, and a dilated, hand-like 

 terminal part. It is especially in th« structure of the latter 

 part (see fig. 7) that the present species differs so con- 

 spicuously from the other South African species. It is 

 greatly dilated, and the 2 projections representing the digiti 

 of the chela, are much more complicated than in the above- 

 named species. The outer dactylus is broadly latninar at 

 the base, and projects into 2 unequal lappets, the lower of 

 which (the animal being supposed to occupy its natural 

 attitude, with the belly upwards) is regularly lanceolate, the 

 upper much longer and terminating in a thin flexible lash. 

 Between the two is a single short dentiform projection, and 

 outside the dactylus, the hand projects in an acuminate 

 appressed lobe. The inner dactylus is more simple in struc- 

 ture, being rather narrow and bent in, so as to cross the 

 outer. It has at the base inside, a short dentiform projection, 

 and is transversely truncated at the tip. 



The branchial legs (see fig. 8), on the whole, resemble 

 in structure those in S. gracilis; but the basal plate is not 



