162 Annals of the South African Museum. 



STENOTYPHLOPS, n. g. 



Carapace narrow, eyelobe without visual elements, all five pedi- 

 gerous segments conspicuous, pleon slonder, telson carrying three 

 apical spines. First antenna with both flagella elongate. Second 

 antenna of female four-jointed. First maxilla with unisetose palp. 

 First maxillipeds with terminal joint peculiarly widened at the base. 

 In the female first and second peneopods with exopods, third and 

 fourth having only microscopic rudiments of them. Fifth perseopods 

 apparently wanting. 



Male unknown. 



The generic name, from artroQ, narrow, and ri/</Awi//, blind-faced, 

 is intended to indicate the many points of resemblance between this 

 genus and Platytyphlops, although the typical species in one of the 

 genera has a broad carapace, and in the other a narrow one. The 

 present genus is further distinguished from its ally by having 

 the palp of the first maxillse furnished with a single apical seta or 

 filament, and by what appears to be the unique conformation of the 

 terminal joint in the first maxillipeds. The absence of the fifth 

 perseopods, as a negative character based on a single specimen, will 

 naturally be accepted with reserve, but the degraded condition of 

 those limbs in P. peringwyi is suggestive of a decline through 

 inactivity to extinction. 



STENOTYPHLOPS SPINULOSUS, n. sp. 

 Plate LX. 



The whole surface seems to be more or less densely sprinkled 

 with minute spinules, among which are some that are rather larger, 

 but the close reticulation renders it difficult to make out the 

 arrangement. 



The pseudorostral lobes are slightly upturned, meeting in a point 

 well in advance of the little triangular eyeless eyelobe, from which a 

 keel traverses the middle line far backwards, flanked somewhat 

 behind the centre of the carapace by a pair of raised ridges. 

 The general shape of the carapace is narrowly oval, with sides 

 sharply inflexed. The five pedigerous segments, all dorsally con- 

 spicuous, diminish gradually in width to the fifth, which is no wider 

 than the slender pleon. The telson is about four-sevenths of the 

 length of the peduncle of the uropods, inflated rather more than a 

 third of its length for the anal opening, then converging to its three- 

 spined apex, the margins serrate, and below the middle having three 

 pairs of spines, successively larger but none equalling the apical 



