332a Annals of the South African Museum. 



Lower lip, outer margin of outer lobes deeply indented, inner 

 lobes longer, apices setose. 



Mandibles, apex of left bilobed, one of the lobes distinctly 5- 

 dentate, the other entire, apex of right simple, entire, molar 

 prominent, denticulate. 



First maxilla, apex with ca. 8 spines and a few subterrninal setae, 

 backwardly directed palp strongly developed, with 10 long apical 

 setae. 



Second maxilla small, triangular, apex rounded, with 1 seta. 



Maxilliped, 2nd joint half as long again as broad, with long apical 

 setae, 3rd and 4th subequal, both apically setose, 5th broader than 

 long, inner margin setose, 6th ovate, equal to 3rd and 4th together, 

 inner margin setose, inner plate reaching to middle of 4th joint, 

 inner apex with 2 outstanding setae, epipod oval, apex produced into 

 a narrow pointed process. 



First peraeopod (gnathopod) similar in both sexes, incisive edge on 

 thumb of 6th joint with a strong triangular process near base and a 

 less distinct one near apex, 7th joint evenly but not strongly curved. 



Second peraeopod, 2nd joint long and slender, 6th joint slender, 

 with straight unguis. 



Third to seventh peraeopods similar to 2nd, but 2nd joint 

 becomes gradually stouter, 5th joint slender in 3rd and 4th peraeo- 

 pods, stout in 5th, 6th, and 7th, 6th joint small, with minute unguis 

 in 3rd and 4th peraeopods, in 5th, 6th, and 7th stout, with strong 

 hooked unguis, 4th joint in all these peraeopods with 2 rows of stout 

 spines, 6 in each, on lower apical surface. 



All three pairs of pleopods, outer margin of smaller branch 

 completely fringed with setae. 



Uropods 4-jointed, 1st and 2nd joints subequal, 3rd a little shorter, 

 4th still shorter. 



Length : 6 mm. ; breadth : 1'25 mm. 



Colour : Greyish-white, head, pleon and median line on peraeon 

 darker, slate-colour, eyes dark grey-black. 



Locality : Dassen Island. April 1897. (E. M. Lightfoot.) $ $ 

 and ? ? with ova. Buffel's Bay, False Bay. 28/9/13. (K.H.B.) 

 1 $ . Low-tide. (S.A.M. Nos. A2550 and A2547.) 



This species is intermediate between, and combines the characters 

 of T. cavolinii, M. Edw., and T. pliiletacrus, Stebbing, whence the 

 specific name. In the shape of the cephalic segment the present 

 species is nearest T. cavolinii, which it also resembles in having 

 several setae on the palp of the first maxilla and a complete fringe 

 of setae on the smaller branch of the pleopods. On the other hand, 



