1922.] 



vS. Kemp : Notes on Crustacea Decapoda. 



245 



orbit. The lower border is convex and bears three smaller teeth 

 in its distal half. 



Text-fig. 78. — Thaumastecaris streptopus, sp. nov. 

 Anterior part of carapace, rostrum, etc 



The carapace is smooth, without trace of areolation or sculp- 

 ture. The orbital angle is acute ; below it there is a sharp antennal 

 spine, but both supra-orbital and hepatic are missing. The eyes 

 are large ; the ocular spot 

 is merged in the cornea 

 and the breadth of the 

 cornea is greater than 

 that of the stalk. 



The antennular pedun- 

 cle (text-fig. yga) extends 

 nearly to the end of the 

 antennal scale. The later- 

 al process does not quite 

 reach the middle of the 

 basal segment ; the spine 

 at the outer distal angle 

 is long and the margin 

 between this spine and 

 the articulation of the 

 second segment is a little 

 convex. The free portion 

 of the shorter of the two 

 rami composing the outer 

 antennular flagellum is 

 much shorter than the 

 fused part, the latter com- 

 prising 9 segments. The 

 antennal scale (text-fig. 



796) is not quite 3 times as long as wide ; the outer margin is 

 slightly concave and terminates in a spine which reaches almost 

 to the end of the lamella. 



Text-fig. 79. — Thaumastecaris streptopus, 

 sp. nov. 



a. Antennule. 



b. Antennal scale. 



