CUMACEA PEOM THE COPENHAGEN MUSEUM. 385 



p. 46, pi. V. figs. 82-86). The unique type-specimen of that species, like the two 

 smaller of the specimens described above, has minute exopods on the third and fourth 

 pairs of legs, and, like the smallest, is without appendages on the last thoracic somite ; 

 on the other hand, it possesses a well-developed exopod on the third maxilliped where 

 the present specimens have only a rudiment. The new species further differs in 

 having no apical spines on the telson, a character in which it approaches Pachystylis 

 rotundata of Hansen. 



Only the discovery of adult specimens will allow the generic position to be decided, 

 but the characters of the form here described are so striking that there can be little 

 difficulty in recognising the species again. 



Occurrence. — Gulf of Siam, " Between Koh Mesan and Cape Liant, 9 fathoms," 

 " Koh Kam, 10 fathoms," " Koh Chuen, 30 fathoms." Th. Mortensen Coll., Copen- 

 hagen Museum. Co-type in British Museum. 



DiASTYLIS mSULARUM Calm. 



Leptostylis (?) insularum. Caiman, Ann. Mag. Nat. Hist. (8) i. p. 234, figs. 1-5 a (1908). 

 Occurrence. — "Lyttleton Harbour, New Zealand, 1-5 fathoms, 8/97. H. Suter 

 Coll." Copenhagen Museum and British Museum. 



