
432 RECORDS OF THE S.A. MUSEUM 
ALLODIASTYLIS. JOHNSTONI sp. NOV. 
Ovigerous female. Carapace as described for cretata, to which the species is 
closely allied; it is fully one-third of total length of animal and much. longer 
than pedigerous somites together, Rostral siphons very long and wide. 
Pedigerous somites not differing markedly in dorsal length, but successively 
becoming longer; second with pleural parts a little expanded forwards; third 
expanded fore and aft on sides, but second and third legs separated by a space 
no greater than that between third and fourth. 





a ES 

me TAR ; 
(SET LYI 
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i 
a) 
Fig. 53. <Allodiastylis johnstoni, types female and male; lateral views and (ceph.) sephalo- 
thorax from above (X 42). 
Pleon cylindrical, the first to sixth somites not differing much in length, the 
fifth little longer than sixth, which is broadest in distal half, where it is half as 
wide again as long; telson cylindrical, with distal part suddenly tapering to the 
narrowly rounded apex which has a pair of rudimentary spines; it is nearly twice 
as long as the sixth pleon somite, 
First antenna much as in genotype, witha distal spine below first two joints, 
which together are only about two-thirds as long as the elongate third segment; 
flagellum three-jointed, one-third the length of last peduncular joint; accessory 
lash also three-jointed, fully half as long as main flagellum. 
Basis of third maxilliped short, broad distally, where the external part is 
forwardly produced; it is shorter than the first four joints of the palp and its 
