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376 RECORDS OF THE S.A. MUSEUM 
GYNODIASTYLIS AMPLA Sp, NOY. 
Female with developing marsupium. Integument calcified, opaque, with fine 
but distinet reticulate patterning. 
Carapace two-sevenths of total length of animal and less than one-fourth as 
long again as pedigerons somites together; it is two-thirds as long as greatest 
width, which is equal to the depth. The most prominent features of the sculptur- 
ing are (1) a straight longitudinal ridge running back from below antennal tooth 
for greater part of length of carapace; (2) a pair of dorsal, longitudinal ridges 

Wig. 12, Gynodiastytis ampla, type female and malo; lateral yiews and cephalothorax from 
above ( 13%). 
on ‘posterior half, and meeting the raised posterior margin of carapace; (3) a 
depression on each side for anterior two-thirds of length: the upper edge of this 
hollow is marked by a fold which is most apparent when the carapace is viewed 
from above. There is 4 shallow eoncavity on each side of frontal lobe and the 
hinder parts of the sides are marked with faint pits, the interspaces forming 
incipient: wavy ridges, Antero-lateral margin markedly concave; antennal angle 
acute, and margin below it finely serrate, Pseudorostrum long and pointed, the 
lobes meeting in front of ocular lobe for a distance equal to about one-fifth length 
of carapace, slightly gaping near apex, Sutures of frontal lobe distinct; ocular 
