564: GEOFFREY SMITH. 
Genus 1. Koonunga (Sayce 10 and 11). 
The cephalic segment is about equal in length to the two 
following: segments: there is a short transverse sulcus on 
each side at about the middle distance, posteriorly to which 
the margins are produced downwards and inwards. The 
thoracic and abdominal segments are all subequal in size, 
the sixth abdominal segment not being longer than the 
segments preceding it. There is no dorsal flexure. The 
telson is very short and does not equal in length the uropods. 
The basal joint of the uropods is nearly as long as the 
rami. 
K. cursor (Sayce 10 and 11). (Text-fig. 2.) 
The frontal margm of the head is truncated and not 
produced into a projecting cone (text-fig. 50). There are no 
TrExtT-FIG. 50. 
50. 
Koonunga cursor. Anterior region of head with sessile eyes. 
setze uponit. The minute sessile eyes are situated at the angles 
of the frontal margin. The body is carried flat and unflexed. 
There is no median triangular piece marked out on the head. 
The head segment is as long as the two succeeding segments 
and there is a marked transverse sulcus on each side. The 
succeeding segments, both thoracic and abdominal, are all 
subequal. ‘The first antenne has the first segment distinctly 
stouter and longer than the two succeeding segments. 
The inner flagellum is six-jointed, and in the male a peculiar 
sensory appendage is present, furnished with spiral hairs 
(text-fig. 51). The otocyst is circular. The second antenna 
is without a scale (text-fig 8). 
The mandible is without a molar lobe, and the terminal 
