234 
HORN EXPEDITION—CRUSTACEA. 
Females. 
( 5 ) 
(6) 
( 7 ) 
(8) 
( 9 ) 
(10) 
(II) 
(12) 
( 13 ) 
{ 14 ) 
( 15 ) 
Lenn’th a - h 
100 
100 
100 
100 
100 
100 
100 
100 
100 
100 
100 
b - c - 
30 
31 
31 
41 
35 
37 
29 
X 
CO 
30 
27 
29 
d- e - 
63 
62 
62 
61 
62 
63 
57 
63 
64 
67 
64 
b-f - 
70 
67 
100 
119 
108 
107 
95 
103 
117 
119 
97 
It will be noticed that male specimens are not relatively infrequent, though 
their number is considerably less than that of the females. Miss Lambert, 
B.Sc., of the Melbourne University, has been kind enough to carefully examine, by 
means of serial sections, the reproductive organs of Lepiflurus and Apus, but there 
is no trace of any development of sperm in the ovaries indicating the possible 
existence of hermaphroditism such as has occasionally been noticed in Apus.* 
It will also be noticed that, whereas Apus is extremely common at certain 
times in the central disti’ict, Lepidurus was not found there; on the other hand, 
in the more coastal districts, it is Lepidurus which is common and Apus but rarely 
met with. 
Estheria. 
(2) E. lulraria, Brady. (Figs. 4, 5.) 
Reference—Proc. Zool. Soc., 1886, p. 85, Fig. B. 
Brady’s description is as follows :—“ Valves oblong, compressed, membranous ; 
beak near the anterior extremity, lines of growth aliout twelve; seen laterally, the 
dorsal line is quite straight, ventral convex, anterior extremity broadly-rounded, 
posterior narrowed and somewhat oblique ; seen from above it is much compressed 
behind the middle and shai’ply pointed at the extremity; broadly rounded in 
front. Colour yellowish-brown. Length y’g- of an inch ; height 
Dr. Brady further remarks that he had but a single specimen of the species— 
a dried empty shell which Professor R. Tate sent him from Innaminka, Cooper’s 
Creek. We have therefore described the species more in detail than it M'as 
possible for Mr. Brady to do. 
* Cf., H. M. Bernard, The ApocIidiL', p. 308. 
