12 
AUSTRALASIAN ANTARCTIC EXPEDITION. 
Remarks. —This specimen is rather small for positive determination, but is in fair 
accord with the description of Hoyle’s 0. duplex, from Twofold Bay, Australia. The 
following are the more important of the observed discrepancies :— 
(1) The specimen shows only one instead of three tubercles over each eye. 
(2) Though for the most part smooth, there are places where the dorsum shows 
faint traces of papillation. 
(3) I find no evidence of the existence of “ an interrupted ridge. 
along the ventro-lateral margin of the body.” 
(4) The color is a dark slate grey above, giving way laterally and ventrally 
to a light brownish cream. 
As a possible future aid in confirming or rejecting the identification, a portion of 
the radula is illustrated in text fig. 5. 
Measurements: mm. 
Total length. 100 
Tip of body to dorsal base of umbrella. 32 
Length of body (dorsal). 24 
Width of body. 19 
Width of neck. 10 
Width across eyes. 14 
Length of funnel... 9 
Mouth to tip of right dorsal arm. 64 
Mouth to tip of left dorsal arm . 64 
Mouth to tip of right second arm . 71 
Mouth to tip of left second arm. 72 
Mouth to tip of right third arm. 68 
Mouth to tip of left third arm . 66 
Mouth to tip of right ventral arm. 71 
Mouth to tip of left ventral arm . 68 
Length of umbrella between dorsal arms. 16 
Length of umbrella between ventral arms.. .. 17 
Genus Moschites Schneider, 1784. 
A list of the described species of this genus, with an indication of their known 
distribution, is as follows :— 
1. M. cirrhosa (Lamarck, 1799) . Norway to Mediterranean. 
2. M. moschata (Lamarck, 1799) . Mediterranean. 
