]4 SLADEN TRUST EXPEDITIONS TO ABEOLHOS ISLANDS. 
appendages. The epistome is quite truncate anteriorly; the front margin 
fringed with short, thick hairs simihir to those on the rest of the body. The 
second to the eighth thoracic limbs are bi-unguiculate and characterised by 
the development of strong spines on the inner margins of the merus, crirpus, 
and propodus. 
The pleopods are of the typical hemibranchinte type. The exopod of the 
third, fourth, and fifth pairs is two-jointed. In the third pair the margins 
of the endopod and the distal joint of the exopod are fringed with plumose 
setfe. In the fourth and fifth pairs there are no plumose setse, but the outer 
margins of both branehes of the fifth pleopods possess a fringe of simple 
short hairs. The appendix masculina on the second pleopods is longer than 
the branches, with the terminal portion narrower than the rest and slightly 
hooked. 
This species differs from the definition of the genus Cilieceopsis given by 
Hansen (1905) in possessing a vestige of a mesial lobe on the posterior 
margin of the last abdominal somite, and from the type-species C. granidata 
(Whitelegge) and its ally, C. lulnteleggei (Stebbing), in being without a long- 
process from the median portion of the anterior part of the abdomen. In this 
latter character it agrees, however, with Cilicwa stt/Ufera, Whitelegge, and 
C. oriiata, Whitelegge, which Hansen refers tentatively to the genus Cili- 
ca'opsis. It may be noted that both the last-named species show a further 
resemblance to C. daldni in having the posterior margin of the third abdo- 
minal somite produced in the mid-dors;il line. 
I know of no species of the group Cymodocini with which the present 
species can be confused in the form and structure of the abdomen, and I have 
pleasure in associating it with the name of its discoverer. 
Genus Cymodoce, Leach. 
Cymodoce mammifera, IJaswell (?). (PL 3. fig. 35.) 
C. mammifera, Haswell, 1880 (4), p. 474, pi. 18. fig. 1, 1 .r. 
Locality. OtF Wallaby Islands, dredging, two specimens, 12 mm. 
lieitiarks. It is with some doubt that I refer these two specimens to 
Haswell's species, but they agree completel}^ with his short description and 
figures. Of the two specimens, one is apparently an immature male in so 
far as it has a pair of penial filaments on the sternum of the last thoracic 
somite, but no appendix masculina on the second pleopods. The other is a 
female. The species is a typical hemibranchiate sphforomid in the structure 
of the pleopods, and would seem to fall into the genus Cymodoce by the well- 
developed mesial lobe in the abdominal notch, by the absence of a mesial 
process on the abdomen of the male, and by the well-developed endopod of 
