70 LIVERPOOL BIOLOGICAL SOCIETY. 
FAMILY CYMBASOMATIDA. 
Cymbasoma herdmant, n. sp. (Pl. I., figs 10 to 12). 
Length 1-10th inch. Cephalothorax nearly the same 
width throughout, truncated at each end, five jointed, the 
first joint being nearly equal in length to the remaining 
four. Anterior antennee of male (fig. 11) five jointed, 
strong and muscular—the fourth joint being nearly equal 
in length to the preceding three; there is a hinged joint 
between the fourth and terminal. There are several spines 
and sete throughout the antenne, the apex bearing a 
terminal claw. First four pairs of swimming feet alike in 
structure (fig. 12), the basal joint very large. Both 
branches three jointed, and clothed with strong spinose 
sete. Abdomen of male five jointed, gradually getting 
smaller, the fifth bemg wedge-shaped laterally. Caudal 
segments divergent and stumpy, a little longer than broad, 
each terminated by six spinose sete. 
One specimen only, a male, was found in an autumn 
night’s tow-netting, taken off Puffin Island; and I have 
since found another in a tow-net gathering sent from 
Malta by Dr. Bruce. The only hitherto known species of 
this genus, C. rigidum, Thompson,* was taken by tow-net 
off Teneriffe. k 
It is with peculiar pleasure that I name this species in 
honour of my friend Professor Herdman, the founder of 
Puffin Island Biological Station, to whom I am indebted 
for help on many occasions. 
* Described in a paper read before Linnean Soc., London, Nov. 17 1887 
