188 A HISTORY OF RECENT CRUSTACEA 
the appearance of a dried specimen. Spence Bate declares 
that ‘ Avius has been taken only on the southern coast of 
England,’ but Bell and Marion have reported it from the 
Mediterranean and Milne-Edwards from the coasts of 
France. The name of the species may be guessed to 
signify ‘with a stiff rostrum.’ The same feature belongs 
to a second species, Awius glyptocérus, von Martens, found 
in Australian waters. ‘The second antenne in this genus 
have a movable spine or scale representing the exopod on 
the second joint. 
Paraxius, Spence Bate, 1888, was founded for a species 
taken off Celebes Island, in which the second antennz 
have no ‘scaphocerite,’ that is, no scale, spine, or other 
representative of the exopod on the second joint, and no 
‘ stylocerite.’ 
Hiconaxius, Spence Bate, 1888, has three species, all 
taken from depths of some hundreds of fathoms in the 
Pacific. Here the second antennz have ‘the peduncle 
furnished with a scaphocerite and _ stylocerite.’ ‘This 
genus, the author says, ‘ differs from Paraxius in having 
both scaphocerite and stylocerite, which are absent in that 
genus; this character also separates it from Awius, which 
has a small scaphocerite only. The stylocerite, which is 
present in this genus, is wanting in Awius, as it is in all 
the Macrura, except Eiconaxius and Cheiroplatea. Its 
presence is a feature most prevalent in the Anomurous 
Crustacea.’ In the description of the type species, Hiconaxius 
ucutifrons, Spence Bate says of the second pair of antenne, 
‘its third joint is externally produced to a long sharp 
tooth or stylocerite.’ Yet in his glossary ‘stylocerite’ is 
defined as ‘style or large spine on outer margin of the 
first joint of the first pair of antennz, and in the Intro- 
duction to his Report on the Chailenger Macrura, he 
attributes a stylocerite to the first antenne in species of 
Penceeus, &c., but states that it does not exist in the 
Trichobranchiata. Under all the circumstances it seems 
as if it would be just as well to call a spine a spine instead 
of a stylocerite. The single specimen of Hiconazius parvus, 
half an inch long, taken from a depth of 520 fathoms, had 
