188 A HISTOEY OF RECENT CEUSTACEA 



the appearance of a dried specimen. Spence Bate declares 

 that ' Axius 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, Axius glyptocerus, von Martens, found 

 in Australian waters. The second antennse in this genua 

 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 antennae 

 have no ' scaphocerite,' that is, no scale, spine, or other 

 representative of the exopod on the second joint, and no 

 ' stylocerite.' 



Eiconaxius, Spence Bate, 1888, has three species, all 

 taken from depths of some hundreds of fathoms in the 

 Pacific. Here the second antennje 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 Aadus, which 

 has a small scaphocerite only. The stylocerite, which is 

 present in this genus, is wanting iu Axius, 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, Eiconaadus 

 acutifrons, Spence Bate says of the second pair of antennae, 

 ' 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 antennae,' and in the Intro- 

 duction to his Heport on the Challenger Macrura, he 

 attributes a stylocerite to the first antennse in species of 

 Penceus, &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 Eiconaxius parvus, 

 half an inch long, taken from a depth of 520 fathoms, had 



