CRUSTACEA, 
BY 
ARTHUR ADAMS, F.L.S., & ADAM WHITE, F.L.S. 
I. INACHIDtE. 
In the family Inachidce we have been fortunate enough to discover a new species of 
Inachus, and a remarkable form of Oncinopus, both from the Eastern Seas ; species of 
Doclea, Camposcici, and Egeria were collected, those genera appearing to be principally 
exotic, while but few species of Inaclms , Lepiopodia, or Stenorgnchus were noticed among 
the islands of the Eastern Archipelago, they being chiefly confined, in their geographic 
distribution, to other zoological regions. All the members of this small, though singular, 
group are passive in defence, having a tendency either to conceal themselves in sponges and 
among the tangles of Keratophytes and Algae, or, as is the case with Camposcia, to cover 
themselves with foreign bodies, so as to be almost undistinguishable from the marine objects 
that surround them. They are feeble in their articulations, and extremely inert and slow- 
moving when disturbed in their lurking places. 
1. ONCINOPUS, De Haan. 
1. ONCINOPUS NEPTUNUS, Adam Sf White. Tab. II. Pig. 1. 
Pronte profunde incisa; lobis frontis angularibus ; secundo et tertio paribus pedum admodum 
gracilibus ; vix ter et dimidio longioribus thorace ; quarto et quiuto paribus thoraee vix ter longioribus. 
Thorace longitudine septem linearum, latitudine quinque ; trigouali, postice lato, ad frontem paullatim 
angustiore, tomentoso, compluribus, brevibus, acutis, aculeatis proccssibus p rawer Li m ad partem posteriorem 
circumdato; regionibus mediis et brancliialibus depressione baud admodum profunda separatis ; posteriore 
parte suleo transverso inter thoracem et post-abdomen : corpore excavato inter quintum par pedum ; 
B 
