coRoriiiiD.K. 233 



Subdivision DOMICOLA. 



Pcroion not oompressed. Havinjiif cither tlic lower antenna^ sul)- 

 pcditbrm and fiu-nislied Antli strong sliglitly-ciirved spines, or tlio 

 posterior pair of pleopoda fiimished with hook-like spines. Tliey 

 construct abodes in which to take shelter either by building or bur- 

 ri)\\ing. They have the power of swimming, and, witli l)ut few ex- 

 ceptions, can walk erect. This subdi\'ision represents Milne-Edwards's 

 tribe of Marcheubs. 



Fam. 3. COROPHIID^. 



None of the segments of tlie pereion or pleon are obsolete or fused 

 together. This faniUy is synonymous with that of Dana. It consists 

 of two sections, NidIfica and Tubifica. 



Section Nidifica. 



The animals which belong to this section of the family have the 

 power of secreting either a substance that, like a web, binds together 

 the materials of which the nest is composed,, or one of a more mem- 

 branous character. 



Subfamily 1. PODOCERIDES. 



Peduncle of the upper antenfia) much shorter than the peduncle of 

 the lower. Lower antennje robust, and used in climbing. Posterior 

 pail' of pleopoda furnished with hook-like spines. 



1. AMPHITHOE. 



Amphithoe, Leach, Edhih. Encijc. vii. p. 402 ; Linn. Trans, xi. p. 3G1. 

 Dana, U, S. Exj)lur. Uxped. p. 935. 



Cox£c large, those pertaining to the third pair of pereiopoda having the 

 anterior lobe not shorter than the preceding, posterior lobe very 

 small. Second pair of gnathopoda larger than the first. Posterior 

 pair of pleopoda supporting two rami, the outer ramus terminating 

 in one or more short, sUghtly-curved spines, the inner subfohaceous. 

 Tclson single, lamelliform. 



1. Amphithoe rubricata. (Plaie XLl. tig. 1.) iJ.M. 



Cancer (Gammarus) rubricatus, ^lontayu, Linn. Trans, ix. p. 09. 

 Gammarus rubricatus, Leach, Edinb. Encyc. vii. p. 402. 

 Auiphitliuo rubricata, Ijeach, Edinb. Enci/c, Append, p. 432. 



Edwards, Hist, des Crust, iii. p. 33. 



Spence Bate, Report Brit. Assoc. 1855, p. 59. 



White, Hist. Brit. Crust, p. 200. 



Gvssv, Marine Zool. i. p. 141. f. 258. 



Eyes suborbicular, white, with black spots. Superior antenna) nearly 



