86 



J. I\. KiNAHAN on the Britannic Species of 



Plate X. 



DIAGRAMMATIC SKETCH, ILLUSTRATING HOMOLOGIES OF GALATHEA. 



K9, lower view of carapace, etc. ; ), ocular somite; 2, au- 9, external niaxilliped, references as last, 



ditory antennal; 3, olfactory do.; 4, mandibvilar do., 10, first cheliped, do. do. 



frontal portion ; 6?, probably second maxillary. 11-13, second to fourth do. 



1, eye and scale. 14, fifth pair of chelipeds. 



2, auditory antenna;. 15, first pleopod, male. 



3, olfactory antennx. 16, second do. do. 



4', mandible; 6, basis; i, iscliiuni ; m, nicroa ; c, carpus ; 17-19, third and fourth do.; the corresponding numerals 



p, propodo.^. 

 5, first maxilla, ^vith enlarged view of cutting edge ; 6, 



basis; i, ischium; x, appendage. 

 G, second maxilla; ex, coxa; b, basis; i, ischium; 



X, appendage; r, respiratory plate. 



7, third maxilla; b, basis; i, ischium; j, appendage; 

 :, respiratory plate. 



8, internal raaxilliped ; ex, coxa; fc, basis; i, ischium; 

 m, meros ; c, carpus ; p, propodos ; x, appendage. 



on the right-hand side of the plate show the same limbs 

 in the female. In 17-19, c has been inserted for ni. 



20, posterior pleopod ; h, basis ; i, ischium ; x, accessory 

 plate. 



mdi., carapace upper view ; regions, f, frontal ; g, gastric ; 

 hh, hepatic; ca, cardiac. 



The figure below this shows the loth to twenty first so- 

 mites, witli attached coxa {cx^. 



