124 AMPniPODA NOSMALIA. 



as long as the flagellum. Interior antennae rather longer than 

 the superior ; peduncle as long as the flagellum. Gnathopoda 

 slender, feeble. Fii-st pair having the propodos long, inferior 

 distill extremity produced ; dactylos rudimentary, subapical, the 

 extremity reaching scarcely beyond the apex of the propodos. 

 Second pair having the carpus as long as the propodos ; propodos 

 produced and dilated interiorly ; dactylos small, subapical. Coxae 

 of the second pair of pereiopoda excavated to receive the anterior 

 lobe of the tliiid pair. Coxse of the three posterior pairs of pereio- 

 poda not produced posteriorly to an angle. Basos of ultimate 

 pair produced, and serrated posteriorly and inferiorly ; of the 

 penultimate and antepemiltimate pairs not produced. Meros in 

 each pair of pereiopoda distally produced to a sharp angle — first two 

 paii'S anteriorly, last throe paire posteriorly. Three posterior pairs 

 of pleopoda subequal, styUform, biramous. Telson emarginate, 

 angular. Colour yellow, spotted with a pigment that increases in 

 quantity and depth of coloui- -with age, until the animal becomes 

 nearly black. 

 Length ^^ths of an inch. 



Hah. Tenby {Mr. Webster) ; Macduff {Mr. Gregor) ; Loch Fyne. 

 Shetland {Mr. Barhe) ; Belfast Bay, 20 fathoms {Mr. TJiom^son) ; 

 Plymouth (C. S. B.). 



2. Iphiinedia Eblanse. (Plate XXII. fig. 3.) 



Iphimedia Eblanse, Spe/we Bate, Nat. Hist. Review, iv. p. 229. pi. 16. 

 f. 1, 1857 ; Proc. Nat. Hist. Sac. Dublin, p. 28. pi. 16. f. 1, 1856-57. 



Cephalon short, produced into a rostrum, depressed anteriorly and 

 incm-ved. First segment of the pereion long ; second, third, fourth, 

 and fifth very short; sixth longer; seventh very long. First thi-ee 

 segments of the pleon dorsally armed with a strong vertical tooth 

 directed posteriorly. Last segment of the pereion and first 

 three of the pleon ha^'ing the posterior margin produced into a 

 latero-dorsal tooth on each side. Two anterior segments of the 

 pleon ha\'ing a lateral emargination, produced posteriorly into 

 a tooth beneath, as well as a corresponding one upon the 

 posterior margin of the third segment ; the infero-posterior 

 angle of the second and third segments produced into a tooth. 

 Eyes reniform. Antennae subequal, about one -sixth the length 

 of the animal. Fii'st pair of gnathopoda feeble, slender ; carpus 

 longer than propodos ; dactylos obsolete. Second pair of gnatho- 

 poda a little stouter than the fii'st; carpus and propodos sub- 

 equal; propodos produced and dilated distally and inferiorly, 

 hairy ; dactylos short, subapical. Pereiopoda strong, robust. 



