350 AMPIIirODA ABERRANTIA. 



fourth pair scarcely larger than the first, having the anterior margin 

 excavate, and armed with two spines that correspond with the 

 closed extremity of the dactylos ; fifth pair like the fourth. First 

 two pairs of pleopoda rudimentary. 

 Length ^^^^ths of an inch. 



Hah. Devonshire {MontmjH, C. S. B.) ; Moray Frith {Rev. G. 

 Gordon, Mr. Gregor) ; Denmark (Edwards) ; iShetland (Eev. A. M. 

 Norman), 



2. Proto Goodsirii (Plate LV. fig. 2.) B.M. 



Proto Goodsirii, Spettce Bate, Synopsis, ^-c, Ann. Nat. Hist. Feb. 1857. 

 IVJiite, Hist. Brit. Crust, p. 218. 



Superior antenna) one-third the length of the animal. Inferior an- 

 tenna) one-half the length of the superior. First pau- of gnathopoda 

 having the propodos broad at the base and tapering ; palm very 

 oblique, minutely dentate, defined near the base by an obtuse tooth. 

 Second pair of gnathopoda having the propodos large, rounded 

 above, palm hollowed, and filled with a semimembranous tissue ; 

 margins concave, armed anteriorly and posteriorly ^vith two small 

 teeth ; dactylos much curved, impinging against the palm by the 

 extremity only. First pair of pereiopoda longer than the second, 

 and second longer than the third, short; fourth and fifth pairs 

 subequally long. 



Length ijths of an inch. 



Hab. Moray Frith (Rev. G. Gordon) ; Shetland (Rev. A. 31. Nor- 

 man). 



3. Proto elongata. (Plate LV. fig. 3.) 

 Proto elongatus, Dana, U. S. Explor. Exped. p. 809. pi. 54. f. 1. 



" Body slender, without spines or tubercles. Ccphalon rounded in 

 front, about twice as long as the next segment. Second, third, 

 fourth, fifth and sixth segments of the pereion subequal, oblong. 

 Superior antennae longer than half the body ; flagellum hardly as 

 long as the peduncle, ha\-ing eight to ten articidi ; articuH oblong ; 

 setiB few, shorter than the articuli. Inferior antennae about as long 

 as the fourth joint of the peduncle. Propodos of the first pair of 

 gnathopoda triangular, lower angle near the base prolonged into 

 an acute tooth : propodos of the second pair elongate ; palm nearly 

 straight, having an acute tooth near the base, and, in males, a tooth 

 towards the apex. Branchiae long, and nearly linear. Thii'd and 

 fourth pairs of feet longer than the fifth pair. 



" Length two-thirds of an inch. 



" Hah. Rio Janeiro, in ten to twelve fathoms water ; taken, from 

 the anchor, along with various CapreUids, January 1839." — Dana. 



