I. '08. 



70 



the propodus. The chelae of the second pau^ are longer than 

 those of the first. In the third pair of legs the merus is rather 

 more than one-third as broad as long ; it is furnished ventrally 

 with numerous short spinules interspersed with fine setae and 

 there is also a single spine at the outer basal angle of the 

 triangular ischium. The propodus is more than one and a 

 half times the length of the carpus, the latter being about 

 twice the length of the dactylus. The fourth pair is very simi- 

 lar to the third, but is provided with a few stout spines on the 

 outer basal edge of the ischium ; the slender dactylus is about 

 as long as the propodus. In the fifth pair the merus is more 

 than one-third as broad as long, the ischium bears three or four 

 stout spines in the middle of its ventral border, and the pro- 

 podus is twice the length of the carpus. The dactylus is about 

 one-third the length of the carpus ; it is somewhat truncate 

 apically, and is furnished with numerous stiff bristles. 



The branchial formula is : — 





VII. 



vnx 



IX. 



X. 



XI. 



xn. 



xm. 



XIV. 



Podobranchiae, 



ep. 



l + ep. 



ep. 



ep. 



ep. 



ep. 



(ep.) 





Arthrobranchiae, 







2 



1 



1 



1 



1 





Pleurobranchiae, 









1 



1 



1 



1 



1 



The rudimentary epipod at the base of the penultimate leg 

 is very inconspicuous ; it consists of a small plate scarcely one- 

 third the length of the horizontal portion of the epipod on the 

 third pereiopod. 



The single specimen examined is a female ; in the first pair 

 of pleopods the endopod is narrow, about one-third the length 

 of the exopod, and bears setae along both its margins. The 

 appendix interna, which is present on the last four pairs, is 

 almost one-third the length of the endopod to which it is at- 

 tached. 



The outer uropods, which are longer than the inner, are 

 about four and a half times as long as vdde. 



As will be seen from the figure, this species is very well pro- 

 vided with setae, but their absence on the antenna! scale and 

 uropods shows that the full number has not been retained in 

 the case of this trawled specimen. Although carefully ex- 

 amined immediately after capture no trace of photophores 

 could be detected. 



Size. — The Irish specimen measures 97 mm. ; the specimen 

 taken in the Bay of Biscay was 110 mm. in length (Caullery). 



Colour in life. — Dark crimson red verging to dark purple on 

 the anterior portions of the carapace. 



After five months in a mixture of alcohol and formalin most 

 of the red pigment has disappeared; the pereiopods, however, 

 are very clearly edged with dull purple. In life this colour 

 was obscured by the prevailing red pigmentation. 



