I. '08. 



56 



II. Endopod of first maxillipede composed of 

 only two segments ; the two inner distal 

 lobes of the second maxilla rather broad 

 and not projecting beyond the basal 

 lobe ; rostrum short and dorsally ser- 

 rate, Hymenodora (p. 72). 



Genus Acanthephyra, A. Milne-Edwards. 



SysteUaspis, Spence Bate. 



The two British and Irish species of this genus may be 

 separated thus : — 

 I. Rostrum armed with five to eleven teeth 

 above and three to seven below^ ; all the 

 abdominal somites except the first 

 strongly carinate dorsally ; posterior 

 edges of fourth and fifth somites entire ; 

 telson not acutely pointed apically ; no 

 photophores present, . . .A. purpurea. 



IT. Rostrum armed with thirteen to sixteen 

 teeth above and eight to eleven below' ; 

 only the third abdominal somite dor- 

 sally carinate ; posterior edges of fourth 

 and fifth somites crenate ; telson ter- 

 minating acutely ; numerous photo- 

 phores present, ^ . . .A. dehilis (p. 59). 



Acanthephyra purpurea, A. Milne-Edwards. 



Acanthephyra purpurea, Kemp, 1906 (1) {ubi syn.), PL i 

 and PL ii, figs. 1-3. 



Acanthephyra purpurea, Coutiere, 1906, figs. 5-7 (post- 

 larval development). 



Acanthephyra purpurea, Kemp, 1907, PL xiv ; PL xv, 

 fig. 1 (larval development). 



In my account of this species in the Report for 1905 

 (1906(1)), will be found a discussion of the lengthy synonymy 

 together with a description and figures. Owdng to a printer's 

 error the gill-formula given on p. 14 thereof is incorrect, and 

 should read as follows : — 





VIL 



vrrr. 



IX. 



X. 



XT. 



XTT. 



xrrr. 



1 

 XIV. 



Podobrauchiae, ... 



ep. 



l+ep. 



ep. 



ep. 



ep. 



ep. 



(ep.) 



1 

 1 



Arthrobranchiae, 





■ 



2 



1 



1 



1 



1 



1 

 1 



Pleurobranchiae, 





... 



... 



1 



1 



• 



1 



1 



1 

 1 1 



