84 



The branchial formula is identical with that of Acanthephyra, and is as 

 follows : — 



Total 1 + 6 ep. 6 5= 12 + 6 ep. 



It is doubtful, as Faxon suggests, whether Ephyrina should be separated from Acanthephyra 

 Acanthephyra curtirostris and cristata link the two genera together. 



45. Ephyrina Hoskyilii, Wood-Mason. 



Ephyrina Eoshynii, Wood-Mason, Ann. Mag. Nat. Hist., Feb. 1R91, p. 194: Canllery, "Caudan" Crnit. iu 

 Ann. de l'Univ. Lyon, 1896, p. 376. 



Illustrations of the Zoology of the Investigator, Crustacea, Plate LII. Fig. 3. 



The rostrum and carapace combined are a little over half the length of the 

 abdomen without the telson. 



The rostrum has the form of a high thin frontal crest, not reaching to the 

 end of the eyestalks, terminating anteriorly in a sinuous vertical margin, and 

 having both its margins trenchant : posteriorly it is produced a short way behind 

 the gastric region as a moderate carina. 



The outer orbital angle coincides with the post-antennular spine, which is 

 hardly so long as the post-antennal spine — the latter being a true branchiostegal 

 spine situated at the antero-lateral angle of the carapace. A sinuous ridge runs 

 from the orbital notch nearly to the posterior border of the carapace, and an 

 oblique offshoot of this ridge defines the hepatic groove posteriorly. 



None of the abdominal terga are either carinated or produced posteriorly as 

 spines, and the first 3 abdominal somites are only moderately compressed : the 

 6th somite is nearly twice as long as the 5th. The telson is shorter than the 

 exopodite of the caudal swimmeret. 



Eyes well pigmented, not wider than their stalks. The antennular peduncle 

 does not reach halfway along the antennal scale, the basal joint is the longest 

 and has a short " scale " at the base of its outer border. The antennal scale is 

 hardly two-thirds the length of the carapace proper, its outer edge is thickened 



