1538 THE VOYAGE OF H.M.S. CHALLENGEB. 



Family Tryphanid^e, Boeck, 1 8 70. 



This family was instituted by Boeck in 1870 for the single genus Tryphana. 

 Bovallius in 1887, altering the name of the genus to Tryphsena, at the same time calls 

 the family Tryphasnidae, with the following definition : ' — 



" Head large, more or less globular, tumid. Eyes large, occupying the sides of the 

 head. First pair of antennae curved, fixed at the inferior side of the head, with the first 

 joint of the flagellum tumid, the following subterminal, few-jointed. Second pair fixed 

 at the inferior side of the head, angularly folded (in the male) or wanting (in the female). 

 Mandibles with palp (in the male) or wanting palp (in the female). Seventh pair of 

 pereiopoda [Fifth Per&opods] are not transformed. Peduncles of the uropoda normal." 



Glaus in 1879 and 1887, not taking note of the genus Tryphana, which had been by 

 some writers identified with Lycsea, named the family Lycaeidae, and in 1879 gave the 

 following definition : — 



" Body less broad [than in the Typhidaa], Hyperia-XWie,, in the female more compact. 

 Pleon powerfully developed, half flexing. The laminar first joints of the third and fourth 

 peraeopods relatively small and triangular, like one another, covering only a part of the 

 ventral surface. Fifth peraeopods weak, but with the full number of joints. In the 

 female the hinder antennae are for the most part completely obsolete. Maxillae reduced. 

 Two otolith-vesicles present." In 1887 he adds the character : — •" Branchial vesicles with 

 lateral accessory compartments." 



Genus Tryphana, Boeck, 1870. 



1870. Tryphana, Boeck, Crust. Ainph. bor. et arct., p. 9. 

 1872. „ Boeck, De Skand. og Arkt. Arnph., p. 91. 



1882. Lycasa, Sars, Oversigt af Norges Crustaceer, pp. 20, 76. 



1886. Tryphana, Gerstaecker, Bronn's Klassen und Ordnungen, Bd. v. Abth. ii. p. 489. 



1887. Tryplixna, Bovallius, Systematical List of Am ph. Hyper., Bihang till K. Svensk. Vetensk.- 



Akad. Handl., Bd. 11, No. 16, p. 30. 

 1887. „ Bovallius, Arctic and Antarctic Hyperids, Vega-Exped., Bd. iv. p. 572. 



For the original definition of the genus, see Note on Boeck, 1870 (p. 397). 



From Boeck's description of the lower antennae, which in the character of the family 

 he says are ' : parvulae," and for which he only mentions three joints in describing 

 Tryphana malmii,imd from his statement that the mandibles are without palp, it may 

 be presumed that he was acquainted only with a male specimen not fully adult, since 

 according to the family character formulated by Bovallius the lower antennae are 

 wanting in the female, while on the other hand the mandibular palp is present in the 

 adult male. Bovallius, in his Arctic and Antarctic Hyperids, observes : — " The genus 



1 Arctic and Antarctic Hyperids, p. 572. 



