REPORT ON THE AMPHIPODA. 1373 



First pair of antenna) thick, scarcely tumid (£ with multiarticulate flagellum). Second 

 pair of antenna? almost similar to the first pair, not angulated, fixed at the anterior side 

 of the head. Mandibles with palp. Seventh pair of pereiopoda not transformed [Fifth 

 Perasopods normal]. Uropoda normal." 



The genera included in the family by Bovallius x are Hyperia, lulopis, Hyperoche, 

 Tauria, Hyperiella, Parathemisto, Euthemisto, TJiemistella, and Phronimopsis. Of 

 Dana's Tauria, however, Bovallius does not appear to have seen any examples, so that 

 its validity as an independent genus remains more or less conjectural. Phronimopsis is 

 withdrawn from the family Phronimidse, in which Claus placed it, probably on account 

 of the shortness of the head and the possession of a palp by the mandibles. Cyllopus 

 and Cystisoma, which Claus alludes to as included among the Hyperidse, are transferred 

 to two separate families by Bovallius. 



Genus Phronimopsis, Claus, 1878. 



1878. Phronimopsis, Claus, Zool. Anzeiger, Jahrg. i. No. 12, p. 269. 



1879. „ Claus, Der Organismus der Phronimiden, p. 5. 



1881. „ E. von Martens, 2 Zool. Record for 1879, Crustacea, p. 33. 



1885. ,, Cams, Prodromus Faunae Mediterraneas, pars ii. p. 424. 



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



1887. „ Bovallius, Systematical List of Amph. Hyper., Bihang till K. Svensk. 



Vetensk. Akad. Handl., Bd. 11, No. 16, p. 23. 



For the original definition of the genus, see Note on Claus, 1879 (p. 488). Bovallius 

 in 1887 removed it, without giving any fresh definition, from the family Phronirnidse, in 

 which it was placed by Claus, and made it the ninth genus of the family Hyperiidse. As 

 the genus now includes three species, the definition may be modified as follows : — 



Antennse of both pairs having multiarticulate fiagella in the male, but not in the 

 female. 



Mandibles with dentate cutting edge, a secondary plate on the left mandible, a 

 molar tubercle, and, in the male, a three-jointed palp. 



The First Gnathopods simple, with hairy finger ; the Second Gnathopods chelate. 



The Perseopods slender, all narrowly subchelate. 



Uropods with long narrow peduncles and narrowly lanceolate rami. 



Telson small. 



The Head short and deep ; branchial vesicles attached to the second, third, and fourth 

 pairs of perasopods. 



There are in the heart of Phronimopsis spinifer, Claus says, three pairs of venous 

 ostia. 



1 Systematical List of the Amphipoda Hyperiidea. 



2 The index suggests the form Phronimatopsis. 



