REPORT ON THE AMPHIPODA. 1335 



Family Paeapheonimidj, Bovallius, 1887. 



This family is placed by Bovallius between the Cyllopodidse and Thaumatopsidse 

 [Cystisomidse]. He gives for it the following diagnosis :— 



" Head very large, tumid. Eyes very large. First pair of antennae fixed at the 

 anterior side of the head, with the first joint of flagellum tumid, ovate, the rest of 

 flagellum terminal, few-jointed. Second pair fixed at the inferior side of the head, 

 angulated. Mandibles without palp. Seventh pair of pereiopoda [Fifth Perzeopods] not 

 transformed." 



To this may be added the special characteristic that the Maxillipeds end in a single 

 broad plate, no doubt representing the usual pair of outer plates in coalescence with the 

 inner plate or tongue. 



Genus Paraphronima, Claus, 1878. 



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



1879. ,, Claus, Der Organismus der Pkrouimiden, p. 6. 



1885. ,, Bovallius, On some forgotten genera Amph. Crust., Bihang till K. Svensk. 



Vetensk. Akad. Handl., Bd. 10, No. 14, p. 9. 



1885. „ Carus, Prodromus Faunae Mediterranese, pars ii. p. 424. 



1886. ., Gerstaecker, Bronn's Klassen und Ordnungeu, 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. 13. 



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

 while placing the genus among the Phronimidse suggests that, with reference to the tube- 

 shaped liver appendages of the intestine, it might be correct to place it among the 

 Hyperidse. The following definition agrees nearly with that given by Claus. 



Eyes. — Each with two closely approximate groups of ocelli, a large and a small. 



Upper Antennae attached at the front of the head, in both sexes having a short 

 three-jointed peduncle and a flagellum with large apically pointed first joint. 



Lower Antennas attached just in front of the mouth organs, with four free joints in 

 the male, the second and third short, these with the long terminal joint in the adult bent 

 downwards ; in the female with one conical or stiliform joint and a minute second joint 

 at its apex. 



Mandibles without palp in both sexes. 



Maxillipeds ending in a single broad concave plate. 



The First Gnathopods with third joint and wrist distally widened, so as to be in an 

 imperfect fashion complexly subchelate ; the Second Gnathopods with joints unexpanded, 

 the hand produced distally into two little plates, one on either side the finger. 



