or P. simplex (Bate)? 157 



after several years in spirit as when freshly caught, while in 

 Bate's species they were (like P. llolholli) " not appreciable." 

 The relative proportions of the flagellum and secondary ap- 

 pendage in the upper and the general character of the lower 

 antennse are totally different. I agree with Mr. Caiman that 

 Bate's specimen was an immature male; but he has then to 

 account for the fact that while it measured ^"^ inch, or about 

 4 millim., in length, an adult male of P. j^ectinatus is only 

 3 millim. long, a difference which is more than confirmed by 

 comparison with the type specimen at the British Museum. 

 Unfortunately this specimen is in such bad condition that a 

 detailed examination is impossible without dissection. 



Pho.rus simjjlex, Bate (Cat. of Am- Phoxocephalus pectinatus, Walker, 

 phipodous Crustacea, 1862). female. 



Generic Character. 



Eyes not apj^reciable. Eyes in both sexes large and 



dark, retaining their colour in spirit 

 for years. 



Specific Characters, 



Superior antennae having the Superior antennas having the ex- 

 extremity oiihQ flagellum not reach- tremity of the peduncle reaching to 

 t«^ beyond the anterior margin of the anterior margin of the cephalon; 

 thecephalon; the tiagellum short, flagellum /ow/--jointed; secondary 

 iAree-jointed; secondary appendage appendage much shorter than the 

 longer than the primary, four- primary, four-jointed, 

 jointed*. 



Inferior antennse as long again as Inferior antennae half as long 



the superior ; the joints of the pe- again as the superior; the peduncle 



duucle scarcely distinguishable from quite distinct from the Hagellum. 

 those of the flagellum. 



Length of immature male 4 mm. Length of adult male 3 mm. 



Alfred O. Walker. 



Nant y Glyn, Colwyn Bay, 

 July 1, 1896. 



• In the Brit. Sess.-eyed Crust, the secondary appendage is said to be 

 three-jointed, while the "primary " (flagellum) is four-jointed, the former 

 being " nearly as important " as the latter. The figure, however, showd 

 the secondary appendage much shorter ; but as in his earlier desciiptioa 

 Bate seems to have mistaken the appendage for the flagellum, the descrip- 

 tion ia probably more accurate than the tigure. 



