368 Canon A. M. Norman on tlie 



Megaluropus agilis, Norman. Guernsey, in tow-net. 

 Microdeuto_pus danmoniensis, Bate. Guernsey and Jersey (TF.). 



gnjTlotalixi, Costa. (PL XVI. fig. 3 ; PI. XVII. figs. 6, 7.) 



1893. Microdetdopus griiUotalpa,^ Delia Valle, Faun, und Flor. des 

 Golfes von Neapel, Ganimarini, p. 44, pi. i. fig. 12, pi. xi. figs. 25-43. 



1894. Microdeutopus (jryllotalpa, G. 0. Sars, Crust. Norway, Amphi- 

 poda, p. 543, pi. cxcii. fig. 2. 



1906, Microderdoims gryllotalpa, Stabbing, Das TieiTcich, Amphipoda, 

 I. Gammaridea, p. 590. 



Found at Jersey by M. Chevreux and Mr. Sinel. 



I have given figures of the one-jointed accessory flagellum of the 

 antennules (PI. XVII. fig. 0), which is shorter than the first joint of 

 the flagellum, and of the first gnathopod of the male, for comparison 

 -with the same parts in the following species. This gnathopod has 

 2-4 toothed processes on the hinder margin of the carpus, which 

 increase in size distally. Delia Valle gives only two such processes. 

 I figure (PI. XVII. fig. 7) a gnathopod with three such processes 

 from Plymouth (as figured by Sars and by Bruzelius, Autonoe 

 grandimatia), and (PI. XVI. fig. 3) another carpus from Valencia, 

 Spain, with four processes (as figured by Costa). 



statw7iis, DeUa Valle. (PI. XVI. fig. 4; PI. XVII. figs. 8-11.) 



1888. Microdeutopus grylhtalfa, Nebeski, Beit, zur kennt. der Amphip. 

 der Adria, p. 45, pi. iv. fig. 41. 



1893. Microdeutopus stationis, Delia Valle, Faun. u. Flor. des Golfes 

 von Neapel, Gammarini, p. 415, pi. v. fig. 9, pi. x. figs. 31-41. 



1906. Microdeutopus stationis, Stebbiug, Das Tierreich, Arnphipoda, 

 I. Gammaridea, p. 590. 



Sowinsky has referred a Microdeutopus found in the Black Sea to 

 this species ; but I cannot reconcile the fig. 6 in his paper of 1891 

 ■with the first gnathopod (male) of this species. Nebeski gives an 

 interesting series of figures illustrative of the gradual change in 

 form of the gnathopod from the young to the adult. 



I last year dredged many specimens of this addition to our fauna 

 off St. Peter's Port, Guernsey. 



I have figured some of the most salient features which distinguish 

 this species from M. gryllotalpa. The secondary appendage of the 

 antennules is 3-4-jointed and is equal in length to the first three 

 joints of the flagellum (PI. XVII. fig. 8). The first gnathopod in the 

 male has not quite so massive a carpus as in that species (PI. XVII. 

 figs. 9 & 10). The carpus is armed with three teeth at the extre- 

 mity (not passing down the hind margin) ; these teeth are not in 

 the same straight line, the innermost and bluntest tooth bends away 

 from the large central tooth, so that it would appear that the finger 

 closes down between them. PI. XVII. fig. 11 represents the distal 

 portion of the first gnathopod of the female, and PI. XVI. fig. 4 the 

 second gnathopod of the male. 



BtimiJSOiieUa chelifera, Bate. Guernsey (iV.) ; Jersey (S. cj- ff.). 



