Canon A.M. NoYvnan on British Amphipoda. 141 



mining my North Atlantic allied forms I find Talorckestia 

 Jonfjicornis (Say) and Talorckestia megalophthalmns (Bate) 

 from N.E. America (received under these names from S. I. 

 Smith) to be true Talorchesfice, in which the males have the 

 first g-nathopods subchelate and similar in structure to those 

 of Orchestia, and thus quite different from the two species we 

 are now considering. From Cadiz I have examples of 

 Orchestoidea Fischerii (M. -Edwards) given me by Signor 

 Bolivar under that name. In this species, as in those whicli I 

 here call Orchestoidea Deshayesii and Orchestoidea hrito, there 

 is a close correspondence in the character of the first gnatho- 

 pod male, which is not subchelate, for the end of the hand is 

 not expanded to receive the impact of the finger, but both 

 the hand and the wrist bear a tubercle on the margin. Tliese 

 tubercles may prove general throughout the genus ; but 

 whether they exist in the type Orchestoidea tuberculata, 

 Nicolet, I have no means of ascertaining. It is a question 

 whether the two genera ought to be maintained. It is not 

 necessary to go beyond Stebbing's species in the paper re- 

 ferred to, where in Talorchestia novcB-hollandioe, Stebbing, we 

 have a characteristic species of Talorchestia, in T. Deshaijesii 

 what I take to be an Orchestoidea, and in T. tridctitata, 

 Stebbing, an intermediate form, but one which, if the genera 

 are to be kept distinct, must be retained in Talorchestia. 



Fam. II. LysianassidsB. 



Genus 1. NORMANION, J. Bonnier. 



= Normania, Boeck {iiec Bowerbank). 



17. Normanion quadrimaniis (Bate &, Westwood). 



18G8. Opis qxmdrimana, Bate & Westwood, (I) vol. ii. p. 503. 

 1876. Normania quadrimana, Boeck, (138) p. 188, pi. vi. fig. 3. 

 1890. Normania quadrimaiia, Sars, (142) p. 32, pi. xiii. fig. 1. 

 1893. Normanion quadrimanus, .J. Bounier, " Les Amphipodes du 

 Boulonuais, 111.," Bull. Sci. France et lielgique, vol. xxiv. p. 167. 



Hah. Isle of Cuinbrae, 20-2-; fath. (.4 M N.) : .}fas. Nor. 

 Near Devaar Island, Firth of Clyde (T. S.). 



IHstrib. South and West Norway {G. 0. Sirs). 



Genus 2. Acidostoma, Lilljeborg. 



18. Acidostoma obesum (Bate). 



1861. Anonyx obesus, Bate & Westwood, (1) vol. i. p. 98. 



1865. Acidostoma ohesmi, Lilljeborg, " On Lysianasm mnyelknnca and 



Amphipoda lysianassi>w," Nov. Act. Soc. Sci. Upsal.'ser. 3, p. 34, 



pi. V. 

 1890. Acidostoma ohesun, Sars, (142) p. 38, pi. xiv. fig. 2. 



Hah. Shetland {A. M. N.) ■ Banff (T. Edward) : Mas. Nor. 

 Isle of Cumbrae [D. R.) ; St. Andrews (Mcintosh) ; between 



