134 Rev. A. M. Norman's Notes on British Ampkipoda. 



must be referred to the following species if that form is to 

 retain specific rank. 



In both ohtusata and gladiosa the armature of the fourth 

 segments is alike and much more constant than that of the 

 other segments. This segment is furnished with three dorsal 

 teeth, the laterals considerably exceeding the central in size: 

 the fifth segment varies greatly in armature ; sometimes there 

 are two teeth, one behind the other on each side, the poste- 

 rior being the larger; sometimes one tooth and an articulated 

 spine ; sometimes no tooth and only the spine ; rarely smooth, 

 without either tooth or spine. The armature of the second and 

 third segments also varies greatly, sometimes the second has 

 three teeth, the third one, a rare condition ; sometimes one on 

 the second and one on the third, when it is typical ohtusata ; 

 sometimes one on the second, but none on the third; sometimes 

 these two segments are unarmed, when it is the ty^'iCdX proxima 

 ^ ?ir\(}i Alderi $ . I have never met with a specimen in which 

 the second segment has been unarmed, and the third armed, 

 though probably such a variety will sometimes occur. 



The hinder corner of the epimera of the third segment is 

 much produced, acute, and upturned, and either quite smooth 

 on the margins or with very few serrations. 



Hoh. Shetland ; the Minch ; Firth of Clyde ; North- 

 umberland ; Roundstone, Ireland : Mus. Norm. Liverpool 

 Bay {G. II. Foivler). 



Distribution. South and West Norway (Boeck) ; Sweden 

 {Bruzelius) ; Denmark [Meinert) ; Holland {Hoek) ; Northern 

 France {Ouerne) ; Western France {Chevreaux &c.). 



3. Melita gladiosa, Bate. 



1862. Melita gladiosa, Bate, Cat. Amphip. Brit. Mus. p. 185, pi. xxxiii. 



fin- 6, c? (example fig-ured abnormal). 

 1862. Melita ohtusata, Bate, /. c. p. 183, pi. xxxiii. fig. 3 (partim), S • 

 1862. Melita yladiosa, Bate & Westw. Brit. Sessile-eyed Crust. 



p. 346, c?. 

 1862. Melita ohtusata, iid. ibid. p. 341 (description, not figure). 

 1876. Melita gladiosa, Stebbing, Ann. & Mag. Nat. Hist. ser. 4, vol. xvii. 



p. 77, pi. iv. tig. 2, $ . 



For notes on synonymy see the last species. 



M. gladiosa is usually characterized by three largely deve- 

 loped teeth on the first four segments of the pleon, but some- 

 times the first is without teeth *. These teeth are of large 

 size except that the central tooth of the fourth segment is 



* The figure of M. ohtusata given in Cat. Anipliip. Brit. Mus. iippears 

 to have been taken I'rcm such a specimen of M. yludivsa. 



