DOUBTFUL SPECIES. 19 



DOUBTFUL SPECIES. 



THE Gammarus nolens, Johnston (Zool. Journ. iii. p. 

 179) has been referred to the present family, as a species 

 of the genus Typhis of Risso, without sufficient founda- 

 tion,* and probably in consequence of its supposed rela- 

 tionship to Montagua monoculoides, which was mistaken by 

 White and Gosse for a Typhis. Vide page 54. It is de- 

 scribed as about three or four lines long, and not much 

 compressed. The antennae are not more than one- third the 

 length of the body, the superior pair being the shortest ; 

 the first and second pairs of legs monodactyle ; the first 

 with a small hand, the second with the hand more dilated ; 

 the legs monodactyle and spinous ; the two pairs of 

 caudal processes having mucronate branches, and the 

 middle tail-piece is simple, terminating in a papilla, 

 without any terminal processes. 



It is described as not being rare near Berwick-upon- 

 Tweed, and as inhabiting confervas, but we have not 

 seen a specimen. 



* Typhis nolens. WHITE, Cat. Crust. Brit. Mus. p. 78. SPENCE BATE, 

 Ann. Nat. Hist. 2 ser. xix. p. 150. Rep. Brit. Assoc. 

 1860, p. 225. 



Anmyx (?) nolens. WHITE, Pop. Hist. Brit. Crust, p. 169. 



c 2 



