200 HISTORY OE BRITISH CRUSTACEA. 



Gen. 97. AMPHITHOE, Leach. 



Upper antennae the longest, without a bristle at the base 

 of the fourth joint. Tail above without bundles of spines. 

 Hands ovate or filiform. First and second pairs of legs 

 subcheliform. 



Mr. Bate remarks that the species of this genus " build 

 nests made of weed and material of their own secretion/' 



Amphithoe rubricata. Montagu's Coast Screw. — Body 

 slender, usually reddish, or pale pink, minutely and closely 

 speckled with darker spots of the same hue. Hands ovate, 

 without notch. 



South coast of Devon (Montagu) ; Strangford Lough 

 (Hyndrnan and Thompson) ; Springvale, Down (Thompson). 



Amphithoe ltttorina."* Johnston's Coast Screw. — Body 

 smooth, olive-green, speckled with minute black dots j back 

 of segments deeply punctured; a deep semilunar fissure 

 between wrist and hand. 



Near Berwick, amongst Conferva, in pools left by the 

 tide ; also Springvale, Down, Ireland. It lives, says Dr. 

 Johnston, in a furrow from one to two inches long, com- 



* Gammarus punctatus, Johnston, Zool. Journ. iii. pp. 197 and 490; 

 the specific name preoccupied by Say, so it has been altered by Mr. Bate. 



