140 Mr. C. Spence Bate on British Edriophthalmous Crustacea' 



Genus 8. Kroyera (mihi). 

 Westwoodia (mihi), Brit. Assoc. Rep. 



Head like Westwoodia. Hands of gnathopoda well developed, 

 and formed by the carpus being produced so as to meet the 

 apex of the dactylos. 



1. K. carinata. The last two segments of the pereion and 

 those of the anterior pleon strongly carinated. 

 Banff, Mr. Edwards. 



Genus 9. Phoxus (Kroyer). 



Cephalic segment produced into a rostrum. Upper antenna 

 with two terminal filaments. Mandible palpigerous. Gnatho- 

 poda subcheliform. Last pair of legs very small. 



1. P. Kroyerii (mihi). Upper antenna reaching scarcely beyond 



the extremity of the rostrum ; lower antenna much longer. 

 Plymouth, C. S. B. 



2. P. Holholli (mihi). The peduncle of the upper antenna reach- 



ing quite to the extremity of the rostrum ; the lower scarcely 

 longer than the upper. 

 Plymouth, C. S. B. 



3. P. plumosus (RoihoW). Upper antenna reaching beyond the 



lower. The penultimate segment of the peduncle of the 

 lower produced inferiorly into a scale-like process. Hair 

 upon the animal plumose. 

 Plymouth, C. S. B. 



Genus 10. Sulcator (mihi), Ann. Nat. Hist. 1852. 

 Bellia (mihi), Ann. Nat. Hist. 1851 ; Dana. 



Upper antenna with two filaments. Gnathopoda scarcely pre- 

 hensile. Telson double. 



1. S. arenarius {mihi). Anterior coxse largely developed. Upper 



antenna not longer than the lower. Basis of three posterior 

 pereiopoda developed in the form of scales. Dactylos of the 

 same obsolete. 

 Falmouth, Dr. Leach, MS. {Brit. Mus. Coll.). Glamorganshire, 

 C. S. B. Moray Frith, Rev. G. Gordon. 



2. S. marinus (mihi). Basis of three posterior pereiopoda not 



developed in the form of scales. 

 Banff, Mr. Edwards. Macduff, Mr. Gregor. 



Subfamily V. GAMMARIDES. 

 The upper antenna not in advance of the lower, and never 



