142 Mr. C. SpcnceBate on British Edriophthalmous Crustacea. 



2. D, bispinosa. Second segment of upper antenna not so long 



as the first. Two anterior segments only of pleon produced 

 into a spine. 

 Plymouth, C. S. B. Penzance, — Harris, Esq. Moray, i?e?;. G. 

 Gordon. Falmouth, W. Webster y Esq, Macduflf, Mr. Gregor. 



3. D. Gordoniana. First segment of posterior pleon furnished 



with a spine. 

 Moray, Rev, G, Gordon. 



4. D, fucicola (Edwards). 



Amphito'e fucicola (Edwards). Pherusa fucicola (Leach). 

 With no dorsal spine. 



Falmouth, FT. Webster, Esq, Youghal, Ireland, R. Ball, Esq. 

 {Ann. Nat. Hist. Oct. 1847). 



Genus 15. Calliope (MS. Leach). 

 Upper antenna without secondary appendage. All the feet with 

 strong semi-prehensile claws. Telson single. Mandible palpi- 

 gerous. 



1. C. Leachii (mihi). Antennse subequal. First and second 

 gnathopoda subcheliform, subequal. 

 Moray, Rev, G, Gordon. Devonshire?, Dr. Leach (Brit. Mus, 

 Coll.). 



Genus 16. Is^a (Edwards). 

 Upper antenna with secondary appendage. All the feet pre- 

 hensile. Telson reduced. 



1. /. Montagui (Edwards). Upper antenna rather longer than 

 lower. First gnathopod smaller than second. 

 Plymouth, C. S. B. 



Genus 17. Lembos (mihi). 

 Upper antenna with secondary appendage small. First gnatho- 

 pod larger than the second. First of the posterior pereiopoda 

 very short, the last very long. Telson rudimentary. 



1. L. Cambriensis (mihi). First hand without a thumb. 

 Glamorganshire, C. S. B. 



2. L. versiculatus {xnihi). First hand without a thumb. Second 



scarcely prehensile, the carpus and meros furnished with 

 a strong brush. 

 Plymouth, C. S. B. 



3. L. Websterii (mihi) . First hand with a thumb on propodos. 

 Falmouth, W. Webster, Esq. 



4. L. Damnoniensis (mihi). First hand with a thumb on carpus. 



