180 HISTORY OE BRITISH CRUSTACEA. 



Gen. 79. LEMBOS, Spence Bate. 



Upper antenna with secondary appendage small; first 

 jaw-foot larger than the second ; third leg very short ; fifth 

 very long. Telson rudimentary. 



Lembos Cambriensis, Spence Bate. — First hand with- 

 out a thumb. 



Glamorganshire (Mr. Spence Bate). 



Lembos versiculatus, Spence Bate. — First hand with- 

 out a thumb ; second scarcely prehensile, the fourth and 

 fifth joints furnished with a strong brush. # 



Plymouth (Mr. Spence Bate). 



Mr. Bate has described two other species from the South 

 of England — L. Wehsterii and L. Banmoniensis — both fur- 

 nished with a thumb on the first hand. 



Gen. 80. LONCHOMERUS, Spence Bate. 



Like Lembos. Fourth joint of first jaw-foot produced 

 into a long spine ; hence the name, from Aoy^o? and /Aepos. 



Lonchomerus gracilis, Spence Bate. — Spine of fourth 

 joint of first jaw-foot as long as the fifth joint ; the fifth 

 joint longer than the sixth j the terminal claw ornate. 



