202 
HISTORY OF BRITISH CRUSTACEA. 
Synamphithoe hamulus, Spence Bate.— Antennae sub- 
equal ; posterior true legs scarcely prehensile. 
Moray Birth (Rev. G. Gordon); Penzance (Mr. Harris). 
Synamphithoe conformata, Spence Bate.— Upper an- 
tennae longer than the lower ; posterior true legs subpre- 
hensile. 
Plymouth (Mr. Spence Bate). 
Pam. CHELURIDjE , Allman. 
Body scarcely compressed. Abdomen abnormal ; two or 
three segments united and irregular ; six caudal styles, dis- 
similar; antennae short, leg-like. 
There is but one genus of this family, the species of 
* which burrows into wood, and, along with the Limnoria , 
helps to destroy woodwork w r ashed by the sea. 
Gen. 99. CHELURA, Philippi. 
The fourth, fifth, and sixth segments united into a styli- 
form joint. Upper antennae shorter than the lower, fur- 
nished with a secondary appendage. Lower antennae with 
segments of filament fused. 
Chelura terebrans, Philippi. (Plate XI. fig. 2.) — Jaw- 
