202 HISTORY OP BRITISH CRUSTACEA. 



Synamphithoe hamulus, Spence Bate. — Antenna? sub- 

 equal j posterior true legs scarcely prehensile. 



Moray Firth (Rev. G. Gordon) ; Penzance (Mr. Harris). 



Synamphithoe conformata, Spence Bate. — Upper an- 

 tennas longer than the lower ; posterior true legs subpre- 

 hensile. 



Plymouth (Mr. Spence Bate). 



Fam. CHELURIB^, 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 washed by the sea. 



Gen. 99. CHELURA, PMlippi. 



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 antennas with 

 segments of filament fused. 



Chelura terebrans, Philippi. (Plate XL fig. 2.) — Jaw- 



