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HISTORY OR BRITISH CRUSTACEA. 
Gen. 105. PROTO, Leach . 
All the rings of thorax furnished with legs : there are 
seven pairs of these organs ; the second, third, and fourth 
pairs have a vesicular appendage at their base. 
Proto pedata, Leach. Muller’s Spectre Shrimp . — Up- 
per antennae very long, lower antennae very short. Fifth 
pair of legs very short; palm of second jaw-foot convex and 
slightly denticulated. 
South coast of Devon (Montagu) ; Plymouth (Mr. Spence 
Bate) ; Bell Bock (Dr. Fleming) ; Berwick Bay (Dr. John- 
ston) ; Moray Firth (Rev. G. Gordon). — Desmarest found 
this species abundantly on sponges, and fancies that it feeds 
on the substance of the animal which forms them. 
Proto Goodsirii (Spence Bate) differs chiefly from the 
preceding in the palm of second jaw-foot being concave. 
Moray Firth (Rev. G. Gordon). 
Fam. CYAMIDAE. 
Body depressed, oval. Eyes compound ; two very small 
ocelli on vertex ; antennae very close together at the base. 
Five pairs of legs, more or less prehensile; second and third 
