PORCELLANID.E. 83 



trical with these, but diminish in length as they recede 

 downwards. It will be seen therefore that when the joints 

 of the foot-jaw are thrown out, approaching to a straight 

 line, the curved hairs are made to diverge ; but as the cast 

 is made, they resume their parallelism, and sweep in, as 

 with a net, the atoms of the embraced water." Mr. Gosse, 

 in examining these hairs with the microscope, finds that 

 each individual bristle is set on each side with a row of 

 short stiff hairs, projecting nearly at right angles to its 

 length. These hairs meet those of the adjoining bristle 

 point to point, and so on in succession ; and so there is 

 formed a most perfect net of regular meshes, which must 

 enclose and capture every animalcule that floats within its 

 range, while at each outcast it opens at every mesh, and 

 allows all refuse to be washed away or fall to the ground. 



Porcellana loxgicorms, Linn. sp. — Hands long, 

 straight, and thick, their claws slender. Forehead divided 

 into three lobes, the middle one deeply grooved ; second, 

 third, and fourth pairs of legs with few hairs. 



Common under stones and in crevices of the Eschar a fo- 

 liacea. The Eev. G. Gordon, writing on the Crustacea of 

 the Moray Firth, observes that the voracious Cod does not 

 overlook these puny Crabs, but, in feeding on them, makes 



