382 THE CADDIS SHRIMP. 



body being in an upright position. It was a most 

 awkward attempt, and though there was much effort, 

 there was little effect. 



THE CADDIS SHRIMP. 



On sub-merged tufts of that seaweed that is sold in 

 a dry state under the name of Carrageen moss 

 (Chondrus crispusj, I have found in considerable 

 numbers a Crustacean resembling in many points the 

 Gaprella^ but belonging to another order of this great 

 Class. Without perhaps actually confining itself to 

 this particular species of weed, it seems to affect it 

 more than any other. Not, however,; that you would 

 find it on those ample tufts of Chondrus that grow in 

 shallow rock-pools exposed at half- tide, the fronds of 

 which glow at their tips with the most refulgent 

 reflections of steel-blue. It must be sought at ex- 

 treme low- water, about the sides of rocks that are laid 

 bare only at the spring tides of March and September, 

 and the alga itself will be masked under a crowd of 

 Laomedece, Sertularice, Anguinari(2, PedicellirKB, and 

 other parasitic zoophytes, and half covered with a 

 thick coat of dirty floccose matter, the ejecta, as I 

 suppose, of these creatures. 



Among these, and assisting to conceal and meta- 

 morphose the plant, you may find a number of conical 

 tubes varying from ~- to -|-th of an inch in length 

 made of a somewhat tough papery or leathery sub- 

 stance of a dusky colour and of a rough surface. 

 They are stuck upon the fronds of the sea-weed in all 

 directions, without any order, some laid along, others 



