THE CADDIS SHRIMP. 409 



The gill-fans of this species are most lovely, forming a nearly 

 complete funnel by their regularly radiating arrangement, and 

 being coloured gorgeously with scarlet, green, brown, and gold. 



Then there is the Funnel Amphiteite (Amphitrite infundi- 

 lulum), £0 called because the tentacles are so perfect in shape, 

 that when fully spread they form a circular funnel, in which 

 scarcely the slightest break is perceptible. This funnel is 

 rendered more complete by the curious fact, that in each half of 

 the fan the tentacles are united by a delicate and transparent 

 web, reaching nearly to their tips. The prevailing colour of these 

 beautiful fans is purple, darkest towards the tips, and changing 

 gradually to chestnut at the base. 



This is not a plentiful species, and is mostly obtained by 

 means of the dredge or drag, which tears up a portion of the 

 ground and brings with it the Fimnel Amphitrite and its dwell- 

 ing. This is of a tubular shape, and generally black, with a 

 slight mixture of green. The colour, however, is very variable, 

 and depends much upon the age of the tube ; for when freshly 

 made, it is nearly as transparent as that of the previous species. 

 There are other species of Amphitrite, all of which are interest- 

 ing, but which our diminished space will not admit. 



Should the reader happen to be an entomologist, he will 

 readily call to mind the tiny cylindrical cases that are made 

 by certain lepidopteran larvaj, belonging to the great family 

 Tineidse, and which are found so plentifully upon the leaves of 

 oak, hazel, and other trees. If he should happen to be some- 

 thing of an aquarian naturalist, and fond of looking for marine 

 curiosities, he may find attached to submarine plants, certain 

 little cylindrical cases which are wonderfully like those of the 

 moths. They are very small indeed, scarcely thicker than the 

 shaft of an ordinary pin, and measuring scarcely more than the 

 eighth of an inch in length. Their colour is pale brown, their 

 surface is rough, and they are stuck upon the seaweed in great 

 confusion, without the least attempt at arrangement. 



These are the habitations of a very small crustacean {(Jerajms 

 tubularis), popularly called the Caddis Sheimp, because the tube 

 which the creature makes is analogous to that which is formed 

 by the caddis larvse. The animal which inhabits this case is a 

 curious little being, very like the long-bodied, long-legged 



