468 COROPHIIDjE. 



we hesitate to give the species as identical with S. typicus. 

 The antennae are represented in Mr. Gosse's figure as 

 being of nearly equal length, and but little more than 

 half the length of the animal. 



Our specimen was sent to us from Weymouth by 

 Professor Williamson. Mr. Gosse took his in tubes 

 attached to tufts of Chondrus crispus (the sea-weed that 

 is sold in a dry state under the name of Carrageen Moss), 

 at Ilfracombe, at low-water spring-tide mark ; he has 

 given, under the name of the Caddis Shrimp, the follow- 

 ing account of its habits, in the work above quoted : 



" Among these (Algae and various parasite Zoophytes), 

 and assisting to conceal and metamorphose the plant, you 

 may find a number of conical tubes, varying from one- 

 sixteenth to one-eighth of an inch in length, made of a 

 somewhat tough papery or leathery substance, of a dusky 

 colour, and of a rough surface. They are stuck upon 

 the fronds of the seaweed in all directions, without any 

 order, some laid along, others standing erect, sometimes 

 singly, sometimes associated." " The animal in its tube 

 much resembles the larvae of the genus Phryganea, that 

 anglers value under the name of Caddis-worms. There, 

 however (and as in S. typicus), the case is composed of a 

 mosaic of minute pebbles, bits of shells, &c, imbedded in 

 a glutinous silk, with which the interior is smoothly lined. 

 In our little crustacean, I do not know of what it is 

 made, or how, but it seems to be homogeneous, and is 

 certainly of home manufacture, and not the tube of a 

 Zoophyte surreptitiously obtained, as has been supposed 

 to be the case with the Cerapus tubularis of North 

 America." 



It received its specific name from Mr. Gosse in compli- 

 ment of his friend Mr. A. White. 



