48 • PROCEEDINGS OF THE 



it recovers its equanimity, settles quiet, and projects erect. In 

 bending from side to side, not unfrequently one comes against its 

 neighbour, setting it in motion, and this striking a third, several 

 may be observed at one time curving their heads about, and 

 giving each other an occasional buffet. This stem is never twisted 

 spirally, nor is its motion spasmodic, like a Vorticella, the longi- 

 tudinal and transverse fibres of which it is composed being only 

 able to bring the head to the same plane as the base of the stem, 

 leaving an arch between the two. The tentacles were usually 

 seen curved and rolled up, but not retracted. The passage 

 of food revolving in the stomach to the intestine was also 

 visible. Sometimes the entire Polypide, drops off the stem, 

 which remains as a stump, and still preserves its capability 

 of motion; after a time a new one is said to bud forth from this 

 extremity. 



Four of the Zoophytes most frequently found, and occurring in 

 considerable profusion and good condition, are Tuhidaria indmsa 

 (Linn.), in the mud, and Ohelia lonyissima (Pallas), Halecium 

 halecimtm (Linn.), and Euclendrium rameum (Pallas), attached to 

 stones in the mud as w^ell as on the hard ground ; upon a small 

 branch of Obelia I detected a single CamjMnularia, which appears 

 to agree with the description and plate of C. raridentata (Alder). 



Two or three branches of these Zoophytes, and chiefly of 

 Eudendrium rameum, are frequently matted together by the silken 

 sheaths of Nereis Dumerilii (And. and M. Edw.) AVhen one of 

 these annelids is placed in a saucer of sea water, it speedily 

 protects itself at the margin of the water with a transparent 

 sheath, which it evacuates upon pressure, and soon forms another. 

 When they attach themselves to the Eudendrium, the tube or 

 sheath is strengthened by two or three stems being brought to- 

 gether, and made fast to it ; the transparency is soon lost from mud 

 and dirt. In these long black nests or tubes the Nereis dwells. 

 From an empty one a Phyllodoce Ulineata (Johnston) crawled out; 

 it had probably taken up a temporary abode, as I am not aware 

 that this genus ever formi a tube. 



II. — Sessile-eyed Crustaceans. 



In the branches of these Zoophytes we also find numbers of 

 tube-like nests, inhabited by the domicolous Amphipods. In these 

 the occupants may be observed on the look-out, leaning half over 

 the side, and waving their antennae to and fro, as they watch for 



