156 Miscellaneous. 



that part of the auimal which secretes the parchment-like mucus, 

 although this part is not entirely attached, as in Sagartia parasitica. 



The deformation undergone by the animal is due to the consider- 

 able expansion of this foot, carrying with it the lower part of the 

 column. This expansion becomes so great in the completely deve- 

 loped animal that the foot and the wall of the column become to a 

 great extent parallel. From this results the remarkable fact that 

 true gastric canals are formed by the elongation of the folds in a 

 horizontal direction. 



The ovules before deposition are furnished with a germinal vesicle, 

 which we do not find after their escape. Fecundation is therefore 

 internal. Segmentation, which is very easUy observed, takes place 

 regularly up to sixteen cells. The Moridce are all of very irregular 

 form. They become transformed into Gastndce. 



I have traced the farther development to a larval form with 

 eight tentacles, the form in which fixation takes place. I have 

 also observed very small fixed Adamsice of hexameral type and not 

 yet deformed. Others, a little older, showed various degrees of 

 deformation. They show that the Actinia after attaining a certain 

 size upon the inner margin of the aperture of a gasteropod shell, 

 spreads out to the right and left, following exactly the outer margin 

 of the shell, but without concealing it at all. We see therefore that 

 the commencement of the deformation has as its result the sheltering 

 of the hermit-crab. It is on\y later on and secondarily that the 

 shell of the gasteropod is covered by the Adamsia. — Gomptes 

 Rendus, July 13, 1885, p. 173. 



Note on '■'■Deep-sea and ShaUow-ivater Hydrozoa" 

 By J. J. QuELCH, B.Sc. (Lend.). 



In the last Number of the ' Annals and Magazine of jS"atural 

 History,' in a paper " On some Deep-sea and Shallow-water 

 Hydrozoa," a new species of Plumidaria was described by me under 

 the name of Plumidaria delicatula. It was quite overlooked by me 

 at the time that this name had already been applied by Mr. Bale to 

 an Australian Plumidaria (Journ. Micr. Soc. Victoria, vol. ii.). For 

 the Cape- Verde species, which is thus destitute of a name, I substi- 

 tute the term " anmdigera" suggested by the more or less ringed 

 extremities of the internodes ; so that the species should be known 

 as Plumidaria annidigera. 



