Haddon — Note on Halcampa chrysanthellum, Peach. 7 



lower portion of the body is described as being glandular, in the 

 habit of forming a sheath for itself, having a revolving motion, 

 and becoming swollen and transparent; he also noticed that its 

 posterior end could adhere a little. 



Landsborough, Milne Edwards, Hincks, Dana, Fischer, Andres, 

 and Pennington, merely repeat previous descriptions more or less 

 fully, but add nothing new thereto, so it is unnecessary to refer at 

 length to them. 



Previous observers have accurately described the general ap- 

 pearance and habits of this interesting little anemone. I need 

 add only a few supplementary notes. 1 



In my former Paper I have figured what may be regarded as 

 the general form of the animal when about half extended ; but, as 

 all observers have noted, the shape may be very varied. The 

 physa is usually in a state of more or less distension ; occasionally 

 it assumes a very thin, rod-like appearance. (The physa is in this 

 state when boring into the sand : compare the similar appearance 

 of Peachia hastata, Grosse — Haddon and Dixon — Proceedings of the 

 Royal Dublin Society (n. s.), vol. iv., pi. xviii., fig. 7.) I have been 

 unable to see a terminal posterior orifice, but there is a small per- 

 foration in each intermesenterial chamber close to its posterior ter- 



1 My friend Mr. G. Y. Dixon has kindly allowed me to copy the following from his 

 aquarium notes : — 



" November 5, 1885. — Only one Halcampa survives [from Septemher 26]. It, how- 

 ever, is in splendid health, and has grown considerably, being, when fully expanded, 

 2 inches long ; scapus, J of an inch in diameter ; capitulum, •§■ inch. When fully dis- 

 tended it is quite transparent, and its oesophagus can be distinguished quite plainly 

 running the whole length of the capitulum as a narrow, straight, pale-orange tube, 

 which terminates just at the constriction which usually marks the limit between the 

 scapus and capitulum. The twelve mesenteries are very conspicuous in the scapus, 

 their inner free edges being orange, and^shining through the pellucid body wall. With 

 an inch objective you can distinctly see round glands (?) imbedded in the convoluted and 

 swollen edges. The mesenteries are arched above where they run in to join the oeso- 

 phagus, and are gradually sloped away as they come down towards the constriction 

 wbich usually marks off the physa from the scapus. The clearness and transparency of 

 the whole animal, but above all of the scapus, almost surpasses belief. I cannot find 

 any marks on the physa like those in Peachia hastataP [This, of course, refers to rows 

 of pores alluded to in our joint Paper. — A. C. H.] 



" Four pairs of mesenteries are longer than the rest, and are more convoluted on 

 their edges and more orange in colour; between each of these pairs is a mesentery 

 which does not run down so near the physa ; its edge is not so swollen or convoluted, 

 and is more of a straw-colour than orange. Is it possible that this points to an affinity 



