A STILE ACE A. 



ILYANTH1DJS. 



THE SAND PIXTLET. 



Halcampa ckrysanthellum. 



Plate VII. Figs. 9, 10. 



Specific Character. Tentacles twelve, in one row, as long as the diameter 

 of the column, banded. 



Actinia chrysanihellum. Peach, in Johnston's Brit. Zooph. Ed. 2, 



i 220 ; pi. xxxvii. figs. 10 — 15. Cocks, 

 Eep. Comw. Soc. 1851, 6 ; pL I figs. 20, 21. 



Peachia (?) chrysanihellum. Gosse, Linn. Trans, xxi. 271 ; Man. Mar. 



ZooL i. 31. 



Halcampa chrysanihellum. Ibid. Annals N. H. Ser. 3. i. 418. 



GENERAL DESCRIPTION. 

 Form. 



Column. Cylindrical, lengthened, worm-like (extending to ten times its 

 diameter or more) ; slightly invected ; terminating below in a rounded 

 extremity, which is generally distended into a bladder-like form and 

 translucent thinness, and is incapable of being retracted ; merging above 

 into the tentacles without a parapet. Surface studded with excessively 

 numerous, minute, sucking warts. 



Dish. Plane. Radii twelve, distinct. 



HALF-DISK OF H. CHBTSANTHELLUM {magnified). 



Tentacles. Twelve, strictly marginal, set in a single row, their feet in 

 contact. Nearly cylindrical, with rounded extremities, about as long as 

 the general diameter of the column, usually carried pointing upwards and 

 outwards, slightly arched ; perfectly retractile by the ordinary process of 



