Verrill, Notes on JRadiata. 473 



present genus, when mature. In young specimens, however, the 

 marginal tubercles are only 2 or 3-lobed, Avhile those of the sides are 

 simple rounded tubercles, and scarcely crowded. 



There are no openings apparant in the sides of the body.* In this 

 respect the genus difters from the typical species of Anthopleura {A. 

 Krebsii), as well as in the character of the lateral tubercles. A. gran- 

 ulifera D. and M. appears to belong to this genus, however, since it 

 is said to be imperforate and tuberculated. 



Cystlactis Edw. and Haime, op. cit, p. 2*76. 



" Body entirely covered by subtentaculiform tubercles, or having 

 the aspect of large, very salient pustules." 



Cystlactis Eydo-UXi Edw. and Haime, op. cit., p. 276, 1857. 



" Tentacles short, moderately numerous, longitudinally striated by 

 contraction ; the external ones smaller than the intei-nal. Body cov- 

 ered with large vesicles of very unequal size, very close, and irregu- 

 larly arranged. Specimens preserved in alcohol bave a uniform brown 

 color." 



Coasts of Chili, — Eydoux (Mus. Paris). 



The single character upon which the genus, Cystlactis, is based is 

 too indefinite, or too imperfectly defined, to be of much importance 

 in identifying genera. Specimens from Brazil, that appear to be iden- 

 tical with C. Gaudichaudi E. and H., appear, however, to be gener- 

 ically distinct. The same is true of Cystlactis Eugenia D. and M.,f 

 from St. Thomas. But, so far as the description shows, C. Eydouxi 

 may not differ from Cladactis, since it is not stated whether the mar- 

 ginal tubercles be simple or compound. Should they prove identical, 

 Cystlactis may, therefore, be restricted to C. Gaudichaudi and 

 similar species. 



Anthopleura Duch. and Mich. 



Antli(ypleuTaY>. and M., Corall. des Antilles, p. 40, 1860; ditto (pars), Supl. Corall. 

 des Antilles, p. 32, 1864-6. 



Column subcylindrical, somewhat elevated, bearing adhesive, verru- 

 ciform suckers with concave tops, which are arranged in longitudinal 

 rows, and diminish in size and frequency toward the base. Margin 

 surrounded by a circle of elongated papillae, corresponding to the 

 rows of suckers, and more or less lobed or incised, with small per- 



* G. cavernata {Bunodes cavernata V.) from S. Carolina, has the wall perforated by 

 small, inconspicuous pores, from which water may be ejected. 



f Supplement Corah, des Antihes, in Mem. Reale Accad., Turin, xxiii, p. 129, PL vi, 

 fig. 1, 1866. 



