150 ACTINLi: oi' Al.l'.ATUOSS EXPLORATIONS M'MUKKICII. 



of the mesenteries is not, I ))eli«!\e, of suriicieiit iin[t(ntanee to be 

 generic and in tlie general structure tlteio are undoubted affinities to the 

 Antheada\ ^Vs to the presence of acrorliagi nothing can be said, on 

 accountof the absence of the.ectodei'in, and tlie macerated condition of 

 tbe internal parts prov'iHl a <l(M'ided obstacle to a thorough study of 

 the specimens. 



(J.'iiiis CONDYLACTIS, 1 >n(li. ct Mich. 



The genus Condijhtctis was established in 18(i(> by Duchassaiiig and 

 MicheloRi ('(1(5) for the recejjtion of the common West Indian form C. 

 Xjassijiora. 1 have shown elsewhere ('89) that this form is in all re- 

 spects an Anthead, and that it agrees closely in general characteristics 

 with the form described by Delia (Hiiaje as Actinia aidaiitiacti, subse 

 quently assigned by Andres ('8.')) to tlie genus Cermet is, which is re- 

 ferred to a special family. The generic name "[proposed b.\ l)u<'hassaing 

 and Michelotti has.undoubted priority and must replace that proposed 

 by Andres. I see no good reason Ibi' sei»arating CondylactiH from tlie 

 other Antliea<ls, from which it is distingnished by the absence of acror- 

 hagi and by the ])resence of a fosse between the margin and the bases of 

 the tentacles, as well as by the usual presence of minute verruca' upon 

 the c(dumn wall. 



8. Condylactis ciuentata (l>inia). 



I'lat." \\l. Figs. 20—21. 



Synoiiyuis : Acilnla oiiciihtld, Dana ( 184G) ; drcns (iiioi talus, ^l[lue-F.dv,nr<\s (isr>7) 

 BiDiodcs cnioitiitd, (iossc (1S(!0). 



No. 7i?G. Sandy I'ctiut, Strails of Afancllan. JJttoral. Four .spccinmnM. 



All the specimens (IM. xxi, J«'ig. 1*0) are contracted, the tentacles being 

 concealed; in this condition the height and diameter of the column are 

 about the same .(>.") "". The preserved specimens show no cidoration, 

 but in sections brown granules of i»ignient are found in the endo<lerm 

 of the disk ami tci.J,;', Ics. 



The base is adherent. The column wall is thrown into strong folds, 

 and toward its ni)i)er jiart are rows of \erruca' to which jiarticlesof 

 sand are strongly adherent. The verrui-e cease at the well-marked 

 margin, between wliich and the bases of the external tentacles there is 

 a well-marked fosse, which is made especially evident in contracted 

 specimens by being drawn down by the strong longitudinal nnisdes of 

 the mesenteries. Circular nniscles are developed upon the column 

 wall but are wanting at tbe nun-gin; internally to this, however, a few 

 small muscle prcx-esses are found which represent the si)hiiicter. It is 

 very weak and can have only little elfect in ]»ro<lucing the concealment 

 of the tentacles; this is mainly brought alxait by the longitudinal 

 muscles of the mesenteries. 



The tentacles are not very numerous; tiieir longitudinal nniscles, like 

 the radiating muscles of the disc, are not imbedded in the mesoghjea. 



