38 McMURRICH 



reticular arrangement of the mesogloeal processes cannot be 

 distinguished as clearly as in that form. 



The stomatodaeum is longitudinally ridged and in the speci- 

 mens examined was provided with two siphonoglyphes, which 

 have the same structure as those of C. elegantissima. 



The arrangement of the mesenteries is somewhat irregular. 

 Apparently an hexamerous arrangement is the basis, the pri- 

 maries, secondaries and tertiary cycles being perfect, the last to 

 a less extent than the others. A fourth cycle is also present 

 and is complete, but there are in addition representatives of a 

 fifth and even of a sixth cycle irregularly distributed, a distur- 

 bance of the symmetry being thus produced. 



Both the outer and inner stomata are present. The longitu- 

 dinal musculature is well developed and in sections of the per- 

 fect mesenteries about half way down the column terminates at 

 its outer edge in a strong process from which lateral lamellae 

 arise (Fig". 23). Lower down this arrangement is not apparent, 

 the muscle processes diminishing in size toward each edge of 

 the muscle area. The parieto-basilar (Fig. 24) is well developed, 

 forming a marked fold. The basilar muscle (Fig. 25) is fairly 

 well developed, resembling somewhat that of C. artejnisia, 

 though smaller in accordance with the smaller size of the speci- 

 mens. The tertiary mesenteries are all fertile, and, in addition, 

 reproductive organs occur on some of the mesenteries of the 

 fourth cycle. 



The identification of this species with Brandt's Actinia 

 xantJiograniinica is suggested in the memoranda accompanying 

 Mr. Agassiz' drawing, and though Brandt makes no mention of 

 the conspicuously pink-tipped tentacles yet it is quite possible, 

 indeed probable, that this is the proper identification, as it is 

 evident that the coloration of the species may vary considerably. 



I was for a time inclined to identify it with Verrill's 

 Antliopleiira Dozuii, but hesitate to do so on account of the 

 geographical distribution of that form and the absence of data 

 as to its internal structure. It is evidently a highly variable 

 species, so far as its coloration is concerned, and it may be 

 noted that a specimen from Acajutla is described as having the 



