The Actiniae of the Plate Collection. 289 



large as those I exaniined, and the Variation whicli I found seems 

 to indicate that tlie number of perfect and fertile mesenteries may 

 increase witli age. 



24. Cribrina eJonf/ata n, siy. 



No. 25 a. Iquiqne. 20 metres. 1 specimen. 



The Single individual of this species (Fig. 82) was contracted 

 so that the tentacles were completelj^ concealed and was of a 

 cylindrical form terminating distally in a dorne. The base was flat 

 but there was not that sharp distinction between base and column 

 nsually found in adherent individuals, a condition which was possibly 

 related to the fact that the bottom on which the specimen was 

 dredged was sandy. The column was marked with fine longitudinal 

 ridges and in its distal two-thirds was provided with well marked 

 Verrucae, most abundant on the terminal dome and more scattered 

 and less prominent proximally. No foreign bodies were adherent to 

 the Verrucae. 



The column measured 1.5 cm in height and 0.5 cm in diameter. 

 Its distal domed portion had a distinct dark grey coloration, as 

 had also the Verrucae on the uppermost portions of the column. but 

 otherwise there were no traces of color remaining. 



Structure. The ectoderm of the base resembled that of the 

 column, except that it was almost destitute of gland cells, which 

 were, on the contrary, very abundant on the column, whose ectoderm 

 was thicker than the mesogloea. The Verrucae did not possess pyri- 

 form cells. The endoderm in the distal part of the column, and to 

 a certain extent in the tentacles contained quantities of a dark 

 brown granulär pigment, to the presence of which the coloration of 

 the column and the Verrucae was due. The circular musculature 

 was rather weak but there was a fairly streng sessile circumscribed 

 sphincter which had the form shown in Fig. 83. No signs of acro- 

 rhagi were observed; the Verrucae extended distally to the margin. 

 The ectoderm al muscles of the tentacles and disc were moderately 

 developed and were not imbedded in the mesogloea. 



The stomatodaeum was ridged and possessed two siphonoglyphs 

 which were not situated opposite one another, and in accordance 

 with this lack of symmetry the mesenteries were arranged irregularly. 

 There were in all thirty-flve pairs, which seemed to belong to three 

 diiferent cycles. The first two cycles were perfect and were provided 



