72 lUJLLETIN OF THE MUSEUM OF COMFAKATIVE ZOOLOGY. 



PLATE VIII. 



Fig. 1. Epizoanthus Americanus on EapiKjurus pubescens. Natural size. From the 

 (iiilt'of Maine, \'6~'6. 



" 2. Adiiijisia sociabilis V. on Cutajxicjurus Sparreri A. M.-Edw. (= Ilevujxifjurus 

 sonialis Smitli), drawn from life. Side view in its natural position, en- 

 larged 2 diameters, showing the basal ciiitinous pellicle from wliich the 

 basal disk lias partially withdrawn. In this e.xaniple it had a fragment 

 of Dcntalium for a nucleus. 



" 3. Adamsia sociabilis V., without the crab. Another example, seen in a 

 posterior view, drawn from a living specimen, showing the chitinous 

 basal secretion, which enclosed the crab, and had been partially uncov- 

 ered by the contraction of tiie basal disk. 



" 4. Uiticina coiisors V. on Sympcii/urus pictus Smith. One half natural size. 

 Drawn from the living specimens in natural positions. 



" 6. Ejiizoanlluis paguripldlus V., on Parapagurus pilosinianus Smith. Natural 

 size. Drawn from an alcoholic specimen partially contracted. 



" 6. Epizoanthus Americanus V., peculiar variety, on a tube of llyahnacia arti- 

 fcx V. Natural size. 

 Figures 2 to 5 are from specimens dredged off Martha's Vineyard by the 

 U. S. Fish Commission, in 1880 and 1881. For the use of these and 

 several other drawings of actinians made from life, I am indebted to the 

 U. S. Fish Commission. All the drawings were made by Mr. J. H. 

 Emerton. 



