72 BULLETIN OF THE MUSEUM OF COMFAHATIVE ZOOLOGY. 



PLATE VIII. 



Fig. 1. Epizoanthus Americanus on Eujxi'jurus pubescens. Natural size. From the 

 Gulf of Maine, liSTo. 



" 2. Aduiuaia sociabiUs V. on Culapinjunis Sparreri A. M.-Edw. (= Hemipagurus 

 socialis Smith), drawn from hie. Side view in its natural position, en- 

 larged 2 diameters, showing the basal chitinous pellicle from which the 

 basal disk has partially withdrawn. In this example it had a fragment 

 of Dentalium for a nucleus. 



" 3. Adainsia sociabitis 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 the basal disk. 



" 4. Urticina cuiisors V. on Sympugurus pictus Smith. One half natural size. 

 Drawn from the living specimens in natural positions. 



" 6. E]ii~uantlius parjuripldlus V., on I'uraj)u<jarus pilosiinanus Smith. Natural 

 size. Drawn from an alcoholic specimen partially contracted. 



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

 fex 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. 

 Emertou. 



