300 GASTEROPODES. 



1. EOLIS PLUMATA The Feathered Eolis. Plate XLIV. Figs. 1, 2. 



This animal extends about half an inch when crawling. The body 

 slender, covered by a remarkable profusion of branchiae, disposed in 

 eleven or twelve rows, leaving only a portion of the back bare, behind 

 the head. These are long and slender, and extend considerably over the 

 posterior extremity. Representation of the whole is precluded, from 

 their number. They bear no indifferent resemblance to a feathered cloak 

 in the arc. The shoulder is somewhat enlarged. Colour universally 

 greyish ; tips of the branchiae clear. Only a single specimen has occurred. 



PLATE XLIV. 



FIG. 1. Eolis plumata, back. 

 2. Belly. 



2. EOLIS RACEMOSA Cluster Eolis. Plate XLIV. Figs. 3, 4, 5. 



Length four lines ; breadth under one. Head roundish, with a ten- 

 tacular organ from each side. Body slender ; shoulder enlarged. A black 

 speck or eye at the base of each of the cornicula. Three or four pair of 

 clustered branchise border the back, leaving the remainder bare. The 

 first is composed of ten enlarging elongated papillas, of various dimen- 

 sions, as are those of all the others. 



Colour whitish, with dark brown specks scantily distributed. A 

 brown belt encircles the middle of each corniculum. 



This is a lively animal ; its adhesion is slight, and it is very rare, 

 only one specimen having occurred. 



PLATE XLIV. 



FIG. 3. Eolis racemosa, back. 



4. Belly. 



5. Cluster branchiae, more enlarged. 



