Vdriaiions of Paris quadrifolia, 429 



E. rufibranchialis. — Corpore limaciformi, albido ; filamentis branchialibus 

 numerosis, longis, coccineis, apice albis ; tentaculis quatuor. 



E. rufibranchialis. — Body snail-like, whitish ; branchial filaments nu- 

 merous, long, scarlet, tipped with white ; tentacula four. 



This new E^olis was found creeping on some corallines 

 dredged up in Berwick Bay. The body, when fully extended, 

 is half an inch long, whitish, somewhat transparent, soft, 

 oblong, tapered behind ; branchial filaments slightly tapered, 

 disposed in two interrupted rows along the margins of the 

 back ; sides white, smooth ; foot narrow, white ; tentacula 

 white, conical, the superior rather shorter and wrinkled, the 

 inferior more slender and smooth ; eyes two, extremely 

 minute, placed at the base of the superior tentacula. The 

 branchial filaments are unequal in length ; they are carried 

 erect when the animal creeps in the water, but fall down on 

 its sides when removed from it. Each filament consists of a 

 red central part, which is enveloped in a transparent soft 

 skin or coat; and the white tips appear as if they were per- 

 forated. 



Our figure exhibits the animal considerably magnified ; for 

 in such minute creatures as these are, figures of the natural 

 size are of no utility. 



Bermck upon Tweed, March 18. 1832. 



Correction to the Name of the Species of Plandria de- 

 scribed p. 344 — 346. — The recovery of a long lost note- 

 book has enabled me to ascertain that the subject of my last 

 illustration is the Planaria vittata of Mr. Montagu (JLin, 

 Trans., vol. xi. p. 25. tab. 5. fig. 3.). The differences which 

 may be remarked in our descriptions proceed evidently from 

 their being taken from the animals when in different states of 

 repletion. Montagu, therefore, is the discoverer of this 

 species in Britain. His specimens were found on the coast 

 of Devonshire; and Dr. Fleming has also seen it in the 

 north of Scotland. 



Art. VII. On the Varieties of Paris quadrifolia, considered ivith 

 respect to the ordinary/ Characteristics of Monocotyledonous Plants, 

 By the Rev. J. S. Henslow, A.M., King's Professor of Botany 

 in the University of Cambridge. 



The flowering stems of Paris quadrifolia {fg, 86. «) bear 

 one whorl of leaves, and four whorls in the floral organs ; and 

 in the most common state of the plant these whorls are 

 respectively composed of four leaves, four sepals, four petals, 



