THE NAUTILUS. 



ation. In comparing them with Limax and Arion, he did not 

 find the mantle shield much shorter than the body, and plainly 

 evident, like the one of those slugs, and came to the conclusion 

 that there was none at all; conceded that it was one of the care- 

 less things he was in the habit of doing. Also, if Philomycus 

 was not the same thing as Tebennophorus, etc., the family name 

 Philomycidoe, in the sense as used, has no claim for recognition. 



THE SHELL OF PHILOMYCUS CARQIINIANUS (BOSC). 



BY WILLIAM F. CLAPP. 



Through the kindness of Mr. J. Henry Blake I recently re- 

 ceived a specimen of Philomycus carolinianus (Bosc. ), from 

 Munsonville, N. H., to examine for internal parasites. On 

 laying open the mantle preparatory to removing the stomach 

 and intestine, I discovered a rudimentary shell. When first 

 noticed, it was not attached, either to the mantle or to the 

 inner membrane which covers the viscera, but was floating free 

 in the liquid in which the dissection was made. From its po.-i 

 tion I believed it to have been dislodged from some portion of 

 the posterior fourth of the animal, between the mantle and the 

 inner membrane. Losing immediately all interest, in possi 

 internal parasites, I gave my attention entirely to the problem 

 of the shell, in an endeavour to ascertain its exact position, and 

 also to discover whether it is to be considered a constant, or 

 merely an occasional character in this species. 



From Dr. R. C. Rush, of Hudson, Ohio, I received fii'ty 

 specimens (M. C. Z. 48211) of living Philomycus in excellent 

 condition. The specimens in this lot show slight variation in 

 color, the majority being of the typical pattern, of a yellowish- 

 white ground color, variegated with brownish and blackish 

 clouds and spots, forming three ill-defined longitudinal bands, 

 one on the center of the back, and one on each flank. There 

 are, however, three specimens easily separated from the rest be- 

 cause of the reddish tinge in the brownish clouds and spots. 

 In these specimens (M. C. Z. 48211 H) the lateral bands are 



