TEBENNOPIIOUUS. 301 



Phllowycus dorsalh, Binnev, Bost. Journ. Nat. flist. IV, 174 (1842); 

 Proc. Bost. Soc. Nat. Hist. 1841, 52.— Adams, Shells of Vermont, 

 163 (1842).— Gray & Pfeikfur, Brit. Mus. Cat. 159. 



Umax dorsulis, DeKav, N. Y. Moll. 22 (1843). 



Tebennophorus dorsa/is, Binney, Terr. Moll. II, 24, pi, ]xiii,f. 3 (1851). — 

 W. G. Binney, Terr. Moll. IV, 31. 



Pallifera dorsalis, Morse, Journ. Portl. Soc I, 8, f. 5 ; pi. iii, f. 6 (18(54). 



Yerniont and Massachusetts. 



This animal is found in woods and forests, in the soil under 

 decaying trunks and logs. It is lubricated by a watery mucus 

 which is not secreted in quantity sufficient to preserve its life 

 when removed from its native haunts and exposed to the air. It 

 is even difficult to preserve it long enough for examination, as it 

 becomes dry, diminishes in bulk more than one-half, and dies. 

 We have seen but three specimens. They were very active in 

 their movements, and one of them suspended itself by a thread 

 of mucus, in the manner of the Limaces. Our specimens were 

 found in Vermont. Dr. Gould has recognized this or a similar 

 species near Boston. 



It is quite possible that this is one of the species described by 

 Rafinesque, but from the poverty of his descriptions, we are 

 unable to identify it witli either of them. 



When Dr. Binney for the first time procured this animal, not 

 being able to distinguish the separation of the margin of the 

 mantle from the edge of the foot, he felt assured that it must be 

 a species of Rafinesque's genus Philomi/cus, and he accordingly 

 described it as such. Having an opportunity since that time of 

 examining several of them, he noticed, on throwing some of them 

 into alcohol for preservation, that the contraction, caused by the 

 liquor, revealed and detached the mantle from its adhesion. Its 

 characters, therefore, correspond with tliose of the present genus. 

 It is by no means certain, however, 

 that it may not prove to be the young 

 of the preceding species. 



Since the above was written, Morse 

 has published (Journ. Portl. Soc. I, 



8) a figure of the jaw and lingual Z,^ ^^ Tebennophorus dorsali^ 



membrane of this species which difTcr 



sufficiently from those of T. cai-olinensis to warrant its generic 



distinction. I have hesitated to adopt his name Pallifera until 



