EASTEtlN PROVINCE iNTEtllOR REGION SPfiCIES. 245 



behind the insertion of the eye-peduncle. The mantle is closely con- 

 nected with the body. Length, 18""°'. 



Fhilotnycus dor sails, Binney, Bost. Journ. Nat. Hist., iv, 174 (1842); Proc. Bost. Soc. 

 Nat. Hist., 1841, 52.— Adams, Shells of Vermout, 1(53 (1842).— Gray and 

 Pfeiffer, Brit. Mns. Cat., 159.— jTryon, Am. Journ. Conch., iii, 317 (1868). 



Limax dorsalia, De Kay, N. Y. Moll., 22 (1843). 



Tebennophorua dorsalia, Binney, Terr. Moll., ii, 24, pi. Ixiii, fig. 3 (1851). — W. G. Bin- 

 ney, Terr. Moll., iv, 31 ; L. «& Fr.-W. Sh., i, 301 (1869).— Gould and Binney, 

 Invert, of Mass., ed. 2, 460 (1870), 



Pallifera dorsalia, Morse, Journ. Portl. Soc, i, 8, fig. 5; pi. iii, fig. 6 (1864).— W. G. 

 Binney, Terr. Moll., v, 249. 



Vermont, Massachusetts, New York, thus appearing a species of the 

 Northern Region. From Kentucky I have received specimens of this 

 or an allied species 5 it may therefore extend into the Interior Eegion. 



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 se- 

 creted 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 many 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. It sometimes 

 climbs trees. 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 Rafin- 

 esque ; but, from the poverty of his descriptions, we are unable to iden- 

 tify it with 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 Philomycus, 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 con- 

 traction caused by the liquor revealed and detached the mantle from its 

 adhesion. Its characters, therefore, correspond with those of the pres- 

 ent genus. 



Jaw (see Fig. 259) low, wide, ends blunt, anterior surface with nine 

 stout ribs. 



Lingual dentition (see Terr. Moll., V, Fig. I) : Mr. Morse gives 115 

 rows of 56-1-56 teeth each, with perfect laterals. In the si^ecimen ex- 

 amined by me I found 29-1-29 teeth, with 11 perfect laterals, a differ- 



