18 LIMACID^. 



mal have been found excepting as to its locality. The 

 characters, however, are sufficiently marked to distinguish 

 the species. From its slight reticulation, in its contracted 

 state, it must have been quite smooth when extended. 

 Its colors are similar to those of TehennopJiorus Carolin- 

 iensis, and similarly distributed. The lower tentacles are 

 not very conspicuously spui-red, but the puncture for the 

 protrusion of a spur is manifest. 



As the anatomical details have been fully given in the 

 first part, this animal, the only one of the genus yet 

 found in the United States, will not be without interest. 



Genus TEBENNOPHORUS, Binney. 



generic characters. 



Animal. Body somewhat flattened, terminating ob- 

 tusely, or in a somewhat truncated foi-m. Back con- 

 vex, more flat when fuUy extended. Integmnents with ir- 

 regular vermiform glands, anastomosmg with each other, 

 and having a general longitudmal direction. Mantle 

 covering the whole body. Locomotive disk expanded at 

 its margin, and ^^sible beyond the sides of the mantle ; 

 no median band. Respiratory orifice near the head. 

 Anal orifice contiguous to, and a httle above and in 

 advance of, the pulmonary orifice. Orifice of organs 

 of generation behind and below the superior tentacle. 

 Without terminal mucous pore. No shell. 



