112 THK NAl'TILl'S. 



nieetin<>- in a longitudinal inediaii groove, wliicli divides the foot into 

 two poi'tions. I/iver pale grayish. " Uniform tawny a?; ir' Limax 

 fiacits. It ^^trt'tches itself out in a worm-like shape unlike other 

 species. Internal shell plate, jaw and tongue as in Anden^oui." 

 (W. G. Binney.) 



Gray's Harbor, AVashingtou. (Hem])hill, 188i).) 



This is probably a variety of P. pacificum. 



Prophysaon coeruleum, n. .-ii). 



Length (in alcohol) 22-2 mill., in motion, 4.') mill. Body and 

 mantle clear l)lue-gray, paler at sides, sole white. Mantle finely 

 granulated, broad, without markings. Length of mantle 7 mill., 

 breadth o mill. Respiratory orifice 22 mill, from anterior border. 

 Body subcylindrical, tapering, pointed. (In one specimen eaten off 

 at the end.) Distance from posterior end of mantle to end of body, 

 W\ mill. 



The reticulations take the form of longitudinal equidistant lines, 

 occasionally joined by transverse lines, or coalescing. Sole not 

 differentiated into tracts. Jaw pale, strongly ribbed. Liver white. 

 Mr. Binney sends me colored drawings of the living animal ; the 

 neck is long and white, or very })ale. Mr. Binney has examined 

 the jaw and lingual, and finds them as usual in the genus. Several 

 specimens were sent from Olynipia, Washington Ter., from yiv. 

 Hemphill to ]\[r. Binney. 



P. carulenm is an exceedingly distinct species, distinguished at 

 once by it color and the chai'acter of its I'eticnlations. 



Prophysaon coeruleum var. dubium n. var. 



Length (in alcohol) 8 mill. Length of mantle 4 mill. Distance 

 from posterior end of mantle to end of body 3 '> mill. ^Mantle broad, 

 with four bands composed of coalesced black marbling, very ir- 

 regular in shape, and running together anteriorly. Body dark, 

 tapering. Sole pale, its edges gray. Liver white. 



With the P. creruleum is a small dark slug, probably a variety of 

 it, but differing as described above. It will easily be distinguished 

 by its blackish color and the peculiar ma^•kings on the mantle. 



Prophysaon humile Cockeroll, n. :^p. 



Length (in alcohol) 16] mill. Body above and mantle smoke- 

 color, obscured l)y bands. Mantle wrinkled, and having a broad 

 dorsal and two lateral blackish bands, reducing the ground-color to 

 two obscure pale subdorsal bands. Length of mantle 7 mill., breadth 



