210 BULLETIN OF THE 



With the P. cceruleum 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 markings on the mantle. 



Prophysaon Pacificum, Cockerell. 



Plate VII. Figs. B, E, F, H. 



Mr. Theo. D. A. Cockerell gives the following in the Nautilus of February, 

 1890, pp. 111-113 : — 



Length (in alcohol), 17£ mm. Body and mantle ochrey brown, head and neck 

 gray. Mantle granulated, rather broad, with a black band on each side not reach- 

 ing the anterior border; these bands are farthest (2|mm.) apart near the respira- 

 tory orifice, from which point they converge posteriorly, and anteriorly by the 

 bending of the band on the right side. Length of mantle, 7| mm. ; breadth, 4 mm. 

 Respiratory orifice 3£ mm. from anterior border. Body cylindrical, rounded and 

 very blunt at end, not conspicuously tapering. Distance from posterior end of 

 mantle to end of body, 8 mm. Body dark grayish-ochre above, with an indistinct 

 pale dorsal line; sides paler. Reticulation distinct, with indistinct "foliations." 

 Sole somewhat transversely wrinkled, but not differentiated into tracts. 



Jaw dark, strongly curved, blunt at ends, with about ten well-marked ribs (Plate 

 VII. Fig F). Lingual membrane with about 35-1-35 teeth; centrals tricuspid, the 

 side cusps very small, laterals bicuspid, marginals with a large sharp straight inner 

 point and a small outer one. Compared with P. humile the centrals are slightly 

 shorter and broader. Liver dark gray-brown. 



Found by Mr. H. F. Wiekham under logs in ditches by the roadside and damp 

 places at Victoria, Vancouver Island, 1889. 



This is a very distinct species, easily recognized by its color, the absence of dark 

 bands on the body, the pale dorsal line, and the blunt posterior extremity. 



Prophysaon flavum, Cockerell. 



Plate Vn. Fig. K. 



From the Nautilus, 1890, p. Ill: — 



Length (in alcohol). 25 mm. Body and mantle dull ochreous, head and neck 

 ochreous. Mantle tuberculate-granulose, grayish ochre, pale at edges, and with 

 black marbling or spots in'place of the bands of P. Pacificum. Length of mantle, 

 11 mm. ; breadth, 5| mm. Respiratory orifice 5 mm. from anterior border. Body 

 cylindrical, hardly tapering, and blunt at end. Distance from posterior end of 

 mantle to end of body, 14 mm. Body dark grayish-ochre above, with a pale 

 ochreous dorsal line not reaching much more than half its length ; sides paler. 

 Reticulations distinct, "foliated." Sole with well marked transverse lines or 

 grooves, those of either side meeting in a longitudinal median groove, which 

 divides the foot into two portions. Liver pale grayish. 



Uniform tawny, as is Umax flams. It stretches itself out in a worm-like shape 

 unlike other species. Internal shell plate, jaw, and tongue as in Andersoni. 



Gray's Harbor, Washington. (Hemphill, 1889.) 



This is probably a variety of P. Pacificum. 



