THE NAUTILUS. ib | 
NEW WESTERN SLUGS. 
BY: T. D. A. COCKERELL. 
Prophysaon pacificum Cockerell, n. sp. 
Length (in aleohol) 173 mill. Body and mantle ochery-brown, 
head and neck gray. Mantle granulated, rather broad, with a black 
band on each side not reaching the anterior border ; these bands are 
furthest (2+ mill.) apart near the respiratory orifice, from which 
point they converge posteriorly, and anteriorly by the bending of 
the band on the right side. Length of mantle 7} mill., breadth 4 
mill. Respiratory orifice 34 mill. from anterior border. Body 
cylindrical, rounded and very blunt at end, not conspicuously taper- 
ing. Distance from posterior end of mantle to end of body, 8 mill. 
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 10 well- 
marked ribs. Lingual membrane, with about 35-1-35 teeth ; centrals 
tricuspid, the side cusps very small, laterals bicuspid, marginals with 
a large sharp straight point, and asmall outer one. Compared with 
P. humile the centrals are slightly shorter and broader. Liver dark 
gray-brown. 
Found by Mr. H. F. Wickham under logs in ditches by the road- 
side 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, n. sp. 
Length Gin aleohol) 25 mill. 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 mill., breadth 53 mill. 
Respiratory orifice 5 mill. from anterior border. Body cylindrical, 
hardly tapering, and blunt at end. Distance from posterior end of 
mantle to end of body, 14 mill. 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 
