178 BULLETIN OF THE 
It will be remembered that Fischer considers Prophysaon a subgenus of 
Anadenus. 
The geographical distribution of Anadenus would seem to preclude its being 
found in California, but to that genus only can I refer the species whose de- 
scription here follows. 
Anadenus Cockerelli, Hemruıtr. 
Plate I. Fig. 1; Plate III. Fig. 5. 
Length (contracted) 134 mm. ; mantle, length 43, breadth 2 mm. End of 
mantle to end of body, 8 mm. Foot, breadth 2 mm. Foot with the locomotive 
disk, being distinctly differentiated into median and lateral tracts. Respira- 
tory orifice slightly posterior on right side of mantle. Genital orifice below 
right tentacle. No caudal mucus pore. Locomotive disk about half as wide 
as either lateral area. Sides of foot wrinkled, but not differentiated from 
lateral areas, nor specially marked, the wrinkles being a continuation of the 
transverse grooves of the lateral areas. Mantle tuberculate-rugose, oval in 
outline, bluntly rounded at either end ; not grooved as in Amalia. Mantle 
free in front as far as respiratory orifice, Back rather bluntly keeled its 
whole length; rugæ rather flattened and obscure, consisting of grooves en- 
closing mostly hexagonal lozenge-shaped spaces, which are themselves rugose. 
Solor uniform brown-black, without markings, except some dark marbling on 
the lighter sides. The portion beneath and in front of the mantle is pale, and 
the head and neck have a gray tinge. Foot brown. Shell internal, thinnish, 
white, oval in outline. Stomach large, swollen, broad. Liver pale ochrey. 
Anadenus Cockerelli, Hemen, The Nautilus, Vol. IV. No. 1, May, 1890, p. 2. 
Anadenulus, CocKERELL, Ann. Mag. Nat. Hist., Oct., 1890, p. 279. 
Cuyamaca Mountains of San Diego Co., California. Mr. Henry Hemphill. 
Jaw low, wide, slightly arcuate, ends blunt, anterior surface with about 
twenty wide, flat ribs, squarely denticulating either margin. (Plate III. 
Fig. 5.) : 
Lingual membrane short and narrow. Teeth 20-1-20, of which eight only 
on either side are laterals. Centrals tricuspid, laterals bicuspid, marginals 
quadrate, bluntly bicuspid. (Same Plate.) 
Prophysaon Hemphilli. 
From Portland, Oregon, Mr. Hemphill brought seventy-seven individuals of 
a slug which may prove a variety of P. Hemphilli. They have the tawny color 
of flavum. The internal shell is so delicate, it is impossible to remove it 
without breaking it. The penis sac is as in P. Hemphilli. The mantle is 
sometimes smooth, sometimes tuberculate; its fuscous lateral bands are some- 
times united by a transverse posterior band. Some of the individuals had the 
tail constricted preparatory to excision. (See below, under Phenacarion.) 
