234 PROCEEDINGS OF THE ACADEMY OF [1898. 



attached to one side above ; epiphallus moderately stout, longer 

 than the penis, bearing the retractor muscle near its base. Sperm- 

 atheca globular, large, borne on a duct of its own length, inserted 

 upon the atrium. 



Type locality, Astoria, Oregon (Hemphill) ; also in Washington 

 atChehalis; and according to Binney, Olympia and Gray's Har- 

 bor. 



Part of several of the references given above apply to H. came- 

 lus, Mr. Binney having included that species in glandulom. The 

 latter is herein restricted to slugs with papillose mantle and caudal 

 horn, as originally indicated by Bland and Binney. 



Besides the conpsicuous external differences noticed under H. 

 camelus, the two species differ markedly in the genitalia. In H. 

 glandulosa the fleshy process in the penis is bifid and attached to 

 the side at the apex of the cavity. In H. camelus the process is 

 simple and attached basally. The position of the penis-retractor 

 and the shape of the spermatheca and its duct differ in the two 

 forms. 



H. camelus Pilsbry & Vanatta. PI. IX, figs. 3, 4 ; PI. XII, figs. 41, 42; PI. XVI, 



fig. 85. 



He?nphillia camelus Pilsbrf & Vanatta, Nautilus, XI, p. 44 (August, 1897). 



Color in alcohol pale grayish-buff, closely speckled and maculated 

 with blackish on the mantle and tail, more sparsely and lightly so 

 on the anterior half of the foot, the sole without dark markings. 

 On the mantle the spots form two more or less distinct longitudinal 

 bands. Surface of the mantle somewhat rugose, not papillate ; 

 breathing pore behind the middle. Genital opening near right 

 tentacle. Foot with a short dorsal groove behind mantle, obliquely 

 descending grooves with sparse reticulation on the sides of tail, and 

 coarse reticulation below mantle laterally ; the head longitudinally 

 closely grooved and reticulate ; sole as in H. glandulosa ; tail some- 

 what keeled above near the end, without any appearance of a cau- 

 dal " horn." Foot-margin wide, grooved vertically ; pedal furrows 

 abruptly and conspicuously rising at the tail, with no noticeable 

 caudal pore at their union, at least in alcoholic examples, but in one 

 specimen there seems to be a transverse slit under the pedal groove, 

 with a vertical gutter below it, T-shaped. In another, nothing of 

 this appears. Length about 28 mm. 



Genitalia (PI. XII, fig. 41, 42) with a very large penis, its cavity 

 filled by a large, transversely corrugated, solid, fleshy body attached 

 at the base of the penis, and a small tongue-like body arising close 



