fringed at base, branchial orifices on each side, sub-central, with short arbores- 

 cent plumes. 



Habitat. — Point Pinos, near light house, Monterey, California, on the under 

 side of granite boulders at extreme low tide ; detected by Mr. Harford and my- 

 self in March, 1868. 



TRIOPID^, Gray. 



TRioPA, Johnston. 



Triopa Carpenteri, Stearns, Fig. 2. 



Animal slug-shaped ; anteriorly obtusely rounded, posteriorly pointed, some- 

 whnt attenuated ; cephalic tentacles clavate, upper part of same of an orange 

 color, below white ; gill plumes five, arborescent, resembling fern leaves, tipped 

 with orange ; plumes and tentacles 1-16 inch in length ; the former situated in 

 middle of the back somewhat posterior to centre. Six tentacular processes on 

 each side, tipped with orange and 1-32 inch long ; also short tentacular processes 

 in front of the head ; body one and one-half inches in length, translucent white, 

 covered with fine papillae of an orange color. 



Habitat. — Monterey, at Point Pinos near the light house, on the under side 

 of granite rocks at edge of laminar ian zone, where the above was collected by 

 Mr. W. G. W. Harford and myself in March, 1868. 



This species is named for my friend Dr. P. P. Carpenter of Montreal, whose 

 thorough work in connection with the moUusca of W. North America has 

 been of great service to investigators. 



The above descriptions, though somewhat meagre from lack of the proper in- 

 struments for more careful diaarnosis, are nevertheless adequate to a ready de- 

 termination of both of the above well marked and elegant species. 



Descriptions of New Marine Mollusks from the West Coast of 

 North America. 



BY ROBERT E. C. .STEARNS. 



CoNUS Dai-li, Stearns. Plate I, fig. 1. 

 Shell conical, robust with a smooth surface faintly marked with incremental 

 lines; lower third portion of shell obscurely spirally ribbed and the spire ele- 

 vated and indistinctly grooved on the top of each whorl ; body whorl and spire 

 moderately convex, the latter with a distinct sutural line and a faint sulcation 

 parallel to the same ; outer lip simple, aperture linear, internally of a delicate 

 rose-pink tinge ; surface of shell marked with irregular longitudinal stripes of 

 reddish brown and sienna yellow, the former color predominating aud blending 

 in more or less and glazing the yellow ; the longitudinal markings are interrupted 

 by a series of four revolving bands (of which the two lowest are the widest.) 

 composed of numerous whitish spots of irregular size and shnpe but generally 

 small, rounded or angular: occasionally whitish subaugulate spots of larger size 



