140 AMERICAN JOURNAL 



notched the median line below, entire above. Tentacles two, 

 small, short, distant on the back of the head. Proboscis swollen 

 at the extremity, furnished with two long, cylindrical, tentacular, 

 retractile, appendages. Suckers in two small, compact bunches, 

 like bunches of grapes. These parts whitish. Pedal disk cordi- 

 form, purple with a black spot. Foot long, slender, linguiform. 

 Branchiae short, inconspicuous. 



Length, 1-0 ; diam. of body, -3 ; spread of pinna), 1-15 in. 



Habitat— North Pacific Ocean, lat. 37° 8', Ion. 136° 10'. 

 July, 1866, Coll. reg. No. 301, W. H. Dall. 



I can find no descriptions or figures which appear applicable 

 to this species, which is rather abundant off the West Coast of 

 the United States, from lat. 35° to 45°. 



HYALIIDiE. 



CLEODORA. Peron and Leseur. 

 Cleodora occidentalis, n. s. 



Pinnas regularly rounded, broader at their distal extremities, 

 yellowish white. A deep purple black spot on each side of the 

 mouth; pedal disk brown, small, transversely rounded. A small 

 white vermicular filament on each side of it. Viscera with the 

 intestine spirally twisted, crimson ; liver reflecting a metallic 

 green ; heart dark brown. Shell tricarinated, transversely stri- 

 ated, sides a little concave, tip straight. Lon. *6 ; lat. -45 ; lat. 

 of pinnas, '9 in. 



Habitat. — North Pacific, off the coasts of California, in lat. 

 33°, lon. 130° W.j and to the northward in abundance. 



This species is nearest to the O. pyramidata, with authentic 

 specimens of which I have compared both shell and animal. It 

 is constantly smaller and more acuminate, and the animals differ 

 widely. As before mentioned, more extended descriptions are 

 in progress, and will be accompanied with anatomical details. 



Class CONCHIFERA. 



SOLENIDiE. 



SILIQUA, Meg. v. Muhlf. 

 Machcera, Gld., Cpr. Aulas, Oken. 



SlLIQUA PATULA, Dixon. 



Solen patula, Dixon, Voyage round the World, p. 334, f. 2, 

 1789. 



