ON MOLLUSCA OF THE WEST COAST OF \ORTH AMF.RICA. 



663 



461. 



401 />, 

 402. 



403. 



4036. 



403 c, 



4(54. 



4(55. 



4(50. 



407. 



408. 



409. 



470. 



471. 



472. 

 473. 

 474. 



475. 

 470. 

 477. 



478. 

 479. 



480. 



Monoceros engonatum, Conr. = unica>-itiatutn, Sby. Brown-dotted, with sharp 

 posterior keel, snioothi.sh. Beach, Cp. 



Miiiwceros ?\'a.v..spirafiiin (Blainv.). Lijiht colour: scaly; hnra not developed. 



Monoceros lapilloides, Com:=27uiictatu)n,Griiy-\-breciile)is, Conr. Not should- 

 ered : shape of lapillus. 



Ocinebra lurida, Midd. (Genus reconstitutf^d for Muricoid Purpuiids with 

 irregular varices.) Like canalictdata, brown, with swelling ribs. Beach on 

 Cat. Is. liA-ing. Cp. 



Ocinebra var. aspera, Baird. Sculpture rough. 



Ocinebra var. inunda. Tall, with faint .sculpture. 



Ocineb a interfossa, n. s. Purple-brown, with latticed sculpture. 



? Ocinebra Poidsoni, Xutt. Shape like M. monoceros, with brown spiral line*. 



Cerostoma foliatum, Gme:\. = monodon, l']sch. Large, with winged varicfs. 



Cerostoma XtiftalUi, Conr. Smaller, pear-shaped : interstices scarcely sculptured. 



Cerostoma monoceros, Sby. Spire raised : whirls rough, roimded. 



Chorus Belcheri, Hds. Sulph. Very large, with irregular varices like Trophon. 

 L. w. com. Cp. 



Nitidelh Oo'ddii, Cpr. P. Z. S. 1F~0, p. ?08. Slender : like thin A. gausapata, 

 with Pui'puroid operc. 



Pedicularia Califomica, Newc. Small, purple, highly sculptured. 



Family Muricidee. 



P/eronotusfesth'Hs, lids. Sulph. Form irregular; fiills reflexed. 



Muricidea Californica,Hd!i.HiilY>h. Varices faintly developed. L.w.-20fm. Cp. 



Trophon tnidttcosfa'us, Esch.= Guuneri, Lov. live. Frills spiny behind: not 



sculptured spirally. Circumpolar. 

 Trophon Orpheus, Gld, E. E. Like the List, with distant spiral riblets. 

 Trophon trianffdahts,n. a. Typhoid shape : frills triangular, white. GOfm.Cp. 

 Siphonalia Kellettii, Fbs. P. Z. S. 18.50, p. 274. Very large, tiurited, with 



swollen whirls. .Also Japan. 1 hving Oi in. long. 

 Siphonalia fu scot incta, n. s. Like the same in extreme miniature. 

 Chri/soloiniis tabula/us, Baird, P. Z. S. 1803, p. 6(5. Large, with posterior keel, 



ami delicate sculpture. 120 fm. dead. Cat. Is. Cp. 

 Chn/sodoinus liratus. Mart. = dtcemcostatus, Midd. (? Say) = Middendorffii, Coop. 



Swollen, with dislaut keels. Whidby's Is. 



149 



