[taylok] marine MOLLUSCA OF THE PACIFIC COAST 237 



last, L. conceptionis, ranges, according to Dall. from Alaska to Santa 

 Barbara, and has been taken in deep water olf our coasts. 



Genus Yoldta. 



Our species of Yoldia are dealt with in some detail by Di*. Dall in 

 his paper last cited. He shows that our two commonest forms, which 

 have stood since Cai-penter's time as Y. lanceolata, J. Sby., and Y. amyg- 

 dalea, Yal., have both been incorrectly determined, and should be named 

 respectively Y. ensifera, Dall (Bull. N. H. Soc. B. C, 2, p. 9, pi. ii, fig. 4), 

 and Y. arctica, Gray. Dall also figures two new species, namely, Y. 

 Martyria, Dall (I. c, p. 9, pi. ii, fig. 15), Puget Sound, 35 to 135 fathoms, 

 and Y. Mmitereyensis (J. c, pi. ii, fig. 16), previously described by him 

 in the " Nautilus " ' (vol. vii, no. 3, p. 29, July, 1893). This species ranges 

 from the Aleutian Islands to Monterey in 30 to 695 fathoms. It has 

 been dredged in Puget Sound by the United States Fish Commission in 

 30 fathoms, and on the coast of British Columbia, off Vancouver Island, 

 in 238 fathoms. 



Our list will therefore stand as follows : 



35. Megayoldia thraci^formis, Storer (genus Megayoldia, Verrill and 



Bush). 



35a. Yoldia Montereyensis, Dall. 



36. Yoldia ensifera, Dall. 



37. Yoldia seminuda, Dall. 



38. Yoldia limatula, Say. 



39rt. Yoldia martyria, Dall. 



40. Yoldia arctica, Gray. 



Species 39 in my Preliminary Catalogue must be dropped from the 

 list, the specimens having proved to belong to a variety of Y. limatula. 



Genus Malletia, Desmoulins. 



Four species of this genus, which has not hitherto been recorded 

 from the northwest coast of America, were dredged by the United States 

 Fish Commission steamer "Albatross" in deep water off the British 

 Columbian and western United States coasts, and ax-e described and 

 figured by Dall in the "Bulletin of the Natural History Society of Brit- 

 ish Columbia," so often referred to. 1 think they may all with propriety 

 be placed on the British Columbian list. They are as follows : 



* " On a New Species of Yoldia from California." 

 Sec. IV., 1899. 15 



