THE NAUTILUS. b< 



Li'iiia {Limatula) subauriculata Mont. Dead valves common 

 25-50 fathoms. Living specimens rarely taken. 



Monia mncroschisma Desh. Rather common. 



Mytilus californianiis Conr. Abundant. Some specimens at- 

 taining a length of nine or ten inches. 



Modiolus modiolus Linn. Occasional. Abundant in inside 

 waters. 



Musculns niger Gray. Musculus seminudus Dall. A few speci- 

 mens of each of these species were taken in about 30 fathoms. 



Muscuhis laevigatus Gray. One or two dead valves dredged. 



Muscidus vernicosus Midd. Common at times in sea weed at 

 extreme low tide mark. 



Thracia curta. One dead valve dredged. Rather common at 

 Waterfall in 12 fathoms. 



Thracia challisiana Dall. A few dead specimens taken in 30- 

 40 fathoms. Living specimens were probably all too deep in 

 gravel to be secured by the dredge. 



Pandora (Kennerlyia)forresteren8is\Yi\\eti. (Nautilus, xxxi. 

 1918. p. 134.) Abundant in 60-70 fathoms; less plentiful in 

 more shallow^ water. 



Pandora (Kennerlyia) bilirata Conr. Common 25-50 fathoms. 



Lyonsia (Entodesma) saxicola Baird. Dredged rarely. Rather 

 plentiful in inside waters. 



Lyonsia (Entodesma) injlata Conr. One living specimen 

 dredged in 50 fathoms. 



Lyonsia sinata Mont. Occasional 30-60 fathoms. 



Mytilivieria nuttcdli Conr. Fairly common. 



Cuspidaria planetica Dall. Not rare 50-60 fathoms. 



Astarte compacta Cpr. Abundant 25-60 fathoms. 



Astarte willelti Dall. (Nautilus, xxxi, July, 1917, p. 10. ) 

 Abundant with the last species. Adults mostly found in the 

 deeper water. 



Astarte alaskensis Dall. Abundant in company with the last 

 two. A. esquimaidti Baird, was found to occur plentifully in 

 10 fathoms at Waterfall, but was not noted at Forrester Island. 



Venericardia, crebricostata Krause. Rather common 20-50 

 fathoms. 



Venericardia ( MiodoniiMUs) prolongata Cpr. R.ither (N^mmon 

 with the last. 



