THE NAUTILUS. 67 



(Limatula) subauriculata Mont. Dead valves common 

 25-50 fathoms. Living specimens rarely taken. 



Monia macroschisma Desh. Rather common. 



Mytilus californianus Conr. Abundant. Some specimens at- 

 taining a length of nine or ten inches. 



Modiolus modiolus Linn. Occasional. Abundant in inside 

 waters. 



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

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



^fu,sculus laevigatus Gray. One or two dead valves dredged. 



Musculus vernicosus Midd. Common at times in sea weed at 

 extreme low tide mark. 



Thracia curia. 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) forresterensis Willett. (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) saxico/a Baird. Dredged rarely. Rather 

 plentiful in inside waters. 



Lyonsia (Entodesma) inftata Conr. One living specimen 

 dredged in 50 fathoms. 



Lyonsia striata Mont. Occasional 30-60 fathoms. 



Mytilimeria nuttalli Conr. Fairly common. 



Cuspidaria planetica Dall. Not rare 50-60 fathoms. 



Astarte compacta Cpr. Abundant 25-60 fathoms. 



Astarte willetti 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 (MiodontLscus) prolongata Cpr. Rather common 

 with the last. 



