66 THE NAUTILUS. 



tion was given. The chitons obtained were made the subject 

 of a paper by Dr. S. S. Berry in the Proceedings of the Cali- 

 fornia Academy of Sciences (Fourth Series, Vol. VII, No. 10, 

 September 1, 1917, pp. 229-248). All species of which I was 

 doubtful as to identity were submitted to Dr. Wm. H. Dall 

 and named by him. For this kind assistance I wish to express 

 here my very great appreciation. 



The following is a list of species of bivalves taken with brief 

 notes on same: 



Terebratidina caput-serpentis Linn. Several young specimens 

 dredged in 50-60 fathoms. 



Terebratalia transversa Sby. Common 5-30 fathoms. 



Laqueus Jeffrey si Dall. Abundant in 65-75 fathoms. 



Nucula tennis Mont. Rare. One or two dead valves and one 

 living young specimen dredged. 



Nucula (Acila) castrensis Hds. Common 40-50 fathoms. At 

 Waterfall, Prince of Wales Island, plentiful in 10 fathoms. 



Leda minuta Fabr. Fairly common 20-40 fathoms. 



Leda penderi Dall. One dead valve dredged. Rather com- 

 mon at Waterfall in 10 fathoms. 



Leda fossa Baird. A few dead valves dredged in 75 fathoms. 



Glycymeris septentrionalis Midd. Rather uncommon. 



Glycymeris corteziana Dall. Abundant 20-40 fathoms. 



Glycymeris migueliana Dall. Fairly common 20-40 fathoms. 



Philobrya setosa Cpr. Fairly common. 



Pecten (Chlamys) hericeus Gld. Found occasionally. 



Pecten (Chlamys) hindsi Cpr. Abundant from low-tide line 

 to 60 fathoms. 



Pecten (Chlamys) islandicas Mull. A few specimens taken in 

 dredge with last species. 



Pecten (Chlamys) caurinus Gld. Single dead valve dredged. 



Pecten (Pseudamusium) randolphi Dall. Two young speci- 

 mens dredged in 50 fathoms. 



Pecten ( Propeamusium} alaskense Dall. Fairly common in 

 50-60 fathoms. 



Hinnites giganteus Gray. Rather common. More abundant 

 in inside channels. 



