SPONGilS PEOM THE WESTEEN COAST OF NOETH AMEEICA. 133 



Amaknak Island.— W. H. Dall. 1871. 



Halichonth-ia paiiicea. 



Ti'dania fragilis (beach). 



Esperella helios. 



Esperiopsis Quatshwinsis (also 1880, beach). 



Chonilroclaclia Alaskensis. 



Myxilla Barentsi (beach). 



Myjcilla Behringensis. 



Suberites suherea. 

 West of A.maknak Island.— W. H. Dall. 



Halichonth-ia panicca (beach and 60 fathoms). 



Esperilla adiuerens (60 fathoms, rocks, stones, mud). 



Chond rocladia Alaskensis (60 fathoms). 



Myxilla Barentsi (60 fathoms). 



Suberites suberea (60 fathoms). 

 Port Levaskef, among islands.— W. H. Dall. 



Myxilla Amaknakensis (20 fathoms, mud, shells). 

 Chernofsky Bay.— W. H. Dall, beach. 



Halichondria panicea. 



Esperiopsis Quatsinoensis. 



Chond rocladia Alaskensis. 

 Unalaska.— W. H. Dall. 



Halichondria panicea. 1873, (beach). 



Eumastia sitiens. 1873, (beach). 



Esperiopsis Quatsinoensis. 1873, (beach also E. W. Nelson, 1877, beach and U. S. Revenue Steamer "Wyan- 

 dotte," 1868, beach). 



Chondrocladia Alaskensis. 1873, (beach). 



Chondrocladia pulchra. 1873, (beach). 



Myxilla Behringensis 1873, (beach). 



Myxilla Amaknakensis, (beach). 



Clathria Loi^eni. 1873, (beach). 



Phakellia Dalli, (beach). 



Axinella rugosa, (beach). 



Suberites suberea. 1873, (beach). 



13. ATKA ISLAND. 

 Nazan Bay.— W. H. Dall, 10-16 fathoms, sand. 



Siiberites suberea. 

 Atka.-W. H. Dall. 



Esperio2isis Quatsinoensis. 



14. BAY OP ISLANDS, ADAK ISLAND. 



W. H. Dall.— 9-16 fathoms, sand, mud. 



Eumastia sitiens. 



Espcrella lingua. 



Esperella adhœrens. 



Suberites suberea. 



15. CONSTANTINE HARBOUR, AMCHITKA ISLAND. 

 W. H. Dall, beach. 



Halichondria panicea. 



16. KYSKA ISLAND. 

 W. H. Dall. 



Halichondria panicea. 



Esperio2:tsis Quatsinoensis. 



Myxilla Behri7igensis. 

 Kyska Harbodr.— W. H. Dall. 



Halichondria panicea (beach ; 9-14 fathoms, .sand). 



Eumastia sitiens (9-14 fathoms, sand). 



Toxochalina borealis (9-14 fathoms, sand ; 9-12 fathoms, sand, mud). 



Esperella adhœrens (9-12 fathoms, sand). 



Esperiopsis Quatsinoensis (beach ; 9-14 fathoms, sand ; 9-12 fathoms, sand, mud). 



lotrochota magna (10 fathoms). 



My.cilla A>naknakensis (beach ; 9-14 fathoms, sand ; 9-12 fathoms, sand, mud). 



Myxilla firnui (9-14 fathoms, sand). 



