NO. 9 MARINE INVERTEBRATES, ALASKA — MacGINITIE (i^ 



taken in before the haul was complete. Animals : Bryozoans — Rham- 

 phostomella gigantea, i large; Alcyonidium polyoum (C). Amphi- 

 pods — Eurystheus melanops, 23 ; Protomedeia jasciata, 125 ; unidenti- 

 fied caprellid, sp. No. 2, 12. Decapods — Paguriis splendescens, 4; 

 P. trigonocheirus, 33 ; Chionocetes opilio, 5. Pelecypods — Cardita 

 crassidens, 3; Hiatella arctica (AA). Gastropods — Volutopsius 

 stejanssoni, i ; Buccinuni tenue, 2 ; B. angulosum, 2 ; Boreotrophon 



sp., 3- 



Station 15 was in the typical mud zone and few animals were 

 taken : Bryozoans — Borgiola pustulosa, n. sp., encrusting on shell. 

 Amphipods — Symplenstes uncigera, 5. Decapods — Argis lar, 2. 

 Pelecypods — Macoma calcarea (C). 



Station 16 was in the area of the gravel zone but it was a region 

 in which the sand had become segregated from the gravel and it 

 formed a special habitat for certain animals : Amphipods — AcantJio- 

 stepheia behringiensis, 2. Gastropods — Aldisa zetlandica (?), 2. 

 Tunicates — Rhisomolgula glohularis (AAA). (The dredge came up 

 one-third full of these spherical, sand-encrusted animals.) Fishes — 

 flatfish, 7 (about 1.5 in. long). 



Station 17 was in the typical mud zone. Animals: Hydroids — 

 Tubularia sp., i. Nemerteans — Amphiporus pacificus, i ; Tefra- 

 stemma aherrans, 2. Bryozoans — Alcyonidhmi disciforme (C). 

 Amphipods — Byhlis gaimardii (C) ; Pleustes panoplus, 1 ; Wey- 

 prechtia heuglini, 6; caprellid sp. No. 2, 17. Tunicates — Styela rustica 

 macrenteron, 4. 



Station 18 was also in the mud zone. Since an attempt was being 

 made to locate the border of the rubble zone, only a short haul was 

 made. Animals : Bryozoans — Costasia nordenskjoldi, 3 ; Alcyo- 

 nidium polyoum (C). Amphipods — caprellid sp. No. 2, 10. Deca- 

 pods — Pagurus trigonocheirus, 3. 



Station 19 was also in a muddy area, so only a short haul was 

 made. Animals : Amphipods — Sympleiistes karianus, i (2d record for 

 this species) ; Rhachotropis aculeata, 5 ; Eurystheus melanops, 6. 

 Decapods — Pandalus goniurus, 2 ; Sabinea septemcarinata, 3. 



Station 20 was in the rubble zone and was one of the richest in 

 animal life. No other station yielded so many echinoderms as this 

 one. Animals : Sponges — Leuconia ananas, 3 ; Myxilla incrustans, 

 2 lots (around barnacles) ; Topsentia disparilis, 3. Hydroids — Tubu- 

 laria sp., 3; unidentified gyninoblast (A) ; Obelia sp. (C) ; Thuiaria 

 sp. (C) ; unidentified calyptoblasts, 3 species (C). Anthozoans — sea 

 anemones (AA). Turbellarians — Notoplana atojnata, 4. Nemer- 

 teans — Amphiporus macracanthus, 4. Sipunculids — Golflngia mar- 



