NO. 9 MARINE INVERTEBRATES, ALASKA — MacGINITIE 75 



alhus, 7. Tunicates — Didemnum alhidum, lo ; Chelyosoma macleaya- 

 num, 4; Boltcnia echinata, 12; B. ovifera, 5. 



Station 38 was in a less productive area than the above station. 

 The bottom of pebbles, gravel, and mud does not provide as much 

 attachment space as does the type of bottom in Station 37. Animals : 

 Hydroids — Tubidaria sp., 3 ; Thuiaria elegans, 4. Anthozoans — 

 Cerianthus sp., 8. Bryozoans — En€ratea loricata (C). Entoprocts — 

 Barentsia gorbunovi (C). Amphipods — Anonyx nugax, 3; Byhlis 

 gaimardii, 5 ; Melita dentata, 5. Pelecypods — Liocyma fiuctuosa, 3. 



Station 39 was either a muddy spot in the rubble zone or else a 

 tongue of the muddy zone extending into the rubble zone. Animals : 

 Polychaetes — Nephtys ciliata, 6; Sternaspis sciitata, 3; Chone duneri, 

 3. Pelecypods — Macoma calcarea, 14. 



Station 40, in the gravel zone, yielded little of note besides 

 Nemerteans — Tuhulanus capistratus, i ; and Gastropods — Aldisa zet- 

 landica ( ?), i. 



Station 41 was in one of the less productive areas of the rubble 

 zone. There were few stones of intermediate size and the contrast 

 between the gravel and small stones and the large rocks was marked. 

 However, the haul was satisfactory and several noteworthy animals 

 were brought up: Turbebellarians — Acerotisa arctica (new), 2. 

 Nemerteans — unidentified sp., 6. Brachiopods — Hcmithyris psittacea, 

 6. Bryozoans — Dendroheania murrayana, 4 ; Ragionula rosacea, 4 ; 

 Emhallotheca stylijera (C) ; Porclla minuta (C) ; Mucronella micro- 

 stoma (C) ; Oncousoecia canadensis (C) ; Borgiola pustulosa, n. sp., 

 I very large col. ; Lichenopora verrucaria (A). Polychaetes — Tricho- 

 hranchus glacialis, 6. Holothurians — Psolus fabricii (C). Amphi- 

 pods — Macra dayiae, 7; Unciola leucopis, 5. Decapods — Pagurus 

 trigonocheirus, few; Hyas coarctatus alutacens, few. Pelecypods — 

 Nuculana minuta, 3; Astarte borealis, 3; A. montagui (C) (many of 

 them drilled) ; Yoldia my alts (C). Gastropods — Natica clausa (C) ; 

 Boreotrophon clathratiis, 3; B. bcringi, i ; B. pacificus, i. 



Station 42, in the rubble zone, with some perforated rocks, was 

 very rich in animal life: Hydroids — Thuiaria elegans, 16; unidenti- 

 fied calyptoblast No. i (AA) ; calyptoblast No. 2 (C). Antho- 

 zoans — unidentified sea anemone (C). Nemerteans — Amphiporus 

 angulatus, 8 ; Tetrastemma candidum, 4 ; Tubulanus albocinctus, 3. 

 Sipunculids — Golfingia margaritacea, 10. Bryozoans — Hincksina 

 gothica, n. sp. (C) ; Eucratea loricata (A) ; Tricellaria erecta (A) ; 

 Ragionula rosacea, 4; Porella minuta (C); Costasia surcularis (C) ; 

 Myriosoum subgracile (A) ; Oncousoeicia canadensis (C) ; Diploso- 

 len obelium (C) ; species encrusting rocks (AA). Entoprocts — 



