NO. 2 HARTMAK : QUANTITATIVE SURVEY 335 



ten sea pens, more than a hundred sand covered anemones and about as 

 many smooth anemones. Among the polychaetes the best represented were 

 Oii'tnia. Lu/nhrineris, spionids and Telepsavus. The most conspicuous 

 ammals were Ophiothrix spiculata and Chaetoptents variopedatus. Total 

 numbers of species exceeded 79. Crustaceans were represented by many 

 amphipods and tanaids ; also some isopods, ostracods, cumaceans, a few 

 small shrimps and crabs, and a pinnotherid crab. Included also were a 

 pycnogonid (4) and an enteropneust (3). This fauna is similar to, but 

 more diversified than, that of the mainland shelf, in comparable depths. 

 A photograph (Plate 8) of the bottom in Emerald Bay in 17 fms (near 

 no. 207) dominated by Chaetoptents, depicts a similar area. 



2. Sta. 3045 (no. 250), in 42-43 fms. Biological dredge took mud, 

 echinoids, ophiuroids, a holothuroid, a small squid, numerous polychaetes, 

 and many kinds of small crustaceans, especially amphipods and isopods. 

 The dredge was best suited to recover echinoderms, and least effective 

 for infaunal animals. 



3. Sta. 2436 (no. 250), in 44 fms. OPG took 1.07 cuft of oily sandy 

 mud and clay. The largest animal was a large red-ribbon nemertean ; 

 other animals included a small ceriantharian, amphipods, and many poly- 

 chaetes. The species are those characteristic of the shelf fauna. 



4. Sta. 3603 (near no. 238), in 47 fms. OPG took 0.37 cuft of green 

 shelly sand. Conspicuous were brissopsids, ophiuroids and many other 

 animals. Animals other than those shown on the chart include coelen- 

 terates with a small sea pen, smooth and sand-covered burrowing anemo- 

 nes ; a small Glottidia albida, two small sipunculids; crustaceans with 84 

 amphipods, 36 cumaceans, 5 anthurid isopods, 2 gnathid isopods, about 

 90 ostracods, 10 tanaids, and 6 pagurids in small gastropod shells. The 

 largest specimen was Brissopsis pacifiray and the most abundant Nothria 

 stiginatis with 215 specimens, followed by Atnphiodia urtica with 126. 

 Total number of species is more than 80, and specimens more than 850. 



5. Sta. 2639 (no. 239), in 82 fms. OPG took 1.14 cuft of gray-green 

 sandy mud, with white shelly sand and fine gravel. Most conspicuous 

 were Ophiothrix spiculata, with about 25, and Chloeia pinnata with 13 

 specimens. Brown ostracods were numerous, and amphipods less abun- 

 dant. The fauna is limited in kinds of amnials and characteristic of that 

 at the outer edge of the shplf. 



6. Sta. 2347 (no. 251), in 100 fms. OPG took 0.25 cuft of gray- 

 green sandy mud with broken shells, echinoid spines and many animals. 

 The largest was Brisaster townsendi, the most conspicuous Chloeia pin- 

 nata, with 40 specimens, and crustaceans were represented by many 

 amphipods and ostracods. 



