206 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [500] 
RADIATES. 
Echinoderms. 
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Strongylocentrotus Drébachi- | A. apemIcola 22 ee once fe ras 326 
ensis fee: 2, 5 SE 496 | Cribrella sanguinolenta...... 496 
Asterias vulgaris.-........-. 496 | Ophiopholis aculeata ........ 496 
Acalephs. 
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Clytia Johnstoni...........- 408 | Sertularia argentea ......... 408 
SEPINLErMed1a..\- «(eee oe 408) (SJcupressina: ; . .. >. eeene 408 
Orthopyxis caliculata.......- 408 | Hydralimania faleata........ 408 
Platypyxis cylindrica.....-.. 408 | Plumularia, species ......... 407 
Campanularia volubilis...... 408 | Antennularia antennina ..... 497 
G.flexudga.c- 7)... eee ,--- 327 | Eudendrium ramosum....... 408 
Obelia-eenteulata 2. ..-.--.-- 406 |, He OUSpaRia. . vt coe ee 408 
Opmiehorgmian coe oe < omine soe 407 | Pennaria tiarella......... Sa ene 
OmMiabellaiae. eee nee ee 497 | Thamnocnidia tenella... ...-- 407 
OF dia phanaiecn: ae ae sn 327 | Hydractinia polyclina .....-.- 328 
Polyps 
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Aleyonium carneum......... 497 | Edwardsia lineata........... 497 
Metridium marginatum...... 329 | Astrangia Dane ...../2.2022 408 
PROTOZOA. 
Sponges. 
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Ghalina ieculataic...-- .<a.--< £97.) Poly mastva(®)tce s-: ece eee 497 
Tedania, two species .......- 498:\' Grantiaeliata..c 42-2. eee 330 
ihenieria, Species <. :-...-- =. 330 | Leucosolenia botryoides (?).. 391 
Cliona sulphurea......-...-. 42 
IV. 4. FAUNA OF THE SANDY AND GRAVELLY BOTTOMS OFF THE 
OPEN COAST. 
The bottom off the southern shores of Nantucket and Martha’s Vine- 
yard is sandy or gravelly over large areas, from low-water mark down 
to 25 fathoms or more. Tracts of similar bottom occur off Cuttyhunk 
Island and farther west. In many of these places, especially in the 
shallower waters, near shore, the material of the bottom is nearly pure 
siliceous sand, varying in fineness from coarse gravel to the finest sand, 
and as these sands are generally loose and moved by the storm-waves, 
in shallow water, their inhabitants are but few. In deeper water, at 
depths of 20 to 25 fathoms or more, the material is usually a very fine 
sand, often firmly compacted, and not infrequently mixed with more or 
less fine mud. Such localities are favorable for a much greater variety 
s 
