MONOGRAPH OF THE EXISTING CRINOIDS. 



299 



Hathrometra tenella. — Off Marthas Vineyard, Massachusetts (lat. 39° 56' N., 

 long. 69° 24' W.) ; depth, 329 meters; temperature, about 7.8° C. {Fish Hawk 

 Station 1033). 



Psathyrometra fragilis. — Yezo Strait, Japan (lat. 44° 05' N., long. 145° 30' 

 E) ; depth, 540-959 meters; temperature, 1.61° C. {Albatross Station 5032). 



Pentametrocnnus japonicus. — Southern Japan, 34.5 miles off Omai Saki Light 

 (lat. 34° 04' 20" N., long. 137° 57' 30" E.) ; depth, 1,123 meters; temperature, 

 3.39° C. {Albatross Station .5083). 



Hypalocrinus narcsianus. — Philippine Islands, 3.4 miles off Cagayan Island, 

 Jolo Sea (lat. 9° 37' 05" N., long. 121° 12' 37" E.) ; depth, 612 meters; temper 

 ature, 10.22° C. {Albatross Station 5424). 



Endoxocrinus parrc. — Off Habana, Cuba. 



Isocrinus decorus. — Off Habana, Cuba. 



Bythocrlnus rohustus. — (iulf of Mexico, southeast of Pensacola (lat. 28° 38' 

 30" N., long. 85° 52' 30" W.) ; depth, 255 meters; no temperature record. 



Ptilocrinus pinnatus.—OS the Queen Charlotte Islands, British Colvmibia 

 (lat. 52° 39' 30" N., long. 132° 38' 00" W.) ; depth, 2,858 meters; temperature, 

 1.83° C. {Albatross Station 3342). 



In the following table the actual analyses are given. 



The sjTnbol " KoO," represents the sum of ferric oxide and alumina. 



The " loss on ignition " covers carbon dioxide, water, and organic matter, the 

 last being often very high. 



Table of actual analyses. 



Capillaster multiradiata 



Zygometra microdiscus 



Catoptoivetra ophium 



Heterometra quinduplicava . . . 



Tropiometra picta 



Ptilometra miillen 



Parametra granulata 



Perissometra patula 



Chondrometra rugosa 



CrinomHra concinna 



Promichocrinus herguelensis . . . 



Floromctra asperrima 



Anthometra adriani 



Hathrometra tenella 



Psathyrometra fragilis 



PentaTnetrocrinus japonicus.. . 



Hypalocrinus narcsianus 



Endoxocrinus parrse (arms) 



Endoxocrinus parrs (column) 



Isocrinus decorus (arms) 



Isocrinus decorus (column) 



Bythocrinus rohustus 



Ptilocrinus pinnatus 



0.16 

 .04 

 .04 

 .15 

 .02 

 .17 

 .40 

 .12 

 .05 

 .04 

 .02 

 .04 

 .23 



3.17 

 1.11 

 .37 

 .07 

 .15 

 .04 

 .09 

 .03 

 .40 

 1.64 



0.62 

 .48 

 .79 

 .19 

 .35 

 .19 

 .50 

 .63 

 .23 

 .25 

 .45 

 .39 

 .37 

 .31 



1.01 

 .71 

 .09 

 .26 

 .20 

 .19 

 .07 

 .31 



1.07 



MgO 



4.77 

 4.92 

 4.64 

 5.13 

 4.51 

 4.17 

 4.48 

 4.94 

 3.99 

 4.75 

 3.02 

 3.60 

 3.27 

 2.49 

 3.12 

 3.76 

 4.44 

 5.04 

 5.09 

 4.70 

 5.08 

 4.56 

 3.08 



needed to 



satisfy 

 the bases. 



35.19 

 34.47 

 36.81 

 39.17 

 36.05 

 34.90 

 37.77 

 37.51 

 37.95 

 38.00 

 35.18 

 35.48 

 37.08 

 22.73 

 31.37 

 34.01 

 41.27 

 39.65 

 41.29 

 38.71 

 40.40 

 41.93 

 35.23 



