28 



THE INORGAISriC COXSTITUENTS OF MARINE INVERTEBRATES. 

 Reduced analyses of starfishes — Continued. 



SiO, 



(Al.Te)203 

 MgCO,.... 

 CaCO, 



Ca^PA-- 

 CaSO^ 



15 



0.24 



.23 



13.02 



85.08 



Trace. 



1.43 



100.00 



16 



1.02 



1.88 



10.69 



86.41 



Trace. 



Trace. 



100.00 



17 



0.00 



2.84 



8.91 



88.25 



Trace. 



Trace. 



18 



19 



0.82 



2.19 



9.60 



87.39 



Trace. 



Trace. 



0.29 



.33 



10.11 



87.93 



Trace. 



1.34 



100.00 100.00 



100.00 



20 



2.06 



11.04 



13.56 



71.28 



Trace. 



2.06 



21 



1.06 



1.86 



13.52 



81.82 



Trace. 



1.74 



100.00 100.00 



23 



SiOj 0.06 Trace. 



(Al.Fe)^ , 3.99 1.32 



MgCOa ! 13.76 11.16 



CaCOs 80.04 87.52 



CasPjOg Trace. Trace. 



CaSO^ 2.15 Trace. 



100.00 I 100.00 



24 



1.05 



7.66 

 10.51 

 80.78 



Trace. 



Trace. 



100.00 



25 



26 



0.41 

 2.90 

 8.29 

 85.99 

 Trace. 

 2.41 



0.71 



2.44 



12.05 



82.51 



Trace. 



2.29 



27 



0.15 



.92 



14.35 



82.27 



Trace. 



2.31 



28 



0.70 

 2.64 

 9.32 

 85.63 

 Trace. 

 1.71 



29 



0.00 



3.49 



11.22 



85.29 



Trace. 



Trace. 



100.00 100.00 ' 100.00 100.00 ; loo.oo 



In the following table the analyses are arranged in tlie order of ascending magnesium 

 carbonate, like those of the crinoids and sea urchins. 



Magnesium carbonate in starfishes. 



Asterias vulgaris 



Asterias forbesi 



Marthasterias glacialis. . . 



Ctenodiscus crispatus 



Pontaster tenuispiuus. . . 



Urasterias linckii 



Plutonaster agaasizii 



Linclda laevigata 



-Vsterias acervata 



Benthopecten spinosus. . 

 Astropecten americanus. 



I^ptasterias compta 



Asterias tanneri 



Ctenodiscus australis 



Odontaster hispidus. ... 



Orthasterias tanneri 



Ctenodiscus procurator. . , 

 Coscinasterias calamaria. 



Asterina miniata , 



Asterina pectinifera 



Luidia clathrata 



Asterina minuta 



Astropecten articulatus.. 



Acanthaster planci 



Pharia pyramidata 



Phataria bifascialis 



Oreaster occidentalis 



Linclda guildingii 



Culcita novaeguineae 



Locality. 



Latitude. 



Eastport 



Vineyard Sound 



Azores 



Newfoundland 



Station 2205 



Nova Scotia 



Marthas Vineyard 



East Indies 



West Bank 



Station 2568 



Marthas Vineyard 



Station 2250." 



Station 2309 



Patagofiia 



Marthas Vineyard 



Station 2307 



Off Chile 



New Zealand 



California 



Japan 



Charleston 



Tobago 



Florida 



Palmyra Island 



Cape San Lucas 



Cape San Lucas 



San Jose Island 



Tobago 



East Indies 



44°55'N. 



(?) 



38° 35' N. 

 43°08'N. 

 39° 29' N. 

 44° 32' N. 



(?) 



(?) 



(?) 



39° 15' N. 



(?) 



40° 17' N. 

 35° 43' N. 



(?) 



(?) 



35°42'N. 

 53°01'S.. 



(?) 



36° 38' N. 

 43° N 



47' N. 



25' N. 



Depth. 



32' 

 11=^ 



(?) 



5° 49' N. 

 22° 52' N 

 22° 52' N 

 25° N 



11°25"'N Shoal 



(?) (?) 



Meters. 



(?) 



(?) 



(?) 

 93 



2,456 

 403 

 584 



(?) 



(?) 



3.249 



(?) 

 86 

 102 



(?) 



245 

 79 



675 

 (?) 

 (?) 

 (?) 

 (?) 

 Shoal.... 

 (?) 

 (?) 

 (?) 

 (?) 

 (?) 



Temper- 

 ature. 



(?) 

 (?) 

 (?) 



1.1 



(?) 

 (?) 

 6.6 



(?) 

 (?) 

 2.7 



(?) 

 10.8 



(?) 



(?) 

 11.1 

 14.5 

 8.3 



(?) 



(?) 



(?) 



(?) 



(?) 

 (?) 



(?) 

 (?) 

 (?) 



(?) 



28 



28 



ilgCOj 



Per cent. 



7.79 



8.24 



8.29 



8.78 



8.86 



8.91 



9.09 



9.32 



9.60 



9.88 



10.11 



10.27 



10.28 



10.51 



10.58 



10.69 



11.16 



11.22 



11.24 



12.05 



12.13 



12. 53 



13.02 



13.33 



13.52 



13.56 



13.76 



14.31 



14.35 



Here again w^e meet the same coordination of temperature with content of magnesium 

 carbonate that was noted in the series of crinoids, sea urchins, and alcyonarians. As a general 

 rule the species from cold r^ions are lowest in magnesia; those from warm regions are higher. 

 The regularity, however, is not absolute, and the variations from it may be real, or perhaps may 



