4 THE INOKGANIC CONSTITUENTS OF MARINE INVERTEBRATES. 



gation. As the sponges are of minor importance in relation to the marine sediments, we have 

 followed our usual course, and so have obtained results which are of some significance, even if 

 they are not all that might be desired. Twenty sponges have been examined, more or less 

 completely, as follows; 



1. Eupleclclla speciosa Quoy and Gaimard ('' Venus 's flower basket"). Pliilippine Islands. 



2. BalUydonis nnrifer F. E. Sohulze. Galapagos Islands, Albatross station 2818; latitude, 0° 29' S. ; longitude, 

 89° 54' 30" W. : depth of water, 617.4 meters; bottom temperature, 9.9° C. 



3. Halvhondria pani'-ea Johnston. Alaska. 



4. Subcnlcs subcrca Johnston. Un^a Island and Popot Strait, Alaska. 



5. Tcthya grarala Hyatt. Buzzards Bay, Mass. 



G. Pluionema grayiKent. Off southwest coast of Ireland, at depth of 1,098 meters. 



7. Geodiame^otrise7m\ax. pac^niw Lendenfeld. Off southern California, .4 iiafross station 2909; latitude, 32° 22' 

 .\. ; longitude, 120° 08' 33" W. ; depth 377 meters: bottom temperature, 7.3° C. 



8, rhakcUia yrandis Verrill. Browns Bank, northeast of Cape Cod, between latitudes 40° 30' and 42° 08' N. and 

 longitudes 66° W, ; depth, 549 metei-s. 



!). Chondroclddia alaskcnsis Lambe, On beach at Unala.ska, .^la^ka. 



10. Gelliodcs yrandis Verrill. Gulf of Maine. 



11. E-tperiopsis qiiatsinocnsis Lambe. .\ttu Island, .\laska. 



12. Clialinq arbusnila Verrill, Outer Island, Conn. 



13. Spinosella snroria var. crispa Duchassaing and Michelotti. Harrington .Sound. Bermuda, 



14. Euspongia oj/icinalis luhulifcra var. turrita Hyatt. Harrington Sound, Bermuda. 



15. Hircinia campana var. turrita Hyatt. Bermuda. 



16. Eusponyia officinalis var. rotunda Hyatt, Nassau, Bahama Islands. 



17. Hippospongia equina var. meandriformu Duchassaing and Michelotti, Nassau, Bahamas. 



18. Hippospongia agaricina var. dura Hyatt. (>ff Duck Key, Fla., at depth of 4.6 meters. 



19. Hippospongia ranictilala var. gossypina Duchassaing and Michelotti, Off Rock Island, Fla., at depth of 7.3 

 meters. 



20. Aplysina lursula Hyatt. Off St. Thomas, \irgin Islands; depth of water, 37 to 42 meters. 



21. GVmiha c)7ia(a, Fabricius. Woods Hole, Mass. AVeight of sample only 0.0982 gram. 



22. Lcucilla caricri, var. homoraphis (Polejaeff). Off Culebra Island, Porto Rico, Fish Hawk station 6090; bottom 

 temperature, 26° C, Weight of sample, 0,1422 gram, 



.\nalyses 21 and 22 by R. M. Kamm. 



The analyses were made by our usual methods; Nos. 21 and 22 were made on insufficient material and are therefore 

 incomplete. 



Analyses of sponges. 



SiO.2 i 88.56 



( Al,Fe)203 ' .32 



•MgO 1 .00 



CaO : .22 



P..O5 i .00 



SO3 .00 



ignition ' 10.26 



99.36 



76.33 



1.05 



.48 



2.78 



.00 



Trace. 



18.60 



74.52 



6.19 



1.43 



2.33 



.17 



.08 



12.11 



99.24 



96.83 



.49 



.39 



22.21 



.48 



.40 



23.02 



Trace. 

 .02 

 27.05 



Trace. 

 .21 

 31.73 



60.70 



2.30 



.23 



.51 



.46 



(?) 

 35.84 



98.11 97.57 98.57 97.78 100.04 



SiO., oo.lHi 



(Al,I''e).,03 1.64 



MgO 58 



CaO 1.28 



PjO., 3] 



SOa >?) 



Ignition 41 .97 



93.79 98.59 



98.82 



