MOLLTJSKS. 

 4. CEPHALOPODS. 



34. Xdulilax pompilius I.inn^. Minrlanao, Philippino Islands. 



35. Argotinuta argn lanno; the paper nautilus. I[is;h seas, Pacific Ocean. 



36. Sepia sp.; cuttlefish bone. Port Tataan, Tawi, Tawi group, Philippine Islands. 



Analyses of ci'phnlopods. 



41 



SiOj 



(Al,Fe)A 



MgO 



CaO 



PA 



Ignition 



CO2 needed 



Organic matter, etc 



34 



0. IS 



.14 



.07 



52.44 



Trace. 



46.65 



99. 48 



41.28 



5.37 



35 



0.08 



.12 



2.58 



46.78 



Trace. 



49.16 



98.72 



42.30 



6.86 



36 



0.00 



.06 



.66 



47.42 



Trace. 



51.63 



99.77 



38.65 



2.98 



Reduced analyses of cephalopoda . 



For comparison a series of four analyses of cephalopod shells by O. Butschli '" is worth 

 citing in full. They are as follows : 



1. Nautilus pompilius. 2. Argonnuta argo . 3. Spirula peronii. 4. Sepia officiiialis . 



Awdysts ofcephalopods by Butschli. 



CaCOs 



MgCO, 



Phosphate 



CaS0,.2H/),... 



H.p 



Organic matter. 

 Sand 



94.75 

 .16 



.20 

 2.62 

 2.03 



85. 07 

 5.08 

 3.06 

 1.75 

 2.92 

 2.43 



99.76 



100.31 



90.43 



.46 



3.20 



.48 



2.17 



2.32 



.33 



99.39 



87.36 



.21 



2.26 



.78 



4.89 



5.36 



100.86 



Exactly what is meant by "phosphate" is not clear. Assuming it to mean calcium phos- 

 phate and reducing the analyses to uniformity ^vith ours, they take the following form: 



Biitschli'.'i analyses reduced. 



« Biitschli, O., K.GeseU.Wiss. Gottingen Abh., No. 3, 1908. Butschli also gives analyses of three other molluslcs, Pinna japonica, PaUlla 

 vui^ata, and Purpura lapillits, but they show no unusual features. 



