21 



Living Spat 



Number of on Inner O 



Shell. Surfaces. Sur: 



41 28 



42 



43 5 



44 7 



45 3 



46 15 



47 4 



48 6 



49 2 



50 2 



51 17 



52 II 



53 I 



54 31 



55 H 



56 34 



57 14 



58 8 



59 



60 



61. 



62 



63 6 



64 17 



65 15 



66 63 



67 10 



68 55 



69 



70 



71 5 



72 



73 ^ 



74 15 



75 14 



76 9 



77 5 



78 II 



79 4 



80 3 



81 13 



S2 7 



