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TABLE OF CONTENTS. 



Page 



POECILLASTRA 101 



P. tricornis (PL 13, Figs. 12-14; 

 PL 14, Figs. 1-8) 101 



P. cribraria (PL 14, Figs. 9-12 ; PL 



15, Figs. 1-4; PL 16, Figs. 1, 3) 105 



Stelletidae 



Penares Ill 



P. foliaformis (PL 15, Figs. 5-11) 111 



polymastidae 



Polymastia 115 



P. maeandria (PL 16, Figs. 2, 4-6; 

 PL 21, Fig. 1) 115 



Haplosclerldae 



Petrosia 118 



P. variabilis crass a (PL 17, Figs. 



6, 9, 12; PL 21, Figs. 2, 3) . 118 



P. similis densissima (PL 17, Figs. 



7, 10 ; PL 21, Figs. 4, 5) . . 121 



Paciiychalina 124 



P. acapulcensis (PL 16, Figs. 7, 8 ; 

 PL 17, Figs. 1-5, 13) ... . 124 



OCEANAPIA 127 



0. bacilli/era (PL 17, Fig. 8; PL 

 18, Figs. 2-4) 128 



Gellius 130 



G. perforates (PL 17, Fig. 11 ; PL 

 18, Fig. 1 ; PL 21, Fig. 6 ; PL 

 22, Fig. 1) 130 



Page 



POECILOSCLERIDAE 



Tylodesma 



1 



35 



T. alba (PL 18, Figs. 5-7; PL 22, 

 Figs. 2, 3) 136 



T. vestibularis (PL 18, Figs. 8, 9 ; 

 PL 19, Fig. 1; PL 22, Fig. 4; 

 PL 23, Figs. 1-3) 139 



Iopiion 143 



I. chelifer ostia-magna (PL 20, 

 Figs. 2, 4, 10, 11 ; PL 24, Fig. 1) 



L lamella (PL 20, Figs. 3, 7-9, 12, 

 13 ; PL 24, Figs. 2-4) .... 



J. lamella indivisus (PL 20, Figs. 



143 



146 



14-16) 



149 



/. indebitatus (PL 19, Fig. 6 ; PL 



20, Figs. 1, 5, 6 ; PL 23, Fig. 4) 151 



Axtnellidae 



Phakellta 155 



P. lamelligera (PL 18, Fig. 10 ; PL 

 19, Figs. 2, 3 ; PL 25, Figs. 1, 

 3, 4) . 



155 



AULETTA 158 



A, dendrophora (PL 19, Figs. 4, 5, 7; 

 PL 25, Fig. 2) 158 



LITEEATUEE CITED . . . .162-164 





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