



TABLE OF CONTENTS. 





Page 



INTRODUCTION 5-15 



SYSTEMATIC ACCOUNT OF THE 



GENERA AND SPECIES . . 16-161 



Hyalonematidae 



Hyalonema 16 



H. ovuliferum 16 



II. pedunculatum (PL 3, Figs. 1-6) 19 

 H. bianchoratum (PI. 2, Figs. 



1-11) 22 



H. sp. div. (PL 2, Figs. 12-16) . 25 



H. pateriferum (PL 1, Figs. 1-13) 28 



EUPLECTELLIDAE 



EuPLECTELLA 33 



F. sp. (PL 4, Fig. 4) . . . . 33 



Regadrella 35 



R. sp. (PL 9, Fig. 9) .... 35 



R. delicata (PL 3, Figs. 7, 8 ; PL 4, 



Figs. 2, 11) 36 



Caulophacus 43 



C. .schulzei (PL 4, Figs. 1, 3, 5-10; 



PL 5, Figs. 1-6, 8-10) ... 43 



C. sp. (PL 5, Fig. 7) 50 



RoSSELLIDAE 



Bathydorus 51 



B. Levis spinosus (PI . 5, Figs. 11-13 ; 



PL 6, Figs. 1, 2) 51 



Staurocalyptus 54 



S. sp. (PL 6, Figs. 4-10) . . .54 



- 



Farreidae 



Farrea 57 



F. occa olaviformis (PL 6, Figs. 3, 



11-14; PL 1, Figs. 1-3, 6) . . 57 



F. mexicana (PL 7, Figs. 4, 5, 7, 8, 



10, 11) 60 



F. sp 62 



Page 



EURETIDAE 



EURETE 62 



F. erectum 62 



F. erectum tubuliferum (PL7, Figs. 

 9,12; PL 8, Figs. 1-3, 6) . . 63 



F. erectum mucronatum (PL 8, 

 Fig. 7) ........ 68 



F. erectum gracile (PL 8, Figs. 4, 

 5, 8, 9; PL 9, Figs. 1, 3, 5) . 69 



F. sp 72 



Meltttionidae 



Aphrocallistes ...... 73 



A. vastus 73 



coscinoporidae 



Chonelasma 74 



C. calyx (PL 10, Fig. 5) 



74 



Batiiyxipiius 75 



B. sp. (PL 10, Fig. 2) . 

 Tretodictyidae 



Hexactixella . . . . 



rr ^ 



a 



II labyr'mthica (PL 10, Figs. 6, 7 ; 

 PL 11, Figs. 1-7) ..... 77 



II. ventilabrum 



82 



//. tubulosa 83 



SCLEROTHAMNOPSIS 



S. eompressa (PL 9, Figs. 2, 4, 6-S, 

 10, 11 ; PL 10, Figs. 1, 3) . . 



84 



C 



84 



rn 



riJENEIDAE 



rp 



Thenea 



88 



T. fenestrata (PL 13, Figs. 2-4, 6, 



7,9) 



88 



T. echinata (PL 12, Figs. 1-9) . 91 

 T. lamelliformis (PL 12, 



Figs. 



10-13 ; PL 13, Fig. 1) . . . 



T. pyriformis (PL 13, Figs. 5, 8, 

 10,11) 



95 



98 



