PLATE IV. 
Page. 
I'ig. 
1. 
Spiroplnjton canda-pJiasiani, L. Gr. cle Koninck — Natural size 
49 
Tig. 
2. 
BeUeroplion JuJcesii, L. G. de Koninck — Side view, natural size 
33 
Fig. 
2a. 
The same, view of the mouth 
33 
Fig. 
3. 
Bentalium tetiuissimim, Jj. G. de J^oninck — Natural size 
93 
Fig. 
4. 
Belle7’oplion convolutus, L. G. de Koninck — View of the mouth, natural size... 
94 
Fig. 
4fl. 
The same, side view ... 
94 
Fig. 
5. 
Mw'cliisonia tw'7'is, L. G. de Koninck — Eestored from several fragments, 
natural size 
95 
Fig. 
G. 
M7i7’chiso7iin g7'a7iife7'a, L. G. de Koninck — Natural size 
9G 
Fig. 
G«. 
The same, enlarged ... 
9G 
Fig. 
7. 
Bleu7'oto77ia7'ia suljco7iica,Jj. G. — Natural size 
9G 
Fig. 
7a. 
The same, enlarged ... 
9G 
Fig. 
8. 
Bimnplialus Bigshyi, L. G. de Koninck — Side view, natural size 
98 
Fig. 
8fl. 
A smaller specimen, seen from above 
98 
Fig. 
9. 
Loxone77ia anglicim, D’Orb. — Figure taken from several specimens, natural size 
98 
Fig. 
10. 
Loxo7ie77ia aTitigmm, Munster — Natural size 
99 
Fig. 
lp«. 
Portion of the same, enlarged 
99 
Fig. 11. 
Niso ? I)a7'winii, L. G. de Koninck — Side view, small specimen, natural size... 
101 
Fig. 
11a. 
The same, seen from the base 
101 
Fig. 
lU. 
Portion of an adult individual, elevation ... 
101 
Fig. 
11a. 
Longitudinal section of an adult individual, showing the prolongation of the 
umbilicus ... 
101 
Fig. 
12. 
Mifcliellia st7'iaiuJa, L. G. de Koninck — Specimen of natural size, seen from 
the oral side 
102 
Fig. 
12ff. 
The same, enlarged ... 
102 
Fig. 
13. 
Gij7'toceras textile, L. G. de Koninck — Side view of fragment, exposing to view 
apart of the siphon 
104 
Fig. 
13a. 
The same, seen transversely 
lOi 
Fig. 
13&. 
Sculpture of the same, magnified ... 
104 
Fig. 
14. 
Ortlioee7’as suhdi77udiatm77, L. G. de Koninck — Longitudinal section, natural 
size... 
105 
Fig. 
14a. 
The same, transverse section 
105 
Fig. 
15. 
Oo7iiatites Woodsii, L. G. de Koninck — Specimen of natural size, side view ... 
103 
Fig. 
15a. 
The same, view of the mouth 
103 
Fig. 
IG. 
Biscma Alleglia7iia, Hall — Ventral valve of natural size, of which the left half 
has been drawn from the right half, the only portion received by the Eev. 
W. P, Clarke 
G1 
