PLATE III. BorsroRDIA PULCHRA. 
1. Botsfordia pulchra, Matt. Dorsal valve a. Embryonic shell seen from 
above. Mag. +?——. Same seen from behind ce. Same seen from 
the side d. Another embryonic shell with deeper previsceral de- 
pression, and revolute margin. Mag. 7° e. Same in section fs 
Larval or nzepionie shell, inner half shaded, with embryonic shell at the 
umbo. Mag. ? g. Adolescent or neologic shell, inner half shaded 
(embryonic and larval stages included). Mag. ? h. Adult or ephe- 
bolic shell showing all the stages and the outline of the visceral cavity, 
inner half shaded. Mag. ? i. Interior of the dorsal valve showing 
median and lateral ridges, and muscle scars. Mag. ? —— k. Another 
interior, showing cardinal muscle, laterals or adjustors, and the central 
muscles. Mag. ¢. Seep. 115. 
2. Botsfordia pulchra, Matt. Ventral valve 
above. Mag. 42 
view, 
a. Embryonic shell seen from 
b. Same seen from behind c. Same, side 
d. Complete larval or neepionic shell, with embryonic shell 
at the umbo. Mag. ?7——e. Complete adolescent or nealogic shell (em- 
bryonic and larval stages included). Mag. ? f. Adult or ephebolic 
shell showing all the stages of growth and the outline of the visceral 
cavity —— g. View of the hinge in the larval or niepionic stage show- 
ing a covered pedicle groove and foramen (?). Mag. } —— i. Ventral 
valve decorticated in part, showing the place of the central muscles 
k. Interior of a ventral, showing the place of the cardinal, lateral and 
central muscles, radiating lateral ridges, hinge area, and flattened 
borders of the valve, ete. Mag. 7 All from Diy. 1, 6, 7-4, Caton’s 
Island. See p. 115. 
