EXPLANATION OF PLATE XXIII. 



FIGURE 125. Crucibulum striatum, (p. 631 ;) 'natural si/.o. 

 126. The same ; side view. 

 127. Crepidula plana, (p. 650;) natural size. 

 128. C. convexa, (p. 650 ;) natural size. 

 129. C. fornicata, (p. "649;) natural size. 

 129a. The same; young specimen. 

 130. Neverita duplicate, (p. 646 ;) natural si/-,. 

 131. Lunatia immaculata, (p. 64(5 ;) natural size. 

 l;fc>. Natica pnsilla, (p. 647 ;) slightly enlarged. 

 133. Lunatia heros, (p. 646;) natural size.' 



134. The same; with the animal extended, as in crawling; dorsal view. 

 135. The same, variety triseriata, (p. ^54.;) young, natural si/c. 

 136. The same variety ; natural size, lower side. 

 (From Binney's Gonlil, drawn by E. S. Morso.) 



