Bull. U. S. F. C 1895. The American Lobster. 
Plate 42. 
F. H. Herrick ad nat. del. 
Fig 162 
Fig. 163 
Fig. 155 
Fig. 156 
Fig. 159 
Fig. 157 
Fig. 160 
METAMORPHOSIS OF GERMINAL VESICLE, SPICULES OF GASTROLITH, AND OTHER STRUCTURES 
