76 
MORGAN. 
PEADE A: 
All larvae on Pl. I were drawn to the same scale. Camera outlines. Zeiss, eyepiece 2. Objective 
AA, with lower lens removed. Drawn from living specimen (except 12). 
Fic. 1. Youngest Tornaria stage observed. (Stage I.) Length 1% mm. 
Side view. 
Fic. 2. Older stage than last. (Stage II.) Side view (more of dorsal surface 
seen). 
Fic. 3. Largest stage of free swimming Tornaria. Length 4% mm. Side 
view. (Stage III.) 
Fic. 4. Larva decreasing in size. Side view. (Stage IV.) 
Fic. 5. Transition stage between Tornaria and young worm. Side view. 
(Stage V.) 
Fic. 6. Smallest size reached by older larva, Still free swimming. Dorsal 
view. (Stage VI.) 
Fic. 7. Young worm with two gill-slits. Taken from sand. Dorsal view. 
(Stage VII.) 
Fic. 12. Bimini Tornaria. Side view. 
