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HANDBOOK OF INVEKTEBEATB ZOOLOGY. 



Pig. 65, b- 



Fig. 65. — Dorsal view of a larva a little older, slightly flattened by 

 pressure. (Drawn from nature by W. K. Brooks.) 



a. Anterior end. b. Posterior end. c, c. Post-oral arms, a' a'. Pre- 

 oral arms, d. Spicules of side of body. e. Ventral transverse spicule, 

 seen through body. /. Spicule of pre-oral arm. g. Spicule of post-oral 

 arm. i. Intestine, pushed to one side by pressure, k. Point where 

 lateral arm is to be developed. I. Rudiment of a dorsal transverse 

 spicule, m. Mouth, m, e. Mesoderm. ce. CEsophagus. p. Spicular 

 skeleton at posterior end of body. s. Stomach, w. Water tubes. 



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