ECHINODERMATA OF NEW ENGLAND. 27 



ing. Small finger-like projections on the bell margin 

 wanting. Color of larva like that of adult. 



Sarsia mirabilis. Larva resembles adult. 



Dipurena strangulala. Larva not studied. 



Ectopleura ochracea. Larva like adult. 



Zandeagemmosa. Bell ovate without apical prominence. 

 Tubes four. Tentacles two, each with numerous lateral 

 branches. In some young forms the two additional bud- 

 ding tentacles are seen. Bell with clusters of thread cells 

 as in adult. 



Tarris episcopalis. Larva with characters of adult. 



Dt/smorphosafulgurans. Larva not observed. 



StauropJiora laciniala. Larva like adult. 



Calicopsis typa. Larva like adult. 



Modeeria multitentaculata. Larva not observed . 



JVemopsis Hachei. Larva has few tentacles in each 

 cluster. Dendritic labial branches less complicated. 



Lizzia octopunctata. Larval forms of Lizzia in all stages 

 of growth found on the sides of the proboscis. The young 

 can be studied from these buds. 1. Youngest bud has 

 single tentacle at each end of the radial tubes and single 

 intermediary tentacle. 2. The next oldest has a cluster 

 of three tentacles at end of each tube and three interme- 

 diary in cluster. 3. Oldest with five tentacles at the end 

 of each tube with three in intermediary clusters. The 

 stages 2 and 3 are free, and have rudiments of the second 

 generation of buds on the outside of proboscis. The very 

 immature buds also found in younger stages have half 

 formed probosces. 



A. II. 



Willia ornata. Larva with four tentacles one at each 

 end of the four unbranched tubes. Alternating with these 

 on the bell walls a small cluster of nematocysts. Apical 

 tube visible. 



