MICROSCOPICAL STUDIES. 



23 



Explanations of Figs. 16 to 21. 



Salpa mucronata-democratica. 



Fig. 16. Dorsal view ; Fig. 17, ventral view ; Fig. 18, lateral view. 

 All solitary asexual form. t. test ; tn. nuclei of test ; 

 m. mouth or inhalent aperture ; ph. pharynx ; ac. 

 peripharyngeal bands ; end. endostyle ; /. languet ; br. 

 branchial septum ; n. nucleus or gastral part of alimen- 

 tary canal ; cl. cloaca ; a. exhalent aperture ; el. eleoblast ; 

 pi, remnant of placenta ; st. proliferous stolon ; g. ganglion 

 with eye seated thereon and nerves radiating. Muscular 

 bands are distinguished by brown colouring, x 30. 



Fig. 19. Posterior part of body of an adult solitary zooid, showing 

 the development of the proliferous stolon st. into a chain 

 of buds. n. nucleus. X 6. 



Fig. 20. 3 chain salps showing method of connection, emb. embryo, 

 n. nucleus. X 2J. 



Fig. 21. Diagram of a double row of 8 salps, showing plan of 

 attachment. Two connecting bars linking every two 

 individuals. 



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View of the Jersey Biological Station from the sea. 



