Nachdruck verboten. 

 Uebersetzungarecht vorbehalten. 



Notes on the Morphology of the Tunicata. 



By 

 Maynard M. Metcalf, Baltimore, Md. 



With plates 34 — 40 and 10 âgares in text. 



Contents. 



Introduction. 



Section I. The Intersiphonal Organs in the Tunicata. 



Section II. The Histology of the Brain and Ciliated Funnel in lasis 



cordiformis zonaria. 

 Section III. Protandry in Salpa cylindrica. 

 Section IV. The Ingestion of Follicle Cells in Lepfoclinum, Salpa 



and the Rat. 

 Section V. The Anatomy of Octacnemus pàfagoniensis. 

 Section VI. Pharyngeal and Cloacal Glands in Styela aggregata var. 



americana (?). 

 Section VII. On certain Ectodermal Evaginations and Invaginations 



in Molgula manhattensis. 

 Section VIII. Herdmania hostrichohranchus new Genus. 

 Section IX. Brief Mention of certain Points of Minor Interest. 



1) "Cell size and body size" in the Tunicata. 



2) The lens of the eye in the tadpole of Ecteinascidia turbinata. 



3) Abbreviated development in Molgula pellucida (?). 



4) The formation of the periganglionic membrane in Cyclosalpa. 



Introduction. 



The studies, the results of which are here described, were 

 undertaken with the desire of comparing the neural gland of other 

 groups of Tunicata with the peculiar gland I had found in con- 

 nection with the brain of Salpa. As such a comparative study, to 

 be valuable, must be comprehensive, I have endeavored to obtain 

 representatives of as many families as possible and have succeeded 



Zool. Jahrb. ÏUI. Abth. f. Morph. 



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