Nachdrude verholen. 

 Uebersetzuiigsrccht vorbehalten. 



Oll the Connective Tissues and Body Cavities 

 of the Nemerteans, with Notes on Classification. 



By 



Thos. H. Montgomery jr., Ph. D. 



With Plates 1—4. 



Contents. 



Introduction. 



Material and technique. 



A. The connective tissues: 



I. Carinella annulata. VI. Äniphiporus virescens. 



n. Cerebratulus lacteus. VII. Tetrastemma vermiculum. 



III. Lineus gesserensis. VIII. T. catenulatum. 



IV. L. lacteus. IX. Stichostemma eilhardi. 



V. Amphiporus glutinosus. X. Comparisons and conclusions. 



B. Notes on classification. 

 Literature cited. 

 Explanation of plates. 



Introduction. 



The present paper deals with the histology of the connective 

 tissue elements, and with the structure of the perivisceral body 

 cavities, in Carinella annulata Montag., Cerebratulus lacteus Verr., 

 Lineus gesserensis (0. F. Müll.), L. lacteus (Grube), Amphiporus 

 glutinosus Verr., A. virescens Verr., Tetrastemma vermiculum (Stimps.), 

 T. catenulatum (Verr.), and Stichostemma eilhardi Montg. Incident- 

 ally, the origin of the gonads and genital cells is also discussed. 

 And in an appendix, certain points in the nomenclature and classi- 

 fication of the Metanemerteans are considered. 



ZooL Jahrb. X. Abth. f. ilorph. 1 



