Male Reproductive Organs of Decapoda, With Special 

 Reference to Puget Sound Forms 



Nathan Fasten, 

 University of Washington, Seattle. 



CONTENTS 



1. Introductory Remarks 285 



2. Male Reproductive Organs of Brachyura 286 



3. Male Reproductive Organs of Anomura 286 



4. Histology of the Vasa Deferentia of Decapoda 288 



A. The Vasa Deferentia of Anomura 288 



B. The Vasa Deferentia of Brachyura 290 



C. The Vasa Deferentia of Macrura 291 



5. Discussion 293 



0. Concluding Remarks 294 



7. Bibliography 295 



8. Description of Plates 297 



1, INTRODUCTORY REMARKS 



In a previous publication (Fasten, 1915), the author described the 

 male reproductive organs of the following Brachyura which occur in Puget 

 Sound: Cancer magister, Cancer productus, Hyas lyratus, Oregonia gra- 

 cilis, Hemigrapsus nudus, Telmessus cheiragonus, Epialtus productus and 

 Pugettia gracilis. During the summer of 1916, while the author was res- 

 ident at the Puget Sound Marine Station, numerous other Decapoda were 

 collected for investigation, including the Brachyura Cancer gracilis. Cancer 

 oregonensis, Scyra acutifron^ and Lophopanopeus bellus, as well as the 

 free living Anomura Lopholithodes mandtii, Haplogaster mortensii, Rhino- 

 lithodes rt'ossiiessenskii and Petrolisthes eriomerus. Also, the writer had 

 on hand for comparative study, preserved material of the male reproduc- 

 tive organs from the Puget Sound hermit crab (Pagurus setosus), the Pa- 

 cific coast crayfish (Astacus leniusctilus) , the Atlantic coast lobster (Ho- 

 marus americanus), and the spiny lobster of the California coast (Paniilirus 

 interruptus) . The material from Pagurus setosus, Astacus leniusculus and 

 Homarus americanus was collected by the author himself, while that from 

 Panulirus interruptus was obtained through the kindness of Dr. Bennet M. 

 Allen of the University of Kansas. 



(285) 



