No. 8. — -Some Medusae and Siphonophorae from the Western Atlantic. 



By Henry B. Bigelow. 



CONTENTS. 



Introduction 



List of species 



Anthomedusae 



Leptomedusae 



Trachoniedusae 



Narcomedusae 



Scyphomedusae 



Siphonophorae 



Geographical distribution 



Table of stations 



BibUography 



Explanation of plates 



Page. 

 365 

 366 

 367 



383 

 387 

 390 

 399 

 402 

 428 

 4.35 

 436 



INTRODUCTION. 



The Medusae and Siphonophorae described here were collected 

 by the United States Coast Survey Steamer Bache, January to March, 

 1914, and by the United States Fisheries Schooner Grampus, off 

 Chesapeake Bay, in August, 1916. 



The itinerary of the cruise of the Bache has been published 

 (1917a); but for convenience, the stations at which Medusae or 

 Siphonophorae were taken are listed (p. 435). 



The collections were made, and the material preserved, by Mr. 

 W. W. Welsh, of the Bureau of Fisheries, who, in spite of stormy 

 weather, handled this fragile material successfully. 



The synonymies of the better known species are, as a rule, omitted, 

 full references to the earlier literature on the Medusae having been 

 given by Mayer (1910); on the Siphonophorae by me (1911b). 



