PART II 

 COELENTERATA 



The Coelenterata presented in this Bulletin of the Vanderbilt 

 Marine Museum, seventh in the scientific series, are part of the 

 collections obtained by Mr. William K. Vanderbilt in a series of 

 cruises in his yachts "Ara" and "Alva," during the years 1928 to 

 1935. These explorations included the World Cruise of the "Ara," 

 1928-1929, the World Cruise of the "Alva," 1931-1932, and the 

 "Alva" South American Cruise of 1935. Although numerically 

 small, the collection is surprisingly rich in the number of new and 

 rare species it contains, and in the related extension of knowledge 

 of their geographical and bathymetrical distribution and of their 

 anatomy, as presented in the systematic discussion. 



Hydroida 



The Hydroida are represented by only one species, Coryden- 

 drium splendidu7n Boone, from Oahu, Hawaii, a new Gymnoblas- 

 tea, possessing stages of development seldom found. These were 

 collected by the ''Ara" World Cruise, 1928-1929. 



Leptomedusae 



The Leptomedusae are represented by two exceptionally 

 large specimens of the exceedingly rare Aequorea coerulescens 

 (Brandt) which were collected in Valparaiso, Chile, by the "Alva" 

 South American Cruise of 1935. 



Siphonophorae 



The Siphonophorae obtained by the "Alva" World Cruise of 

 1931-32 consist of eight species, the record of each of which 

 contributes something of value to our knowledge of this group of 

 miraculously beautiful ocean dwellers. 



The "Alva's" deep-sea station in the Atlantic Ocean, off Fuerte 

 Ventura, Puerto Cabras, Canary Islands, depth 250 fathoms, 

 yielded four species, namely: A series of specimens of Doromasia, 

 picta Chun, of especial interest in being from Chun's type locality ; 



