DEVELOPMENT OF THE OALTFOKNIAN HAG-FISH. 269 



On the Development of the Californian Hag-fish, 

 Bdellostoma Stouti, Lockington. 



By 



Baslifoi'd Dean, Ph.D., 



Columbia College, N.Y. 



(Preliminary Note.) 



With Plate 17. 



Dr. Howard Ayers, in a lecture before the Wood^s Holl 

 Biological Laboratory/ has given a detailed account of the 

 occurrence of the Pacific Hag-fish, Bdellostoma Dombeyi 

 (= Stouti), in the Bay of Monterey. Its great abundance in 

 this region gave promise of material for the study of the 

 development of a Myxinoid ; or, at all events, the chances to 

 obtain these valuable stages seemed far more favorable here 

 than in the European localities, mainly in the North Sea, 

 where the eggs of Myxine had long been sought. Among the 

 zoologists who endeavoured to secure hag-fish embryos in 

 California Professor G. C. Price, of the Lelaud Stanford, Junior, 

 University, was the first to succeed, and he has already pub- 

 lished two accounts of his studies.- During the past summer 

 additional developmental stages, including a number of the 

 earlier ones, were collected by the present writer during a 

 visit (July, August, September) at the Hopkins Marine 

 Laboratory. 



1 1893, Ginn and Co., Boston. 



2 " Zur Outogenie eines Myxiuoiden," ' Sitzungsbericbten der mathematisch- 

 physikaliscben der K. Bayer. Akad. d. Wiss.,' Bd, xxvi, 1896, Heft 1, S. 

 67-74. 



" On some Points in the Development of a Myxinoid," ' Verbandlungen 

 der Anat. Gesellscbaft.' 



