958 REPORT OF COMMISSIONER OF FISH AND FISHERIES. [32] 



facies of the deep-sea fauna, as far as known, leads us to suspect that 

 there are few fixed hydroids on the floor of the Gulf Stream which have 

 free luedusiform gonophores. We must suppose also that a large 

 number of the deep-sea hydroids, allied as they are to Plumularida), 

 have no niedusiform gonophores which come to the surface. The num- 

 ber of these medusie in the Albatross collection examined is very small 

 as compared with the Acraspeda and Trachymedusse. They are also 

 mostly of large size, which may indicate a cause of their great minority 

 in numbers. 



Family TIAEID.E Haeckel (1877). 

 TuERis EPiscoPALis (Forbes). 



Family CANNOTIDJ3 Hseckel (1877). 

 Staurophoka LACINIATA xig. 



Family incertse sedis.* 

 Calycopsis typa, Fewkes. 



* Calycopsis is iu certain respects allied to the ^quoridie of E-schscboltz, from which, 

 however, it has many differences. My impression is that it may form a subfamily of 

 the Tiaridie; but of that I am in considerable doubt. 



