1903.] NATURAL SCIENCES OF PHILADELPHIA. 487 



what in shape. Typical uncini with rather slender curved internally 

 fibrous stems, without a distinct shoulder but rather gradually thick- 

 ened on one side, external to the body contracted in diameter and bent 

 dorsad, then broadly expanded into the terminal head, which is pro- 

 vided with one very large scarcely fibrous hook supported by usually 

 4 successively smaller fibrous ones, which do not form a cap-like struc- 

 ture; guard or beard moderately developed, consisting of about 20 

 stiff shghtly curved hairs, somewhat divergent from a prominent 

 subrostral process and enclosing the tip of the principal hooked 

 process. 



The type only known from Suruga Bay, 3,739, 55-65 fms. 



CHLORH^MID^. 

 Stylaroides borealis (Hansen). 



A single specimen which conforms closely to the description of this 

 North Atlantic species, but is fully three times the length of the origi- 

 nal specimens taken off the coast of Norway, was dredged at station 

 3,775, North Japan, in 57 fms. 



STERNASPID^. 

 Sternaspis scutata (Ranzani) Otto. 



The only difference which can be detected between these and Euro- 

 pean specimens is that the gill plates of the former are shghtly more 

 prolonged anteriorly. 



Suruga Bay and \ncinity, 3,709, 173-260 fms.; 3,739, 55-65 fms. 



