264 BULLETIN 100, UNITED STATES NATIONAL MUSEUM'. 



This may have been of the subspecies cylindricu m , which is the Tacific form in our collections. 

 ■ Tin' i lentiflcal i ■ > n of rhi> small specimen is a little doubtful. 



1 itions of these Atlantic forms do no! show clearly the features we h i\ e taken as distinctive 

 of P. atlanticum atlanticum. This species may very likelj occur in the Atlantic ( cean, bu1 h is equally 

 i lial (he \i lantic forms are of the sorts which we have grouped under the name intermedium, which 

 no i' ipre enl a single, true subspecie 

 The tub i»' ;ie gigantcumocoxasin. the Atlantic* icean, and if is probable that the reports of "giganteum" 

 from the Mediterranean Sea apply properly to this sub, p.' ie 

 7 Our colony of this form, obtained from' the Naples Zoological Station, was probably collected in the 

 a We literranean Sea, but it bears no locality label. 



A complete statement of t lie stations represented in our collections, 

 arranged by species and subspecies, follows. When more than a 

 single specimen was found, the number of specimens is given in 

 brackets (as [4]) after the station. 



PYROSOMA AGASSIZI. 



Nine dredging stations from the Albatross Philippine Expedition; 

 L907-1910, as follows: 5126,5233,5320,5378,5458,5498, 551%, 5543, 



5607, all from among or near the Philippine Cslands, and from off 

 the Pacific coast of Panama, at station 3388 (Albatross) [3]. 



PYROSOMA SPINOSUM. 



Albatross Philippine dredging stations 5613 and 5631, and station 

 Albatross), in Vineyard Sound, off the Massachusetts coast. 



