A TAXONOMIC STUDY ON PYROSOMA METCALF AND HOPKINS. 265 



PYROSOMA VERTICILLATUM, subspecies CYLINDRICUM. 



Albatross Philippine dredging stations 5120, 5125 [7], 5320, 5456[10], 

 5437 [2], all among or near the Philippine Islands. 



PYROSOMA HYBRIDUM. 



Albatross Philippine dredging stations 5238 [2], 5320 [11], 5457 [2], 

 5458, all among the Philippine Islands. 



PYROSOMA ELLIPTICUM. 



Albatross Philippine dredging station 5319, in the northern China 

 Sea; and three small colonies of doubtful identification from station 

 3788, AA 15 (Albatross), latitude 4° 35' N.; longitude 136° 54' W., 

 600 miles north of the Marquesas Islands. 



PYROSOMA ATLANTICUM ATLANTICUM. 



Albatross Philippine Expedition, 17 dredging stations among and 

 near the Philippine Islands (5120 [13], 5125[3], 5128[13], 5155, 5175[4], 

 5183, 5195, 5223, 5263, 5299, 5331[4], 5366, 5409[5], 5410[3], 5437[12], 

 5613, and an unnumbered station "Jolo anchorage"); Albatross sta- 

 tion 5064[12]; an unnumbered station off La Jolla, California, [3] 

 (Ritter); a station of the Carnegie Magnetic Expedition, between 

 Hawaii and California, not more accurately located; a specimen bear- 

 ing a label of Ward's Natural Science Establishment, giving the local- 

 ity merely as "South Pacific"; and two small specimens, of doubtful 

 identification, from Albatross stations D 5124, in the Philippine Is- 

 lands, and 3750, off Honshu, Japan. 



PYROSOMA ATLANTICUM, subspecies HAWAIIENSE. 



A station of the Carnegie Magnetic Expedition, between Hawaii and 

 the California coast, not more accurately stated [6]. 



PYROSOMA ATLANTICUM, subspecies PARADOXUM. 



An unnumbered station of the Albatross Philippine Expedition, 

 Lat. 25° 10' N., Long. 166° 20' W. 



PYROSOMA ATLANTICUM, form DIPLEUROSOMA. 



Five dredging stations of the Albatross Philippine Exhibition, all 

 among the Philippine Islands, 5196[2], 5262[3], 539S[2], 5403[2], 

 540S[5], and a specimen bearing a label of Ward's Natural Science 

 Establishment, naming the locality merely as "South Pacific." 



PYROSOMA ATLANTICUM, subspecies GIGANTEUM. 



Eleven dredging stations in the western north Atlantic Ocean, from 

 the Bahamas to Cape Cod (Albatross, 2088, 2089, 2091, 2094, 2171, 



