156 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 4 



Seitularella tropica Hartlaub 

 Thuiaria tubuliformis (Marktanner) 

 Aglaophenia struthionides (Murray) 

 Cladocarpus distomus Clarke 

 Plumularia helleri Hincks 

 Zygophylax chazaliei Versluys 

 These all came from deep water; only two of the hauls were from 

 a depth less than 300 fathoms and one of them was at a depth of 2,845 

 fathoms in 13° 11.6' S. and 78° 18.3' W. It is little wonder then that 

 only four of these species, Acryptolaria pulchella, Haleciiim gracile, 

 Thuiaria tubuliforinis, and Aglaophenia struthionides, appeared in the 

 Hancock collections, where nearly all of the material has been taken 

 at less than 100 fathoms. 



Of the 20 species, two were described but not named, eight were 

 described as new, one is confined to the tropical Pacific, six have been 

 reported from the Atlantic, two from the northeast Pacific, and one 

 from both the Atlantic and the Northeast Pacific. 



Nutting, in his monographs on American Hydroids, records two 

 species from this area, Aglaophenia octocarpa Nutting, from Cape San 

 Lucas, and Lytocarpus philippinus (Kirchenpauer), from Panama. He 

 quotes Kirchenpauer who records Plumularia oligopyxis Kirchenpauer 

 from the west coast of South America. This is so indefinite that it is 

 impossible to say if it should be included in this area, and hence it is 

 probably better to leave it out. 



In 1930, Anna B. Hastings recorded a new species, Zanclea protecta, 

 from James Bay, Gorgona Island, and Taboga Island. This has not 

 been observed in the Hancock collections. 



There are 17 recorded species, therefore, that are not included in 

 the Hancock list. These with the 213 in the list make a total of 230 

 from this area. 



A table (Table I), similar to that used in the first paper, will show 

 the species distribution for all the Hancock material up to, and including, 

 1938. Table II gives the number of species in each family in each of 

 the areas; Table HI gives more detailed distribution of all of the species 

 in the collection that have been recorded also in the Northeast Pacific; 

 Table IV gives detailed distribution of all of the species found in the 

 Atlantic as well, but not in the Northeast Pacific; Table V gives the 

 detailed distribution of the species found in the vicinity of the Galapagos 

 Islands. 



