1908.] NATURAL SCIENCES OF PHILADELPHIA. 351 



narrow band on eacli side, with a dorsal interval equal to the inter- 

 branchial space and a longer ventral interval. These eyes are ordi- 

 narily concealed by the inrolled margin of the prostomial fold. The 

 inequality of the gills seems to be a constant character and the number 

 of setigerous segments is 17, as stated by Johnson. Part of a tube is 

 covered with small pebbles, sea-urchin spines, bits of eel grass, etc. 



None of the specimens was found near the type locality in Puget 

 Sound, but all in Alaskan waters at the following stations: 4228, 

 vicinity of Naha Bay, Behm Canal, southeastern Alaska, 41-134 

 fathoms, gravel and sponge; 4259, Dundas Bay, Icy Strait, 21-78 

 fathoms, gray sand, broken shell and rock; 4283 Chignik Bay, 30-41 

 fathoms, black sand and brown sponge; 4289, Uyak Bay, Kadiak 

 Island, 74-80 fathoms, gray mud, 



Pista cristata (MuUer) Malmgren. 



Pista crislata Malmgren, Ofvers. Kongl. Vet.-Akad. Forh., 1S65, pp. 382, 383. 



The single example of Pista referred to this species agrees with those 

 dredged by the Albatross off the coast of Japan, and differs from P. 

 cristata as described by European authors in having the upper free 

 angle of the lateral subbranchial membrane of IV much more produced 

 and prominent, quite equalling that of III. Otherwise they agree, so 

 far as can be ascertained, in all features. The handles of the uncini on 

 V are longer than the others, but there is no other difference. 



Station 4225, Boca de Quadra, southeastern Alaska, 149-181 

 fathoms, dark green mud. 



?Pista fasciata (Grube) Marenzeller. 



Pista fasciata Marenzeller, Denlvs. Kais. Akad. Wissensch., 1885, Abth. 2, 

 pp. 202-204. 



Concerning the reference of the fine species of Pista found at several 

 stations in southeastern Alaska to the above named, I am in much 

 doubt. Grube's description of Terehella fasciata is not sufficiently 

 precise for certain determination, but the excellent accounts and 

 figures given by Marenzeller and Mcintosh seem to me to refer to 

 different species. In any event the figure of the branchiae given by 

 the latter would not answer for these specimens, as the terminal twigs 

 are much more spreading and uneven. About 3 or 4 main branches 

 spring from the trunk, and these immedia.tely branch and rebranch 

 asymmetrically 8 or 10 times, the main stem being always recognizable, 

 but bending at each point of branching and tapering continuously to 

 the end. Usually 3 gills are well developed, and 1 is either very 

 small and entirely without branches or may be altogether wanting. 

 Which are well developed appears to be quite accidental. They may 



