170 BUSH 



Of the 35 species from Alaska described as new to the North 

 Pacific fauna (p. 179), only 4 Spirorbis spirillum (Linne) 

 and variety lucidus Montagu, Spirorbis morchi Levinsen, 

 Spirorbis quadrangular is Stimpson, and Spirorbis violaceus 

 Levinsen appear to be circumpolar ; of these but one Spir- 

 orbis spirillum (Linne), with its variety lucidus Montagu ex- 

 tends southward along the California coast. Schizobranchia in- 

 signis sp. nov. appears at Vancouver Island, where also Eudis- 

 tylia tenella sp. nov. is found. 



Of the remaining species, 9, as far as known, occur only 

 on the coast of California (at Pacific Grove), i on the coast of 

 Mexico, and i on the coast of Honolulu. 



The 148 species given in the list (p. 172) as previously re- 

 corded from the Pacific were about equally distributed north and 

 south of the equator, there being but 9 more above than below 

 it before Moore (1904) added 13 from the coast of Japan; but 

 in the North Pacific those forming the more or less flexible 

 tubes are numerous, while in the South Pacific those building 

 firm calcareous ones predominate. Only 8, however, have thus 

 far been found from Puget Sound northward along the coast 

 of Alaska. 



As will be seen by the following list, most of the forms, the 

 larger number of which are of unusual size, are representatives 

 of well-known genera. 



Among the Polynoidae and closely related families, as well as 

 among the Sabellidae and Serpulidae, are to be found most of 

 the unique forms, although there are two very interesting sexual 

 individuals, one similar to that figured by Orsted (1843) as 

 Polybostrichus, now placed with the Syllidae, and another, of 

 unknown relationship, which has the ventral surface covered 

 by large clusters of eggs attached to each segment in pairs. 



LIST OF FAMILIES AND KNOWN GENERA REPRESENTED 

 IN THE COLLECTION. 



APHRODITAC^E Harmothoe, 8 sp. 



Iphione ? Lanilla f 



POLYNOIDAE Polynoe, 2 sp. 



Lepidonotus, 3 sp. Lepidametria f 



