58 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 15 



terior segments. However, the illustrations (Chamberlin, pi. 63, figs. 4, 

 5) show parapodia in anterior and posterior regions that differ only 

 slightly. It seems likely that the setae in posterior segments were with- 

 drawn into the parapodium so that articulations were not visible with- 

 out dissection. The bilobed, presetal and postsetal neuropodial lobes of 

 this species recall those of Glycera tesselata Grube, with which the 

 species seems to have its nearest affinities. 



Key to Genera of GLYCERIDAE 

 1. Parapodia uniramous throughout, provided with only composite 



setae Hemipodus, p. 79 



1. Parapodia biramous, with simple setae in notopodia and com- 

 posite setae in neuropodia 2 



2. Prostomium long, with more than 3 rings; aileron of jaws 



with a lateral wing (pi. 11, fig. 4) . . . . Glycera, p. 58 

 2. Prostomium short, with about 3 rings; aileron of jaws a 



simple rod Glycerella, p. 79 



Genus Glycera Savigny, 1818 

 Type G. unicornis Savigny 



This includes Euglycera Verrill, 1881, Rhynchobolus Claparede, 1868, 

 Hamiglycera Ehlers, 1908 and Telake Chamberlin, 1919. 



This genus comprises about 39 valid species (see list, below) but 

 it has had over a hundred specific names attributed to it during the 

 course of its history. Some species remain too poorly known to be dis- 

 tinguished. Others are known only from isolated geographic or ecologic 

 regions so that their possible identity is sometimes difficult to surmise. 



Separation into more clearly recognizable groups, such as subgenera, 

 has long been desired. Arwidsson (1899) expressed it concretely and 

 suggested a segregation, based however on characters that are difficult 

 to distinguish. These were the presence or absence of epitoky, the rela- 

 tive extent of a proboscidial membrane, and the presence or absence of 

 anal processes. Other morphological features, not necessarily correlated 

 with the presence or absence of these characters, may have as great, if 

 not greater, phylogenetic significance. 



The detailed structure of the fleshy parapodial lobes has been the 

 most satisfactory index for the ready identification of most species of 

 the genus, at least for geographic or regional reports. Unfortunately 

 these lobes are subject to injury, or are variable within unpredictable 

 degrees for species with wide distributional ranges; also, the extent of 

 their development may have no real phylogenetic value. Another more 



