no. 3 hartman : polychaetous annelids 243 



Key to Species 



1. Parapodia relatively long and well developed; postsetal lobes 

 elongate, much longer than broad ; postsetal lobe truncate or at 

 least broadly rounded 2 



1. Parapodia poorly developed, short, broad; postsetal lobe much 

 shorter; color in life light green . . . H. calif orniensis 



2. Postsetal lobe rounded ; proboscis closely covered with elongate 

 papillae ; color in life red H. borealis, p. 244 



2. Postsetal lobe truncate ; proboscis sparsely covered with low pa- 

 pillae H. simplex, p. 243 



Hemipodus simplex (Grube) 

 Plate 43, Figs. 116-119 



Glycera simplex Grube, 1856, pp. 177-178. 



Hemipodus simplex Ehlers, 1901, pp. 155-156, pi. 18, figs. 11-15; Au- 

 gener, 1923, p. 69; 1924, p. 439; 1927, p. 351. 



Collections. — 366-35, 375-35, 846-38. 8 specimens. 



Length to 90 mm; number of segments over 150; pale (preserved) 

 and somewhat flaccid. Color in life not noted. Parapodial lobes are char- 

 acteristically long, particularly in anterior segments (pi. 43, fig. 116). 

 The presetal lamella is elongate, triangular throughout (pi. 43, figs. 116- 

 118). Dorsal cirri are inserted low, near the dorsal base of the parapodia. 

 Ventral cirri increase in relative length posteriorly, but do not surpass the 

 truncate postsetal lamella. 



These individuals resemble, in general appearance, color, and size, 

 those of H. calif orniensis from southern California. Some of the latter, 

 however, retain a greenish tint ; also the everted proboscis of H. simplex 

 is clavate, while that of H. calif orniensis is elongate, cylindrical. In H. 

 simplex the parapodial ramus is long, the lobes slender; in H. calif ornien- 

 sis the ramus is short, the lobes blunt, triangular. 



The papillae of the proboscis are unique in the 3 species indicated in 

 the key above. In H. simplex the papillae are sparse; each is short, tri- 

 angular (pi. 43, fig. 119), cusplike, the point directed forward toward 

 the distal end of the proboscis. In H. calif orniensis the papillae are elon- 

 gate, oval (pi. 43, fig. 120), the narrowest end distally, but both ends 

 smoothly rounded; they are circular in cross section. In H. borealis the 

 papillae are bluntly conical, the base truncate (pi. 43, fig. 121), circular 

 in cross section. 



