NO. 1 HARTMAN : POLYCHAETOUS ANNELIDS 91 



First segment modified, provided with a pair of stout acicula and 3 

 appendages, a small papillar cirrus on its median side (the transposed 

 prostomial antenna) and 2 cirriform, peristomial tentacles laterally. 



Parapodia subbiramous, the notopodium represented only by a dor- 

 sal cirrus and an aciculum. Neuropodia well developed, provided with 

 stout, simple setae and composite falcigerous setae. Anal cirri 2, long, 

 cirriform. 



Pisione oerstedi Grube 



Plate 27, Figs. 321-325 



Pisione oerstedi Grube, 1856, p. 175; Ehlers, 1901, p. 61; Augener, 



1924, p. 298; 1926, p. 445. 

 Pisione contracta Ehlers, 1901, p. 64. 



Collection. — 375-35. About 30 specimens. 



Length 20 to 48 mm; number of segments 125 to 160. Proboscis, 

 everted in some, with 7 dorsal and 7 ventral terminal papillae (pi. 27, 

 fig. 321) and 2 pairs of stout, curved jaws. The third segment (second 

 setigerous) has a stout cirrophore with an elongate dorsal cirrus (pi. 

 27, fig. 322). Its simple setae resemble those in more posterior segments. 

 The embedded acicula are either straight, rodlike, or distally curved 

 (pi. 27, fig. 325). Some acicular setae occur singly in a parapodium, 

 or sometimes in twos (pi. 27, fig. 324). Inferior to them are about 6 

 composite, falcigerous setae (pi. 27, fig. 323). 



Distribution. — Peru; Chile. Intertidal. In addition, Augener, who 

 had access to Ehlers' types at the Hamburg Museum, recorded it from 

 New Zealand and Ceylon. The former is based on a single complete 

 specimen, only 2 mm long. This is conspicuously less than the length 

 typical for the Peruvian individuals (see above). The Ceylon record 

 is based on a single specimen, indicated as "unbestimmt" ! (Augener, 

 1924, p. 299). 



PISIONELLA, new genus 



Prostomium with a conspicuous, median, cirriform antenna, inserted 

 on a cirrophore at the anterior margin of the prostomium. Buccal seg- 

 ment with 3 pairs of cirriform cirri, of which 1 pair perhaps represents 

 the paired prostomial antennae. No acicula or setae in the first segment. 

 Second segment with a ventral cirrus resembling the superiormost cirrus 

 of the buccal segment, and with globular dorsal cirrus, terminating in 



