274 



PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 8? 



prostomium, and situated near the outer anterior prostomial angles. 

 The basal joint of the palp is long and C3''lindrical and extends almost 

 to the ends of the tentacles. The terminal joint is a mere knob. 

 The dorsal posterior tentacular cirrus extends to the middle of the 

 sixth setigerous somite, the dorso-anterior to the fourth, tlie ventro- 

 posterior to the third, and the ventro-anterior to the first. The 

 peristomium is hardly more than one-third as long as the prostomium 

 and is a trifle longer in the mid-dorsal line than on either edge. 





Figure 20. — New species of Nereis and Ciruatulus 



a-f, Nereis (Leptonereis) distorta: a, Anterior end, X 5; b, first 

 parapodium, X 18; c, anterior seta, X 300; rf, ei:.,'htecnfh p'.ra- 

 podiiim, X 12; e, thirtieth parapodium, X 12; /, second rorm of 

 seta, X 300. 



g, Cirratulus branchiatus: Anterior end, X 10. 



Except for the peristomium and first three setigerous somites, the 

 body is much distended with sperm. The first parapodhim (fig. 20, 

 h) has a prominent dorsal cirrus and conical notopodiai lip but no setal 

 lobe or acicula. The neuropodial setal lobe has rounded anterior and 

 bifid posterior lips and a single acicula. The setae are all compound 

 and homogomph, the terminal portion slender and elongated but 

 not much curved, and finely toothed along one margin (fig. 20, c). 

 Since from most of these the terminal joint has been broken, I am 

 unable to say whether they arc all alike. A notopodiai acicula first 

 appears in the tliird parapodium and is accompanied by a few setae 

 essentially like those of the neuropodium but much smaller, so that 

 under a hand lens the neuropodial setae aj)pear to be the onl}" ones 



