SABELLIDES AND SERPULIDES 



199 



branchial lobes much prolonged ventrally, and spirally coiled, and the 

 collar distinctly four-lobed, with conspicuous ventro-lateral and ventral 

 incisions. The name Dasychonopsis is therefore proposed for D. pal- 

 lidus sp. nov., as type. D. compressa Ehlers (1887) and D. curta 

 Ehlers (1901) are related species. 



DASYCHONOPSIS PALLIDUS sp. nov. 



Type locality. Honolulu. 



A small nearly colorless species, with long slender branchiae about 

 one half as long as body, a little rust color on the branchial lobes and 

 minute darker dots at the outer end of each torus. 



Branchial lobes small, not prolonged ventrally, neither spiral nor 

 involute, bearing 9 pairs (18) of branchiae having slender four-sided 

 rachises, with moderately long, delicate, tapered tips, often curled in- 

 ward, connected posteriorly by a shallow inconspicuous membrane ; 

 slender, well-separated pinnae along their two inner edges, and com- 

 paratively stout tapered processes, forming 5 to 8 pairs, situated at 

 regular intervals along the two outer ones ; between the processes a 

 pair of yellowish brown eyes often occur ; at the edge of the inter- 

 branchial membrane a single long, slender process, turning outward, 

 arises from the dorsal outer edge of each rachis. 



Collar two-lobed, without lateral incisions, of nearly uniform depth, 

 arising abruptly just above the dorsal setae, widely separated, ending in 

 angular ventral flaps. 



Number of segments 18, of which 5 belong to the thorax, on which 

 the small circular fascicles of setae form oblique series. 



Collar setae long, regularly tapered, of two forms, narrow and 

 broad ; on the other thoracic segments broad ones only ; on the abdo- 

 men they are of two forms, similar to those on the collar but much 

 longer ; uncini only in all the tori, those on the abdomen with more 

 numerous apical teeth. 



Entire length 7.5 mm. ; branchiae about 4 mm. 



Kinberg (1866) described Sabella havaica from Honolulu as hav- 

 ing the outer processes on the branchiae, characteristic of Dasychone. 

 Although similar in size (8 mm.) to the present species, it has 13 

 branchiae and 44 segments. 



Genus Parasabella nov. 



Type, Parasabella media sp. nov. 



This generic name is proposed for species which, though resembling 

 typical Sabellas in form, have the branchial lobes small, but slightly 



