22 AKT. II. — A. IZUKA 



Polynoè hrancliifcra (Moore). 



1903. Lepidouotus brancliifeius, Moore. Pros. Acad. Nat. Sc. Philad. Vol. 

 LV, p. 409; pl. xxiii, figs. 7-9. 



Tho main characters of this species may be summarized as 

 follows : 



Body short, broad, elHptical, somewhat depressed, measm^ing 

 26.5 mm. in length, 14 mm. between tips of bristles, 11 mm. between 

 lateral margins of elytra. Number of segments 26. 



Prostomium decidedly wider than long, its lateral margin 

 with prominent preocular protuberances, making this region the 

 broadest part of body ; the anterior pair of eyes much larger and 

 more prominent than the posterior. Median tentacle with stout 

 basal piece slightly shorter than prostomium, style about 4 times 

 the length of prostomium and with a subterminal enlargement and 

 a short terminal filament. Lateral tentacles with ceratophores less 

 than J the length of that of median tentacle, continuous with 

 frontal processes of prostomium. Subtentacles with very broad, 

 widely separated base, fully one half of which projects beyond the 

 sides of prostomium. 



Dorsal tentacular cirrus similar in form to the median tentacle, 

 Ijut with a longer filament and a slightly shorter style. 



Nephridial papillae visible so far forward as the 4th seg- 

 ment, but the first three are very small, the others being exactly 

 as in F. chltoniformis. Dorsal tubercles likewise as in that 

 species. 



Branchiae arranged in the same manner as in P. chitoniformis, 

 Ijut are larger and more conspicuous though simpler in structure 

 and less in number. All branchiae rather long and slender ; totally 



