Annelida of the Bermudas. 665 



Polycirrus corallicola, sp. nov. 



A small, slender species, swollen anteriorly, attenuated posteriorly, 

 consisting of about 45 segments in the type (perhaps immature). 

 Cirri very numerous, slender, often clavate. 



Fascicles of capillary setse are present on 23 segments; rows of 

 uncini begin on the 7th setigerous segment and continue to the end 

 of the body; setae and uncini are both present on 17 segments; 16 

 posterior ones have uncini only, the last rows with very few (2 or 3) 

 minute ones, but they have filiform posterior ligaments. 



The setae are of two kinds: 4-6 smooth, slender, narrowly limbate, 

 acute ones, often bent distally; and 5-8 more slender, bipennate ones, 

 with rather long, hair-like denticles and very acute tips. Farther 

 back each kind becomes shorter, stouter and fewer. 



The uncini are minute, in single rows, the longest rows with about 

 25 ; they are usually longer than high, with a long, narrow base, 

 tapering to a narrow, subacute anterior end, which terminates in a 

 small muscle-tubercle; the posterior end of the basal plate is prom- 

 inent, with a distinct ligament-tubercle; the rostral hook is large, 

 long, incurved, nearly as long as the base; there are two small 

 appressed apical hooks, the second one very small. In a top- 

 view there seems to be a row of three very minute, distal, apical 

 denticles. 



The color, in life, is red. Bailey Bay, 3-4 feet, in corals. 



Length of the type, 10™""; diameter, 1°°^ in formalin. 



Polycirrus pennulifera, sp. nov. 



A small, slender species, composed of about 65 segments, elon- 

 gated . posteriorly and swollen anteriorly, with numerous slender, 

 highly contractile cirri. The setJB are present on 20 segments. 

 Uncini begin on the 21st in very small .rows and continue on about 

 40, or close to the end. They are very minute, and none of the rows 

 are very long (15 or 16); they are longer than high, with a long 

 wedge-shaped base, acute anteriorly, with a small terminal muscle- 

 tubercle; the posterior angle is rounded and prominent; the pos- 

 terior upright edge is concave in the middle; the rostral hook long, 

 very acute, scarcely incurved, considerably shorter than the base 

 and nearly parallel with it; there are two small, apical, closely 

 appressed hooks, the second very small. 



The sette are slender, with the blade flattened and rather strongly 

 bilimbate, so that they have a linear-lanceolate form, acuminate at 

 tip ; the limbus is obliquely striated, and the edge is minutely pen- 



