THE SESSILE BAENACLES. 



95 



Maxilla with six spines between upper and lower pairs. Cirrus iii 

 with a few twin spinules, intermediate between figures 19a and 206. 

 Cirrus vi has five pairs of spines. 



Fig. 20.— B. amphitrite niveus, Marco, Fla. a, ftrn segment posterior ramus of cirrus in. b, 6th 



SEGMENT ANTERIOR RAMUS CIRRUS HI. C, 1ST CIRRUS, d, LABRUM. e, PALPUS. 



Cedar Keys, Florida. — Maxilla with five spines between upper and 

 lower paii-s, the latter standing on a little projection. Otherwise like 

 Marco niveus. 



Reliohotli, Delaware. — Cuticle thin hut persistent on parietes and 

 radii. Gray lines distinct. In some examples the carina has a 



Fig. 21.— B. AMPHITRITE NIVEUS, Rehoboth, Del. a, labrum and palpus, b, mandible, c, two 



SEGMENTS FROM THE POSTERIOR RAMUS OF CIRRUS HI. 



violet tint. Scutum with the ridge below the articular ridge weak, 

 adductor ridge strong and longer than in Marco individuals. Labrum 

 with two-notch-tlii*eo teeth. Cirrus i, 17 acd 11 segments. Cirrus 

 ii, 12 and 10 segments, the posterior ramus thi'ee-fourths as long as the 



