232 



Annelida ChcefojxxJa 



lobes, upper and lower. Lower lingula, similar to upper, 

 but shorter ; after the first few segments projecting a little 

 beyond the lower ramus. 



Dorsal cirri, delicate, conical, not quite reaching the end 

 of the upper lingula. 



Ventral cirri, similar to dorsal cirri, bat shorter ; they 

 arise below (within) the base of the lower lingula from a 

 slight elevation, and reach about to the middle of the lower 

 lingula. Further back the upper lip of the dorsal ramus 

 becomes smaller and finally disappears. The posterior lip 

 of the ventral ramus also disappears, and the terminal 

 division of the anterior lip into lobes becomes less marked. 

 The ventral cirri shorten and recede from the lower lingula, 

 while the feet have their basal portion much elongated. 



Setje. all of one kind on the anterior feet (£ 63). Ap- 

 pendix slender, acute, edge beset with numerous short 

 hairs. Terminal points of stem in the same plane [Aj-eies 

 homogomphes Clpd.). They are arranged in three bundles, 

 one in the dorsal ramus, two in the ventral. Ventral setae 

 very numerous and crowded. Falcate setae (f. 64) occur 

 first between the 30th and 40th segments ; at first in the 

 lower bundle, few in number ; becoming more numerous, 

 they occur also in the upper bundle of the lower ramus, 

 bnt never entirely replace the first form, and disappear 

 again in the posterior segments. 



Proboscis (f. 57) about twice the length of the head. 



Paragnathi, i, fail; ii, 6 to 10 in small bunches; iii, 2 

 or 3 irregular transverse rows ; iv, 10 to 12 in bunches. 

 All black, small, conical, the inferior (iii), smallest; v, vi, 

 vii, viii, fail. 



Jaws, usually light horn color, with dark brown or black 

 edges and tips; curved, twisted externally; denticles 

 small, number variable. In the dorsal ramus there is 



