Polychcetous Annelids from Florida, Porto Rico, Bermuda, etc 267 



ary teeth (plate 3, fig. 15). The pennoned setae on the thorax have rather 

 heavy stalks with very delicate, slender terminal portions. The tube is tough 

 chitin, dark brown in color and very difficult to remove from alcoholic speci- 

 mens without injuring the specimen. 



Type in American Museum of Natural History. 



Collected in the Dry Tortugas in 1914 and at Guanica Bay, Porto Rico, in 

 1915. 



Parasabella sulfurea n. sp. 



Length of body of type 65 mm., 18 mm. of which was in the length of gill. 



The gills arise from a rounded basal portion as long as the first 4 body 

 somites. There are about 15 on a side, of nearly uniform length, and with 

 no inrolling on either edge. A very short portion of the apex of each rachis 

 is free from pinnules. For a distance about equal to the length of the basal 

 portion the rachises are united by a delicate web. Beginning just beyond 

 the web and extending to beyond the middle of the rachis each carries on 

 either side of its outer surface a row of minute purple spots. The basal por- 

 tion of the gills is mostly of a purple color, while their greater part is sulphur- 

 yellow, though an occasional pinnule is purple, but these are too few to affect 

 the general coloration. Tentacles slender, pointed, about twice as long as 

 basal portion of the gills. 



A specimen collected in 1909 had, while living, a body bright yellow in color, 

 with a greenish tinge dorsally and some purple markings on the dorsal surface 

 of the collar In alcoholic material the body is colorless, except for the ventral 

 shields, which are a grayish brown throughout. 



Collar rather low, its dorsal ends widely separated (plate 3, fig. 16) while 

 ventrally the ends are nearly in contact (plate 3, fig. 17). Each ventral end 

 is prolonged into a triangular recurved lobe, and at the base of the lobe is a 

 pad-like thickening of the collar. The whole collar is very inconspicuous 

 and has a recurved edge. 



The torus of the first somite is arranged obliquely just posterior to the 

 dorsal free end of the collar on either side (plate 3, fig. 16). On the next 

 7 somites the torus is lateral and ventral to the seta tuft. Beginning with 

 the ninth somite and extending throughout the remainder of the body the 

 torus is dorsal to the seta tuft. 



Setae of first setigerous somite of two sorts; one with a long, slender shaft 

 (plate 3, fig. 18), the apex bent and narrowed to an acute point, with an indi- 

 cation of a lateral wing on both the concave and convex sides of the bend: 

 the second form is stouter, with the apex rounded and covered with spines 

 and terminating in a short, slender point (plate 3, fig. 19). 



Setae of later somites of four kinds. In the tuft about equal numbers of 

 slender forms with curved apex, the bent portion covered with spines (plate 3, 

 fig. 20) and of stouter forms with rounded ends (plate 3, fig. 21). In each 

 torus is a single row of uncini, each with a single tooth and a long basal bar. 

 Dorsal to the tooth are numerous fine surface striations, but no indication of 

 secondary teeth (plate 3, fig. 22). In addition, below the uncini is a row 

 of pennoned setae (plate 3, fig. 23). 



Common in the Tortugas, living in a dark-brown chitinous tube, usually in 

 holes in solid coral rock. The tube is usually much longer than the animal 

 and apparently its secretion keeps pace with the deposition of the rock. 



Type in American Museum of Natural History. 



I have included this in the genus Parasabella of Bush (1905, p. 191), distin- 

 guished from Sabella by the absence of a lateral incision in the collar lobe. In 

 its general appearance and form of setae it resembles Protulides elegans of 

 Webster (1884, p. 325), but differs in the form of the collar. 



