1910.] NATURAL SCIENCES OF PHILADELPHIA. 493 



9th fascicle continues as a wide, free, unbroken border across the body 

 to the opposite fascicle; the fascicles forming a straight series. The 

 setae on the collar are badly injured; a few show simple tapered rather 

 stiff blades similar to those on the following segments; in the 7th to 

 9th fascicles, there are a few curved setae with short blades and broad, 

 deeply serrate ends. On the abdomen the setae are curved somewhat 

 in cresent shape rather narrow and abruptly tapered toward the tip. 

 Uncini similar to those of Protula and Apomatus. 



SUBPROTULA gen. nov. 



Branchial lobes jsmall, not spiral, the branchiae in a semicircle. No 

 operculum. Collar three-lobed (3). Thoracic membrane a free mar- 

 gin to the fifth (5) segment, no posterior border. Thoracic segments 

 seven (7). Setae similar. -'Jncini irregularly trapesiform with a 

 number of teeth, the last large and square cut. Type, the following- 

 species : 



Subprotula longiseta sp. nov. 



Nine good sized specimens (about 20 mm. long) taken from dead 

 coral from Castle Harbor, have short rachis-like branchial lobes, not 

 spiral, with the moderately long, rather stout branchiae extending 

 their entire length forming a kind of semicircle; the end of each 

 abruptly contracted above the long pinnae then expanding into a 

 conspicuous club-shaped tip, the inner surface covered with minute 

 papillae; on one or two these appear to have become greatly enlarged, 

 forming a closely crowded mass. On the sides of each rachis. which 

 number fifteen (15) in each lobe, there are similar rounded or pear- 

 shaped papillae resembling uncolored occelli, close together at the 

 base, becoming well separated distally. No operculum. Thoracic 

 membrane very much developed, forming a deep rolling three (3)-lobed 

 collar extending backward along the sides, gradually diminishing in 

 width from the very large angular lateral flaps to the fifth (5th) fascicle 

 of setae. There is no free posterior border. In front of the large 

 median lobe a triangular or tongue-shaped process protects the 

 mouth. There are seven (7) fascicles of setae on the thorax and six 

 (6) tori ; each of the latter situated on the posterior edge of a rectangu- 

 lar membrane successively increasing in size, often overlapping each 

 other. Setae numerous, all similar, very long, slender, with long capillary 

 ends, the inferior ones the broader and more curved; on the collar a 

 few capillary ones. Uncini with about sixteen (16) teeth on the 

 largest, the terminal one very large and truncated, not at all like that 

 of Protula. There are between fifty (50) and sixty (60) abdominal 



