668 A. E. Yerrill — Turhellaria, Nemertina, and 



From near the center of the head and below these other organs, 

 arises a peculiar shaped one, attached to the head by a long, slender 

 stem, having a rounded swollen central portion, with a moderately 

 long, rather blunt, articulated, curved terminal portion. 



Setoe of the dorsal bunch of one form, very numerous, like fine 

 tapered hairs of graduated lengths, very delicately microscopically 

 spinulose. There are four distinct forms in the ventral bunch. 

 There are 8 or 10 in the lowest series, of graduated lengths, having 

 smooth, slender, tapered, 2-4:-jointed terminal portions, with deli- 

 cate bifid tips, affixed in broader, shorter basal portions ; above, a 

 series of 8-10 with short, broad, graduated terminal portions having 

 conspicuously curved, bifid ends, affixed in much broader, very long 

 basal portions; above these, 3 or 4 long, slender ones, with 3-4-jointed, 

 smooth, terminal portions having delicately tapered ends, affixed in 

 broader, conspicuously spinulose basal portions ; above these, 3 or 



4 shorter stiff ones, conspicuously spinulose and rather broad, with 

 regular tapered, striated or delicately banded ends. 



Other species from this region belonging to the Sigalionidse (Siga- 

 lionina Kinberg, 1855-58) are Sthenelais articulata Kinberg, 1855-58; 

 Sigalion Edioardsi Kinberg, 1855-58 (= Thalanessa Baird, 1865) ; 

 ? Sigalion pergamentaceian Grube, 1855 ; and Sigalion Pourtalesii 

 Ehlers, 1887. 



The S. articulata differs in having long, articulated palpi, a smaller 

 tentacular lobe, and smaller eyes. 



Chrysopetaluin elegans Bush, sp. nov. 



Two specimens of a very beautiful species belonging to the above 

 genus were collected in 1-3 feet. The larger one has about 05 seg- 

 ments and measures 15""™ in length and 2""^ in greatest breadth, 

 including the setoe, and about 1""" in thickness. 



The palese are of a beautiful light golden color and are arranged 

 in two series of from 15-20 on each segment, spreading out like a 

 bunch of palm leaves, and from about the ninth segment meeting 

 over the center of the back, forming a conspicuous ridge along the 

 dorsum of the body. They have the form of long, narrow leaves, 

 with coarsely serrulate margins, curved upward, and long spinulose 

 tips; the center having coarse, equally separated, longitudinal ribs, 



5 or 6 in number, running the entire length ; the entire surface is also 

 cross-striated and covered with microscopic granules. 



The dorsal and ventral rami are well-separated, making the body 

 somewhat angular in outline. Each is supported by a single acicu- 

 lum. The dorsal one the shorter, with a prominent, swollen, brown- 



