8o RESEARCHES IN HELMINTHOLOGY AND PARASITOLOGY. 



ous segments to an individual one and a half inches in length. 

 Tentaculse twenty-four in number, arranged in the four-fifths of a 

 circle, decreasing in length towards the extremities of the latter, 

 reflected, supplied with about forty-eight secondary tentacuhe, ar- 

 ranged in pairs ; two or three black eye spots on the back of the 

 long tentaculae. Two rows of setae in fascicles of about six, and 

 two rows of podal hooks in transverse series of ten. Setae in the 

 third to the ninth segment inclusive, in major part spade- shaped 

 with a .short subulate point ; of the following segments all like the 

 latter. Podal hooks in the first to the tenth segments inclusive, 

 bird-like in form, associated with opposing .spade-like podal spines, 

 Podal hooks of the following segments smaller than those anteriorly 

 Worm living in tough tubes composed of mud, and found in a hori- 

 zontal position partially concealed beneath mas.ses of Ash'angia 

 astraeformis . Point Judith. 



The plumose tentaculae with the dark eye specks on their back 

 render this worm a beautiful object. The surface of the tentaculse 

 is everywhere covered with vibrating cilia. By transmitted light 

 the blood appears of a bright green color. 



Clymcne Urceolahis, Leidy. Body cylindrical, composed of seg- 

 ments of various lengths, twenty-six in number, including the head 

 and caudal appendage. The anterior eight segments the shortest ; 

 the seven preceding the last ten the longest ; those in advance of 

 the third, and intervening to this and the sixth and the ninth, with- 

 out setae. Head obliquely truncated, concave, with a thin acute 

 margin . Mouth inferior triangular. Caudal appendage large , urceo- 

 late, with the margin entire. Color reddish brown. Length five 

 inches ; breadth one and a half lines. Raked from the mud in a 

 sound about six feet deep near Atlantic City, N. J. 



Qymc7ie Torqiiatus, Leidy. Body cylindrical, with a membraneous 

 collar at the fifth segment. Head abruptly truncated, concave, with 

 a thin membranous border emarginate below and on each side. 

 Mouth inferior, at the summit of a double-ringed papilla. Length ? 

 (the posterior portion of the only specimen found is either wanting 

 or the body terminates very abrubtly). The anterior fourteen seg- 

 ments measure one inch and a half in length by one line in breadth 

 Found with the preceding species. 



Pcdinaria Aiiricoma, Grube. (/*. Bc/gica, Grube, Gould ; P. 

 Groenlandica, Grube, Stimpson) ? Body composed of nineteen seg- 

 ments, including the head and tail. Paleae eight to sixteen in a 

 fasciculus, according to age. Twenty-eight denticulations to the 



