264 E. S. GOODRICH. 



very much by itself; the shape of its setae, and above all the 

 situation of its gonads, place it in the family Tubificidae, but 

 its more intimate relationships remain obscure for the present. 



March 30th, 1894. 



List of Works referred to. 



1. Benham, Dr. W. B. B. — " The Nephridium of Lumbricus," ' Quart. Journ. 



Micr. Sci.,' xxxii, 1891. 



2. Benham, Dk. W, B. B. — "Notes on some Aquatic Oligochseta," 'Quart. 



Journ. Micr. Sci.,' xxxiii, 1891. 



3. GooDiiiCH, E. S. — " On a New Organ in the Lycoridea, &c.," ' Quart. 



Jouru. Micr. Sci.,' xxxiv, 1893. 



3a. Goodrich, E. S. — "Note on a New Oligochsete," 'Zool. Anz.,' xv, 

 1892. 



4. Hesse, Dr. B. — "Beitrage zur Kenntniss des Baues der Enchytraeiden," 



' Zeitschr. f. wiss. Zool.,' vol. Ivii, 1894. 



5. Stolc, Dr. A. — "Monografie Ceskych Tubificidu," 'Abh. k. Bohm. 



Ges.,' 1888. 



6. Vejdovsky, Professor P. — "Sur une nouvelle Planaire terrestre," 



'Revue Biol, du Nord de la Prance,' 2 ann., 1890. 



