Ihb BULLETIN OF THK UURP:AU OF FISHERIES. 



.^•OLOiOMATIl)^. 

 ^olosoma tenebrarum Vejdovsky. 

 jEolosoma tenebrarum Vejdovsky, System u. Morphologic der Oligochaeten, p. 21. 1884. 



Three specimens in the Lake St. Clair collection agree closely with this European species which 

 has been recorded from Illinois by Professer Smith. They are, however, very small, varying from 1 

 to 3 mm. in length. According to a note furnished by Professor Ward they were, when alive, semi- 

 transparent grayish, with sparse greenish yellow oil drops. They were taken from the surface of a log 

 at New Baltimore, Mich., on August 2, 1893. 



X.\1DI[).€. 

 P Naidium, sp. Ward. 



Professor Ward's notes mention a species of Naidium collected in the bottom t:iw at various times 

 between August 8 and 25, 1893, at New Baltimore, Mich., but the specimens can not be found in the 

 material furnished to me. The description is as follows: 



"Length, 1.785 mm. to 2.95 mm.; diameter, 0.25 to 0.35 mm.; metameres, 14 to 26. Setae in 4 

 rows; the dorsal beginning on the third, the ventral on the second metamere; the dorsal hair like, 1 

 long, up to 0.546 mm., and 3 or 4 short, 1 or rarely 2 of which may equal half the length of the long 

 one; ventral setse, 5 to 7, hooked and very unequally bifid at the end and doubly bent internally. 

 Head abruptly rounded in the smaller, furnished with a small papilliform proboscis in the larger 

 examples, with numerous sensory hairs but no eyes. Oesophagus short; intestine beginning at second 

 metamere, grayish on account of the presence of numerous light yellowish oil drops 2 /< in diam- 

 eter, a dark band across the anterior end of each intestinal sacculation. No sexual organs nor traces 

 of geinmation." 



Sketches of 2 ventral sette and of an entire worm with small proboscis accompany the note. 



Pristina leidyi Smith. 

 Prislijin Iriiliji Smith. Bulletin Illinois State Laboratory of Natural History, vol. iv, 1896, p. 397. 



This species is represented in both collect inns by almut 25 specimens which agree closely with 

 Smith's description, though in all of them tin- sit.i ^.i the lii,-t LMorsal fascicles lack the spines present 

 on all others, a distinction not mentioned in tlu' original .Itsiiipti.in. In the second bundle some of 

 them often have a length of 5 or 6 times the diameter ot the body. The budding zone occurs at XIII 

 or XIV. 



Besides those taken at New Baltimore. Mich., on several occasions during August, 1893, a few 

 specimens occur with other naids in the material from each of the following Lake Erie stations: 

 Lemna Pond, South Bass Island, Ohio (18f(), July 7, 1899; swamp near East Point, South Bass Island, 

 Ohio, August 2, 1899; Sandusky, Ohio, West Harbor (207a), August 8, 1899. 



Nais elinguis Miiller. 



Nais elinguis, Vejdovsky, System u. Morphoiogie iler Oligochaeten, p. 28, 1844. 



All of the examples of Xdix in the collection are tentatively and with much doubt referred to this 

 species. Although taken at a number of stations, but 1 or 2 usually much broken and distorted 

 examples occur in each lot, and these differ considerably in appearance. Some, for example, have 

 cous|iicniiusl\ |.iL;iiiciitc(l eyes and otlieis [insscss little or no pigment. Ward has labeled some of the 

 New I'.alliiii.iii- ^|H'ciiii(.|is .N'. ,/,.,, /ins anil Sinitli has recorded this species as abundant in Illinois. 

 Their aleiiiiliiaiion lias liccn pciinittcd In ouiwciuili my doubts. The dorsal set« of every specimen 

 exaiiiineil carefully differ in form from those figured by Vejdovsky and other.s. The few budding 

 specimens have the growth zone at XVII to XIX and the fully formed bud has about 21 segments. 

 No sexual individuals were detected. 



Specimens were taken among algfe in association with Slylaria lacustris at New Baltimore in July, 

 1893, at Bound Lake July 16, 1894, and at the following stations in Lake Erie: East Harbor, August 5, 



1898, in Chara; (36a) Squaw Bay, July 12, 1899, among bryozoans; (38o) Put-in Bay, Ohio, July 10, 



1899, bottom tow; (207a) Sandusky, Ohio, West Harbor, August 8, 1899; (212a) Sandusky, Ohio, 

 August 8, 1899, from Utricularia in East Harbor. 



