Il6 RESEARCHES IX HELMINTHOI.OGV AND PARASITOLOGY. 

 fDecember. 1858. No. 217. See Bibliography] 



Dr. Leidy exhibited specimens of true bone found in the kidney 

 of a mink. It was situated in the fibrous tissue of the organ, the 

 glandular substance of which was wasted away, its place^ being 

 occupied by an enormous para.site, the Siro}/gy/us gigas. 



[January. 1859. No. 219. See Bibliography.] 



Dr. Leidy exhibited a drawing of the worm described by him at 

 a former meeting as Maiiayunkia speciosa. 



Dr. Leidy remarked that perhaps some of the meml:)ers present 

 would recollect he had- some time since (Proc. 1858, p. 90 de- 

 scribed a curious fresh-water worm, Manayioikia speciosa, from the 

 River Schuylkill. It was observed that it appeared to be most 

 nearly allied to the marine genus /v?/^r/V/a. During the last sunniier 

 Dr. L. in company with Mr. Powell sought for the latter at New- 

 port, R. I. They found it in very great abundance at the foot of 

 the cliffs bathed by the ocean. In its curved tubes of tenacious 

 mud, adhering to stones and with its projecting tentacles, it \ery 

 much resembles a ciliated polyp, especially Pli(?)iate//a. 



The worm is about 1)2 lines long, demi-cylindroid, with 12 

 annuli, of which all except the first are setigerous. The cephalic 

 annulus has a short proboscis, is provided with one or two pairs of 

 eyes, and supports 6 arms with about 80 ciliated tentacles. The 

 succeeding 7 or 8 annuli are provided on each side with fascicles of 

 from 5 to 7 setae and as many podal spines. The posterior 3 annuli 

 are provided on each side with fascicles of 2 setae and from 12 to 15 

 short podal spines. Anterior setae terminating in a linear lanceolate 

 blade ; posterior setae aristate. Anterior spines terminating in a 

 hook, which is dentate on its convex border ; posterior spines ex- 

 panded at the extremity, which is dentate on the convex border. 

 Caudal annulus with a pair of eyes. 



Eyes exist in the cephalic and caudal annuli, also in the young 

 worm. From the want of a good description and figures of the 

 European .species of Fabricia, it was not to be determined whether 

 the American species was different from it. 



[February. 1859. No. 232. See Bibliography.] 



Dr. Leidy exhibited specimens of a 'JricJiina found in the nui.scles 

 of a human subject. He stated that he often meets with this para- 

 site, and most frequently in the biceps muscle of the fore-arm : also 

 specimens of a dipterous larvae from man. 



