RESKARCHES IN HELMINTHOLOGV AND PARASITOLOGY. I97 



I mm. Dr. H. C. Chapman informed me that he had previously 

 observed this parasite in the squid. 



Monostomum obsciiriim. — Elongated elliptical, flattened, obtusely 

 angular in front, obtusely rounded behind. Oral and genital or 

 other apertures scarcely distinguishable. Length, 4 to 8 Hues ; width 

 I line. 



Numerous specimens in the stomach of a Jew-fish, Mcga/ops 

 t/nissoides. Collection of the Army Medical Museum, Washington. 



Dhtomum Aquihe. — Spatulate, cochleariform, widest behind, ob- 

 tuse at both ends ; mouth circular, unarmed ; acetabulum sessile, 

 about as large as the mouth. Length, 3 lines ; width in front, Y^ a 

 line ; behind, 4-5 of a line. Two specimens from the trachea of the 

 Bald Eagle, Haliwhis Icucoccphahis. Collection of the Army Medical 

 Museum. 



Distomum hispid uiii, Abildgaard. Body much attenuated in ad- 

 vance, covered with minute recurved spines, which become obsolete 

 at the back part. Head with a pair of alate appendages covered 

 with stronger recurved spines, and a small group in the intervals 

 before and behind. Mass of eggs giving the axis of the body behind 

 a red appearance. Ova oval, 0.4 mm. long, 0.24 mm. broad. 



Numerous specimens about 4 lines long by 0.5 mm. where widest 

 behind. From the intestine of the Sturgeon, Accipefiscr sfurio, of 

 the Delaware river, at Philadelphia. 



Nitzschia elegans, Baer. — Several specimens of this leech, four 

 lines long, were taken from the gills of the same sturgeon. 



[February. 1887. No. 544. See Bibliography ] 



Parasite of a Hat. — Dr. Leidy remarked that it was a common 

 opinion among country people that swallows and bats were infested 

 with bed-bugs, and often introduced them into houses. He had 

 convinced himself that the Cimex infesting the cliff-swallow was a 

 different species from the bed-bug ( Proc. 1877, 284). He had re- 

 peatedly examined bats without finding Cimex. On one of two 

 small bats from Panama Bay presented this evening by Dr. Wm. H. 

 Jones he found two singular insects, which appear to be the Polyc- 

 tencs fuinarius described by Prof. Westwood from a bat of Jamaica. 

 They are about half of the size given for the species, but otherwise 

 appear to agree in all respects. It has four jointed antennae, with 

 the first pair of limbs short and the other pair long. The insect has 

 distinct hemiclytra. 



