58 CONTRIBUTIONS TO AMERICAN HELMINTHOLOGt. 



organs answer -well to Olsson's description of D. ferox ; the eggs, 

 however, measure 0.096 mm. x 0.069 mm., while the following are: 

 measurements giyen for D. ferox : 



0.092-0.102 mm. x .049 mm. (Dujardin); 

 0.06 mm. x 0.04 mm. (Olsson). 



The penis, exserted in all my specimens, is smooth, and measures 

 about 2 mm. in leng-th. 



The pharynx is pistilHform; the intestine bifurcates 2.08 mm. 

 from the anterior end, and is very easUy distinguishable from its 

 dark brown contents (probably broken down epithelium and blood 

 corpuscles). 



3. — DiSTOMTJM RETIOTJLATUM, «. Sp. 



The Assistant Curator of the University Museum, while preparing 

 a specimen of the Belted Kingfisher (Ceryle alcyon, Boie) in April, 

 found two Trematode worms " on the surface of the lung," which 

 present in. many respects a remarkable resemblance to D. hepaticum, 

 L. I believe them to be hitherto undescribed, and I propose for them 

 the specific name " reticulatu.ni," referring to the beautiful network 

 formed by the branching and anastomosing testicular tubes shining 

 through the translucent testicular area. 



Description (Fig. 6). — Body ovate, flat, or slightly concave ven- 

 trally, separated by a constriction and by a large and projecting 

 acetabulum from the upturned neck. Total length, 14 mm. ; greatest 

 breadth, 8 mm. Entirely covered with recurved rounded 0. 025 mm. 

 long spines, which are closer and smaller on anterior part of neck. 

 Anterior sucker bowl-shaped, 0.9 mm. wide. Acetabulum 1.3 mm. 

 diameter, orifice circular. Pharynx oval, thick- walled, 0.48 mm, 

 wide. Intestinal coeca unhranched (?). Bifurcation shortly behind 

 pharynx. Genital orifice immediately in front of acetabulum. Penis (?), 

 Uterine gyri overlying and extending behind the acetabulum. Testes, . 

 in the form of branched tubes, occupying a translucent oval area, 

 with black borders narrower posteriorly, formed by the vitelligenous 

 glands, which are disposed in a racemose manner round a dorsal and 

 a ventral longitudinal stem on each side. Eggs average 0. II mm. 

 X 0.065 mm. 



The above description contains most of the points which can be 

 observed by studying this worm entire by the aid of a compressorium. 

 Probably slicing will give better results as to the disposition of the. 

 genital apparatus and intestinal coeca. The ease with which the 



