C24. [June, 



found them elsewhere, less shy than those of any other species. They seek out 

 little pools or mud puddles near the river, to which they resort to feed more ha- 

 bitually than their congeners; and here they are without difficulty approached 

 and shot. 



Cygnus, Li7i7i. 



62. C. BUCCINATOR, Rich. Trumpeter Swan. 



In Texas, I at times saw flocks of this swan at great heights, and heard their 

 wild, melancholy note, as they liesurely yet swiftly winged their way through 

 the upper air. 



Anas, Linn. 



The following species I found every where that water was found, in the plains 

 or among mountains, between San Antonio and the Rio Grande a distance, as the 

 crow flies, of over 400 miles. In the midst of extensive plains, I scarcely ever 

 approached a " water-hole" (or rain water pond) in which I did not find small 

 flocks of one or more species. 



63. A. BOSCHAS, Lin7i. Mallard Duck. 



64. A. STREPERA, Linn. Gadwell Duck. 



65. A. Americana, Gmel. Widgeon or Baldpate. 



66. A. Carolinensis, Steph. Green winged Teal. 



67. A. DiscoRS, Linn. Blue winged Teal. 



68. A. clypeata, -^iww. Shoveller Duck. 



The last, however, I saw only at San Elizario; where also, and generally along 

 the Rio Grande and Rio Puerco, and their mountain branches, nearly to the fool 

 of the Sierra delos Mimbres, I found most of the others which shows their ex- 

 tensive range. 



The Committee on Dr. Leidy's " Additional Contributions to Hel- 

 minthology," reported in favor of publication in the Proceed- 

 ings. 



Helmintkological Contributions. No. 2. 

 By Joseph Leidy, M. D. 



Aspidagaster, Baer. 



Aspidagaster conchicola. Saer, Act. Acad. Nat. Cur., T. 13, p. 527, 

 Dujardin, Hist. Nat. des Helm., p. 324; Diesing, Syst. Helm., Vol. 1, p. 414. 



Body oval, posteriorly obtusely rounded; color yellowish white. Neck trans- 

 lucent, cylindric ; mouth terminal, large, surrounded by a thick, contractile lip. 

 Lateral margin of ventral disk crenate. 



Measurements at rest. Length i to 4-5ths of a line by Mo ^ of a line broad. 

 Neck i length of body, by l-9th line in breadth. (Esophageal bulb longitudi- 

 nally oval, l-166th in. long by l-285th in. broad. Ovum oval, l-333d to l-285th 

 in. long, by l-666th to l-500th in. broad. 



Measurements in action. Length 1 to la lines by l-5th to i line broad. Neck 



