56 [February, 



hibited no regularity of structure. The Filarice were situated between the 

 globular bodies and the walls of the sacs containing them. 



161. FiLARiA ATTENUATA? Rud. Body Cylindrical, conical at the extremities. 

 Head convex ; mouth round, unarmed. Caudal extremity of male incurved. 

 Tail short, obtusely conical. Length of female 4 inches, breadth J of a line ; 

 length of male 2 inches, breadth one-fifth of a line. 



Five specimens were obtained by Prof. Baird from the abdominal cavity of 

 Sturnella ludoviciana. 



Two female Filarice having the same form as the above, 5 inches in length and 

 i a line in breadth, were obtained by Prof. Baird from the adominal cavity of 

 Colaptes auratus. 



162. FiLARiA BiSPiNOSA Dicsing. 



Filarice Boce constrictoris Leidy, Pr. A. N. S., v, 118. 

 Found beneath the skin of the Boa constrictor. 



163. FiLAKiA ciSTUDiNis. Body capillary, spirally involute, attenuated at the 

 extremities. Head and tail obtusely rounded. Mouth unarmed. Anus termi- 

 nal. Length li inches, breadth ^ of a line. 



One specimen was obtained by Mr. Schaf hirt from the heart of Cistudo Carolina. 



164. FiLARiA AMPHiuMiE. Body cylindroid, attenuated towards the extremi- 

 ties, spirally coiled, anteriorly truncate, posteriorly acute. Length 6 lines, 

 breadth one-fifth of a line. 



Numerous specimens were found coiled up in the parietes of the stomach of 

 Amphiuma raeans, the individual of which had been so long preserved in alcohol, 

 that the characters of the worms could be partially determined only. 



165. FiLARiA NiTiDA Leidy. Body filiform. Mouth large, round, unarmed ; 

 oesophagus one-fourth the length of the body ; intestine straight, capacious, with 

 a short narrow rectum ; anus terminal with a short tubular prolongation. Tail 

 sub-distinct, conical. Color red. Length to 5 lines, breadth one-twelfth of a 

 line. 



Found coiled up in oval cysts in the peritoneum and abdominal muscles of 

 the Kami pipiens. 



166. FiLARiA SOLITARIA Leidy. Mouth transverse, sub-elliptical, papillated. 

 Caudal extremity obtusely rounded. Anus terminal. Length to 2 inches, 

 breadth ^ of a line. 



Coiled up in cysts between the tunics of the stomach and intestines of Fmys 

 strrata and Chelonura serpentina. Obtained by Mr. Joseph Jones, in Georgia. 



167. FiLARiA RUBRA Lcidy. Capillary, anteriorly truncated, posteriorly ob- 

 tusely conical, dark brownish red in color. Mouth transverse, slightly bilabiate ; 

 lips papillated. Anus terminal, transverse, crescentic. Length to 4i inches, 

 breadth \ of a line. 



Frequently found in considerable number in the peritoneal cavity of Labrax 

 lineatus, during the winter. 



168. FiLARiA QUADRiTUBERCULATA Leidy. Body capillary, red in color, ante- 

 riorly conical, unarmed ; mouth circular, with an elevated, non-papillated, 

 circular lip. Caudal extremity incurved, conical, ending in a minute conical 

 papilla, and having on each side a pair of minute tubercles. Length 4 inches, 

 breadth J of a line. 



A single specimen was found by Mr. Schaf hirt in the muscles of the back of 

 Anguilla vulgaris. 



169. GoRDius VARius Leidy. 

 Pr. A. N. S., V, 262, (1851). 



Gordius aquaticus of American authors. 



Gordius tricuspidatus ? Siebold, Zeits. f. Wiss. Zool. vii, 143 (1855). Body 

 long, linear, cylindrical, attenuated towards the extremities ; narrowest ante- 

 riorly ; passing through a variety of shades from a dusky yellowish white or 



