52 [February, 



124. AscARis ACUTA Muller. 



A single male, 14 lines long and J of a line broad, was obtained from the in- 

 testine of Platessa plana. 



125. AscARis NE6LECTA Leidj. Body cylindro-fusiform, most narrowed an- 

 teriorly. Head naked ; lips large, obtuse. Tail short, conical, acute. Length 

 of female 2 inches, breadtli three-fifths of a line ; male abont half the size. 



Twelve specimens were obtained by Prof. Baird, from the intestine of Diodon 

 maculo-striatus. 



126. AscARis CLATATA Rud. Head with a linear ridge On cach sidc. Tail short, 

 conical, incurved, mucronate ; in the female with a linear ridge extending for- 

 ward on each side. Length of female to 3^ inches, breadth f of a line ; length 

 of male to 2 inches, breadth to J a line. 



Numerous specimens were obtained by Prof. Agassiz from the intestine of 

 Morrhua pruinosa, and I have obtained others from the intestine of Morrhua 

 americana. 



12*7. AscARis CYLiNDRicA Leidy. 



Angiostomum ? cylindricum Diesing, Syst. Helm, ii, 559. 



Ascaris crflindrica Leidy, Pr. A. N. S., iv, 229. Body cylindroid, equally at- 

 tenuated towards the extremities, curved. Mouth distinctly trilabiate. Tail 

 narrow, conical, curved, acute. Female generative aperture just jiosterior to 

 the middle. Length four-fifths of a line, breadth one-twelfth of a line. 



Found in the intestine of Helix alternata. No cartilaginous pharynx as in 

 Angiostovmm I 



128. Ascaris infecta Leidy. 



Pr. A. N. S., iv, 229 ; Faun, and Flora within Liv. An. 42. 

 Found in the ventriculus of Julus marginatus. 



129. Stnplecta pendula Leidy. 

 Pr. A. N. S., V, 240. 



From the stomach of Emys guttata. 



130. OxYiTRis coMPAR Leidy. Body fusiform ; head continuous with the body, 

 subacute, with a dilatation of the epidermis ; mouth small. Tail of female long, 

 subulate, spirally contorted ; the generative aperture one-fifth the length of the 

 body from the head. Length of female 4 to 7 lines, breadth J of a line ; length 

 of tail from the anus 1^ lines. 



Seventeen specimens were found in company with others of Tcenia crasskollis 

 in the small intestine of the cat, Felis catus. QEsophagus long, pestle-form ; 

 gizzard globulo-pyriform ; intestine dilated at the commencement, afterwards 

 cylindrical. Males were not seen. 



131. OXYURIS CCRVULA Rud. 



Litestine of the horse, Equus cahallus. 



132. ? OxYURis DUBiA Leidy. Body fusiform, curved. Head continnons with the 

 body, naked. Mouth unarmed. Female generative aperture about the middle 

 of the body. Tail abruptly narrowed, acutely conical. Length of female li 

 lines, breadth |^ of a line. Male not seen. 



Found in the coecum oi Bufo americanus, and of Salamandra rubra. 



SPIRONOURA Leidy. 



Body cylindroid, attenuated at the extremities. Head continuous with the 

 body. Mouth round, surrounded by a circular papillated lip. Caudal extremity 

 of male spiral, acute, tuberculate, with the two spicula of the penis curved, ensi- 

 form, costate ; of the female conical, acute, with the generative aperture at the 

 posterior third of the body. 



133. Spiroxoura gracile Leidy. Body of female incurved ; that of male spiral 

 posteriorly. Head naked ; mouth with a circular lip of 6 papillae. Tail of female 

 long, calcarate, acute : of male, with two rows each of three tubercles. Spicula 



