580 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 58. 



DESCRIPTIONS OF SPECIES. 



NEMATODIRUS FILICOLLIS (Rudolphi. 1802) Ransom. 1907. 



Plate 31, fig. 18 ; plate 33, fig. 24. 



1802. Ascaris filicolUs Rudolphi, 1802a, pp. 23-25, pi. 1, tig. 1, a, b, c (from 



Oris aries; Germany). 



1803. Strongylus filicolUs (Rudolphi, 1802) Rudolphi, 1803o, pp. 17-18. 



1803. Fusaria filicolUs (Rudolphi) Zeder, 1803o, p. 110 (Ascaris filicolUs Ru- 

 dolphi, 1802, renamed). 

 1907. Nematodirus filicolUs (Rudolphi) Ransom, 1907fc, p. 4. 



/Specific diagnosis. — Nematodirus: Species small. Male, 10 to 15 

 mm. long and 125 to 150 \i. in maximum diameter. Bursa rela- 

 tively large with thin rays. Dorsal lobes of bursa not set off from 

 lateral lobes. Bosses large and elongated. Spicules 0.6S to 0.95 mm. 

 long, provided with sharply pointed terminal piece. Esophagus 0.4 

 to 0.6 mm. long, somewhat longer in the female than in the male. 

 Female 15 to 20 mm. long. Vulva located between anterior two- 

 thirds and posterior one-third of body. Anus 70 to 80 {x from 

 truncated posterior end. Eggs 130 to 200 ^j. by 70 to 90 [x, with 

 smooth shell of nearly uniform thickness. 



HaHtat.SmfiW intestine of sheep, cattle, goats, and deer. 



Distribution. — Europe and America. 



NEMATODIRUS ROSCIDUS Railliet, 1911. 



1911. Nematodirus roscidus Railliet, 1911, in Brunipt, 1911, pp. 907, OOS 

 (in stag ("cerf"); France). 



Specific diagnosis. — NeiJiatodirus: Species small. Male, 9 to 14 

 mm. long. Spicules, 0.90 to 0.925 mm. long, with slender lanceolate 

 terminal membrane. Medio-lateral and postero-lateral rays of bursa 

 well separated. Dorsal lobes not salient. Female, 12 to 18 mm. 

 long. Eggs, 160 to 226 jx by 80 to 90 ix ; surface of eggshell alveolate. 

 (Foregoing description taken from Railliet and Henry, 1912.) 



Eahitat. — Intestine of stag. 



Distribution. — France. 



NEMATODIRUS SPATHIGER (Railliet, 1896) Railliet and Henry, 1909. 



Plate 29, figs. 2-14; plate 30, figs. 15-17; plate 32, fig. 21; plate 33, fig. 25; 

 plate 34, fig. 26. 



1896. Strongylus spathiger Railliet, lS96/n, p. 490 (in Camelus drome-\ 



darius; France). 



1909. Nematodirus spathiger (Railliet) Railliet and Henry, 1909a, p. 87. 



Specific diagnosis. — Nematodirus: Medium-sized species. Mais. 



10 to 15 mm. long and 125 to 175 ^ in maximum diameter. Bursa 



relatively small. Dorsal lobes set off by indentations from lateral 



