ASCARIS HALICORIS. 



151 



eud of the tail ; Paroua, ou the other hand, found the striation of the male present ou 

 the tail as well as ou the other portions of the body. 



Unfortunately Parona's figures of the tail of the male are rather unsatisfactory. 

 He states that the tail is spirally wound; that the spicules are short, not protruding 

 more than 2""", and that five symmetrical jiairs of papillae are present. Judging 

 from his figure, four pairs of these papillae are praeaual and one pair postanal. 



Fig. 74. 



Fig. 75. 



Stossich (1896, p. 68) places Ascaris halicoris among the doubtful species ; his diag- 

 nosis is evidently based upon Parona's work, and he cites both Halicore indica and 

 Bhytina stelleri as hosts. 



II. Intermediate lips present. 



9. ASCARIS OSCULATA Rudolphi, 1802, det. Schneider, 1866. 

 (Figs. 76-92.) 



? 1802, Ascaris osculata Eudolphi, Arch. f. Zool. und Zootomie, II, ii, pp. 14, 15. — Rudolphi, 1809, 

 Entozoorum hist, nat., II, i, pp. 135-136. — Rudolphi, 1819, Entozoorum synopsis, pp. 39, 

 651-652. — Bkllingham, 1844, Ann. and Mag. Nat. Hist., XIII, p. 169. — Dujardin, 1845, Hist, 

 nat. des Helminthes, p. 164. — Diesing, 1851, Systema helminthum, II, p. 169. — Baird, 1853, 

 Cat. Entoz. Brit. Mus., p. 18.— Bastain, 1866, Phil. Trans. R. Soc. London, CLVI, pp. 545-638, 

 pi. XXVI, figs. 6-12. 



? 1803, Fusaria osculata (Rudolphi, 1802), Zedek, Anleitung z. Naturg. Eingeweidew., p. 105. 



1866, Ascaris osculata Rudolphi, 1802, of Schneider, Monographie d. Nematoden, p. 44, with fig.,. pi. i, 

 fig. 13. — Krabbe, 1878, Oversigt K. Danske Videnskab. Selskabs Forhand., p. 45, pi. i, fig. 1. — 

 CoBBOLD, 1879, Parasites, pp. 313, 314, figs. 59a-b. — Von Linstow, 1880, Arch. f. Naturg., 

 46 Jhg., I, pp. 44, 45.— VON Marenzeller (1882-83), Internat. Polarforsch. Wien., p. 18. — 

 Nehring, 1884, Sitzungsber. Gesellsch. naturf. Freunde Berlin, no. 4, p. .59. — Braun (1891), 

 Arch. d. Fr. Naturg. i. M., p. 110.— Jagerskiold (1893), Akadem. Afhandl. Stockholm, pp. 10- 

 16, pis. II, fig. 12, IV, 35, V, 39. — Von Linstow, 1892, Jahr. Hamb. wiss. Anstalten, IX, 2, pp. 

 8, 9, pi. II, figs. 11-16.— Jagerskiold. 1894, Zool. Jahrb. VII, pp. 457-463, pis. xxv, fig. 12, 

 XXVII, 35, 36, XXVIII, 38. — Von Linstow, 1895, Archiv. f. mikr. Anat., XLIV, pp. 528-531, 

 pi. XXXI, figs. 1-14.— Stossich, 1896, Boll. Soc. ardiatica Sci. nat. Trieste, XVII, pp. 37-38. 



Diagnosis. — Intermediate lips present; lateral cervical alae absent; lips large, of about equal 

 size, with an inner lateral dentate projectiou, but without dentigerous ridge. Immediately back of 

 the head for about 0.13""", the anterior border of the each cuticular ring covers the posterior border 

 of the ring immediately in front ; beyond this peculiarly formed differentiation the posterior margin 

 of each cuticular ring covers the anterior margin of the next ring. Cuticular bands 8 m broad 

 without finer striation. Oesophagus composed of two portions; distal portion generally with caecal 

 appendage; oesophageal and intestinal caeca present. 



Male: 34 to 70'""' long by 1.5'"'" in diameter; tail hooked or curled ventrally, with narrow or 

 broader alae; 8 to 11 pairs of postanal papillae; of these 1 to 4 are near the tip; one pair of double 

 papillae and several (3 or more) pairs of single papillae nearer the cloaca; 30 or more pairs of 

 praeanal papillae arranged on each side somewhat irregularly or in two rows; spicules equal 3,7'""' 

 (von Linstow), 6 to 8™"' (Stiles and Hassall) long. 



