ASCARIS TYPICA. 



127 



3. ASCARIS TYPICA (Diesing, 1860) JagerskicJld, 1894. 



(Figs. 30-51.) 



? 1845, "Jscaris simplex RuDOLPHi, 1809," of Du.iurdix, see p. 161. 

 1860, Conocephahis ti/picua Diesing, Sitzungsber. k. Akad. Wiss. Wieii, XLII. No. 28, p. 669. — Von 



LiNSTOW, Coiupendinm : d. Helmintliologie, p. 59.^ — Carus, 1863, in Peters, Carus & Ger- 



staecker, Handbuch der Zoologie, II, p. 462. 

 ?1870, Ascaris Diissumierii Beneden, see p. 161. 

 1878, Ascaris conocephahis Krabbe, Oversigt K. Danske Videnskab. Selskal)8 Forhand., 1, pp. 49-51, 



flg. 3, pi. I, fig. 5, resume p. 12. 

 1889, "Ascaris conocephala Krabbe," in von Linstow, Compendium : Nachtrag, pp. 25, 26. — Srossicir, 



1896, Boll. Soc. adriatica Sci. nat. Trieste, XVII, pp. 17-18. 

 1883, Periirachelius typicus (Diesing, 1860) von Drasche, Verhandl. k. k. /ool.-bot. Gesellsch. VVieu, 



XXXIII, pp. 109-111, pi. Ill, figs. 1-9. 

 1886, "Ascaris simplex Rudoi.phi," misdetermined, Leidy, Proc. Acad. Nat. Sci. Pbila., p. 311. 

 1894, Ascaris (Feritrachelins) typicus (Diesing, 1860) Jagerskiold, Zool. .Jabrb., VII, p. 453. 



Diagnosis. — Intermediate lips absent ; lateral cervical alae absent ; lips with very different outline 

 and with deiitigerous ridge : dorsal lip with basal portion 0.16 to 0.2""" broad by 80 to 88 /i long, which 

 is divided into two large lateral lobes, bearing in its median line a prominent anterior double-lobed 

 projection 48 jn long by 48 to 64 jii broad; the latter contains on each side a lobe of parenchyma and 

 on its inner surface a dentigerous ridge; the lateral lobes bear laterallj' what appears to be a very 

 delicate dentigerous ridge, but what is evidently a striation; ventro-lateral lips with large, almost 

 semicircular basal portion 0.16'"™ broad, bearing on the inner surface of the anterior portion a par- 

 tially coucealed double-lobed projection provided with a dentigerous ridge; they bear laterally also 

 what appears to be a very delicate dentigerous ridge, which resolves itself into a striation ; cervical 

 papillae 0.66'"™ from anterior extremity. Body attenuate more toward anterior than toward posterior 

 extremity, which ends conically. Cuticle with cuticular bands 32 /< broad, but apparently without 

 finer striae. Oesophagus composed of two portions: anterior portion 4""" long by about 0.3 to 0.4""" 

 in diameter at di.stal end ; posterior portion 1.25""" long by 0.25'""' in diameter, generally sigmoid ; 

 oesophageal and intestinal caeca absent. 



Male: 31 to 70""" long by 1 to 1.5'"'" in diameter; tail compressed dorso-ventrally with dorsal 

 median rounded keel and with lateral alae. It is curved ventrally and bears numerous papillae ; 9 to 

 10 (occasionally 11) pairs of postanal papillae, of which 1, 2, 3 are conical and near the tip; 4 to 10 

 (11) shorter and nearer the cloaca; 3 and 9, 10, 11 may occasionally be wanting; more than 75 praeaual 

 papillae each side, arranged in three rows; those nearer the cloaca smaller and more irregularly 

 arranged ; cloaca 0.27'"'™ from tip of tail ; spicules unequal, left spicule (3'"™) about three times as long 

 as right spicule (O.ge""™). 



Female: 37 to gO"""" long by 1.5 to 2'""' in diameter; vulva in middle third (generally near 

 middle) of the body. Eggs globular, 40 to 56 ju, segment to morula stage in the uterus. 



Types : Diesiug's types in Vienna Museum ; Krabbe's types in Kopenhagen Museum. Typical 

 specimens (Stiles & Hassall det.) in Coll. Leidy (U.S.N.M. No. 5015); from which specimens will be 

 distributed as follows: U.S.N.M.No. 2813; Coll. B. A. I. (U.S.N.M. No. 2812); Coll. Stiles (U.S.N.M. 

 No. 5456) ; South Kensington Museum, London ; Berlin Museum ; Coll. R. Blauchard, Paris ; Copenhagen 

 Museum; Vienna Museum. 



Habitat: Stomach of marine mammals. 



Hosts. 



Locality. 



Collection. 



Authority. 



Delphinus (Melphig) 



Atlantic Ocean 



Pacific ( )ceau 





Diesing, I860, p. 669. 



Stiles & Hassail, 1899, p. 132. 



Stiles &. Hassall, 1899, p. 134. 



Krabbe, 1878, p. 49. 

 Krabbe, 1878, p. 49. 



Uelphmus sp 



"Vv H J ones 



Phoccena phoccena 



Specimens from Vi- 

 enna Museum. 



Atlantic Ocean 



Atlantic Ocean 





Prodelphinus 





Dolphins gen. ? sp. ? 



Hygom, Iverson, An- 

 drea. 





