ASCAKIS SIMPLEX. 



121 



1851, Ascaris anguUralvis Cbeplin, Arch. f. Naturg., 17 Jhg., I, pp. 158-160.— Diksinc, 1860, SitzungBber, 

 k. Akad. Wiss. Wien, XLII, No. 28, pp. 656-657. 



1878, Ascaris simplex Eudolphi, of Kkabbe, Oversigt k. Danske Videnskab. Selskab Forhand., 1878, 1. 

 T)p. 47-49, fig. 2, pi. I, fig. 4, re'suraiS, p. 12.— VoN Linstow, 1888, Report H. M. S. Challenger, 

 Zool., XXIII, part lxxi, pp. 2-3, pi. i, figs. 1-4.— Beaun (1891), Arch. d. Fr. d. Naturg. i. M., p. 

 110.— JagbrskiOld (1891), Biol. Foren. Forhandl., Stockholm, III, No. 7, p. 132.— JXgbrs- 

 kiOld, 1894, Zool. Jahrb., vii, pp. 474-476, pi. xxviir, fig. 42.— Stossich, 1896, Boll. Soo. adri- 

 atica Soi. nat., XVII, p. 17. 



? 1889, Ascaris Kiikenthalii Cobb, see p. 144. 



Diagnosis. — Intermediate lips absent ; lateral cervical alae absent ; lips of nearly equal size 

 (Krabhe), or (von Linstow) dorsal lip (0.12'"™) smaller tban ventro-lateral lips (0.30""") ; lips with two 

 anterior lobes, constricted from the base, and armed on their inner surface with a dentigerous ridge; 

 cervical papillae. Body attenuated more toward the anterior than toward the posterior end. Cutic- 

 ular bands 23 jn broad, with finer striae about one-eighth as broad ; lateral lines 0.23 /i broad, dorsal 

 and ventral lines 35 /i. Oesophagus composed of two portions; anterior portion increases gradually 

 in diameter; posterior portion begins with a swelling and then decreases; caeca absent. 



Male: 37 to 130""' long by 0.9 to 2.5"'"' in diameter; tail with lateral alae about 2.5""" long; 6 to 

 8 pairs of postanal papillae; of these, 4 pairs are near the tip, the outer pair being the longest; the 

 other 2 or 3pair8 are shorter and nearer the anus; 50 or more (pairs?) praeanal papillae; of these, 6 

 pairs of shortly pedunculate papillae lie antero-lateral of the cloaca; then follows cephalad on each 

 side one row of long papillae, or two rows which are closely approximate; spicules long (1.68™""), with 

 saber-like curvature (Linstow). 



Female: 79 to 200""" long by 2.2 to 2.75"'"" thick; vulva three-sevenths the length from the ante- 

 rior end (Linstow), about one-half (36 : 72 and 70 : 150) the length from the anterior end ( Jagerskiold). 

 Eggs spherical, 52 j.i with roundish elevations. 

 Habitat : Stomach of marine mammals. 



Host. 



Locality. 



Collector. 



Authority. 



lyalaenoptera roetrata,.. 

 Salaenoptera roetrata . 

 Balaenoptera roatrata. . 

 Balaenoptera sibbaldii. 

 Delphvna/pterus leucas . 

 Delphinapterus lettcas . 



Delphvmia sp 



Hyperoodon roetratue 



Lagenorhynchus albvrostris . 



Monodon imonocerog 



Mmiodon monoceros 



Otaria jubata 



Phocama phoecena'^ 



Phocmna phocisna^ 



Plantttmifita gangetica^. 

 Porpoise, gen.! sp.?"... 



Koren . 

 Koren . 



Specimensfrom Sparre 



Greenland 



Sepecimens from Lev- 



iiisen of Copenhagen 



Patagonia 



Faroe 



Denmark 



Greenland 



Specimens from Steen- 



stiup. 

 Kerguelen Islands 



Schneider of Tromso . 

 Olrik, Pfaff, Andersen 



Chierohia 



Snenson 



Ihsen, Keinhart.. 

 Olrik, Pfait 



Challenger expedition 



Chiloe Island . 



Albers 



Anderson 



Daiwin, 1835. 



Creplin, 1857, pp. 158-160.1 

 Kraljbe, 1378, p. 12. 

 Jagerskiold, 1894, p. 475. 

 Jagerskiold, 1894, p. 475. 

 Krabbe, 1878. p. 48. 

 Jagerskiold, 1894, p. 475. 



Honticelli, 1889, p. 69. 

 Krabbe, 1878, p. 48. 

 Erabbe,1878,p.48. 

 Krabbe, 1878, p. 48. 

 Diesing, 1860, p. 657. 



Linstow, 1888, p. 2. 

 Krabbe, 1878, p. 48. 

 Biidolpbi, 1809, p. 170. 

 Cobbold, 1876, p. 297. 

 Cobbold, 1886, p. 176. 



1 Kecorded as AscoHs a/nguUvalvia. 



*In need of verification, see p. 124. 



Summary. — Our first exact statements regarding this species we owe to Krabbe 

 (1878), who determined certain worms from toothed whales as Ascaris simplex Eudolphi, 

 and upon examination of material collected by Koren, a part of which was described by 

 Oreplin (1851) as A. angulivalvis, determined the latter form as identical with the former. 

 We have at present absolutely no exact knowledge of the forms determined as A. simplex 

 prior to the appearance of Krabbe's work, and some of the later determinations are 

 exceedingly doubtful. The exact status of A. delphini, quoted by most authors as a 

 synonym of ^. simplex, can not be ascertained (see p. 162), but further investigation 



