144 



THE FUR SEALS OF THE PRIBILOP ISLANDS. 



Die bekannten Formen, welcher hier iu Frage kommeu konnten, sincl Ascaris osculata, decipiens 

 und similis welche von dieser Form darchaus verschioden sind, wie aus Krabbe's neuester (1878) 

 Darstellung der in Robben und Walen gefnndenen Ascaris-Arten ersichtlich ist. 



No other original observations have been made upon this parasite. 



B. The ventro-lateral lips, said to bear a papilla armed with 6 to 7 small teeth [=dentigerous ridge on 

 a bilobed projection?]. 



6. ASCARIS KUKBNTHALII Cobb, 1888. Sp. inq. 



(Figs. 58-64.) 



9 1809, Asoaria simplex Rudolphi, see page 121. 



1888, Ascaris Kiikenlhalii Cobb, Jenaische Zeitschr. f. Naturw., XXIII (n. F. XVI), i, Dec. 8, 1888, pp. 

 44-59, pis. in, figs. 1-11, iv, 12-30.— Cobb, 1889, Archiv f. Naturg., 55 Jhg., I, pp. 149-150, 

 pi. VII, figs. 4-6. — Stossich, 1896, Boll. Soc. adriatica Sci. nat., XVII, p. 53. 



1894, Asearis Eukenthalii Cobb, as probable synonym of A. simplex Rud., JagerskiOld, Zool. Jahrb., 

 VII, pp. 474-476. 



Diagnosis. — Intermediate lips absent; lateral cervical alae absent; head (male) scarcely 0.33"""' 

 broad, lips of nearly equal size; lobes not mentioned; dentigerous ridge not mentioned, but one 

 papilla on each ventro-lateral lip said to bear teeth ; dorsal lip bears a symmetrical pair of papillae, 

 the ventro-lateral lips said to possess 3 papillae each; an upper one [double lobed projection?] with 

 6 to 7 teeth, a lower one on which no teeth were visible, and a very small one about in the middle of 

 the inner side; cervical papillae 1""" from the head. Excretory organ discharges between the 

 ventro-lateral lips. Body attenuated toward both extremities. Transverse cutioular bands 30 /<. 

 Oesophagus composed of two portions ; anterior portion 5""" long by 1""" in diameter (distal end) ; 

 posterior portion 2 to 2.5™'" long, generally sigmoid ; caeca apparently absent. 



Male : 70 to 90""" long by 2 to 3™"" thick ; tail with lateral alae ; 7 to 8 pairs of postanal papillae ; 

 1 to 4 near the tip ; 5 to 8 near the cloaca, of which 6 and 7 are doijble ; about 90 pairs of praeanal 

 papillae extending about 10""" forward from tip of tail ; of these 6 to 10 pairs of short papillae lie 

 antero-lateral of the cloaca ; then follows cephalad on each side a row of longer papillae ; apparently 

 two median papillae immediately in front of the cloaca; left spiculum (2.3""") slightly larger than 

 the right (1.7"'"'). 



Female : 80 to 100"™ long with maximum breadth of 2.5'"™ ; vulva a little anterior to middle of 

 the body. Eggs reach the morula stage in the uterus. 



Habitat : Stomach of marine animals. 



HiSTOEiCAL Review. — This species was described by Cobb, but Jagerskiold 

 thinks it probably identical with A. simplex. In detail the history of the species is as 

 follows : 



Asearis Kukentlialii, collected by Kiikenthal, August, 1886, from the stomach of 

 Beluga leucas [=I>elphinapterus leucas) in the Advent Bay (West Spitzbergen), was 

 described as a new species by Cobb (1888, pp. 44-59). While his anatomical discus- 

 sion is excellent, he omits some extremely important points of systematic value; 

 appa;rently he was not acquainted with Krabbe's work upon the parasites from this 

 host. 



He describes the male (fig. 58) as 70 to 90"""" long, by 2 to 3"™ broad: head 

 scarcely 0.33""" broad; body attenuate anteriorly, and very slightly pointed pos- 

 teriorly; tail is curved and provided with a bursa; the papillae are figured (fig. 61) 



