. The fur seals and fur-seal islands of the North Pacific ocean. Sealing; Seals (Animals). ASCARIS SIMPLEX. 125 Dujardin's description {=A. Dussumierii) he still retains under the name " Pig. 25. l^; In a later publication Oobbold (1886, pp. 176,177) mentions some ascarides which Charles Darwin collected " from stomach of a porpoise off the island of Ohiloe, January, ; There were thirteen specimens, mostly females, the longest of which did not exceed 3 inches. These Oobbold determined as "A. simplex," again stating that A. delphini found by Lebeck belong
. The fur seals and fur-seal islands of the North Pacific ocean. Sealing; Seals (Animals). ASCARIS SIMPLEX. 125 Dujardin's description {=A. Dussumierii) he still retains under the name " Pig. 25. l^; In a later publication Oobbold (1886, pp. 176,177) mentions some ascarides which Charles Darwin collected " from stomach of a porpoise off the island of Ohiloe, January, ; There were thirteen specimens, mostly females, the longest of which did not exceed 3 inches. These Oobbold determined as "A. simplex," again stating that A. delphini found by Lebeck belonged to the same species; this view he "coilfirmed from an examination of nematodes procured from a Platanista gangetica^ by Dr. John Anderson," and he thinks "it probable that the Ascaris found by Krefft and Masters in a dolphin captured in Port Jackson is of the same species. If so, the worm occurs in DelpMnus phocaena, in 1). Forsteri, and in Platanista gangetica, and probably in the dolphins generally. * * * The ova from Mr. Darwin's specimens are nearly spherical, furnished with thin, transparent (;horional envelopes. They give an average diameter of ^q of an inch from pole to pole. M. Dujardiii, whose descrip- tion of the species is the best on record, found the eggs to be a trifle ; In his bibliography of this worm Oobbold does not cite Krabbe's paper. It is evident from Cobbold's discus- sion that at no time had he any clear idea of the worms he was attempting to describe; and all of his statements con- cerning them should be either preceded with a prominent mark of interrogation or rejected in toto. Leidy (1886, p. 311) next recorded "Ascaris simplex Eudolphi from the stom- ach of a dolphin, Lagenorhynchusf Pacific ocean," but as we show on page 134 of this report, hjs specimens belong to Ascaris typica. Von Linstow (1888, pp. 2, 3) appears to be the next zoologist to examine A. simplex. He records it "from the stomach of Otaria
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