ASCARIS SIMILIS. 



147 



Female (inalo?): About 37""" loug by 1.5""" broud; spirally twiatod iu many cou volutions; of 

 a dark-olive color. 



Types: In British Museum. 



Habitat : Stomach of marine mammals. 



Host. 



Locality. 



Collector. 



Autliority. 



Antarctic seal, gen.? sp. ? 



Antarctic. 



(?) 



Baird, 1853, p. 19. 





Historical bevibw. — This form was described by Baird in 1853, and has not 

 been found or examined since that time. Professor Bell writes to ns that the tyi^es 

 are in very poor condition. Baird's (1853, j). 19) original diagnosis reads as follows — 



ACARIS SIMILIS, Baird. 



Fig. 65. 



Fig. 66. 



Length of male 2 inches, breadth 1 line. Length of female li^inche.s, breadth three-fourths of aline. 

 Anterior portion much narrower than posterior. Head small, mouth with three small valves slightly 

 projecting beyond the margin. Tail rounded, thick, obtuse. . Females spirally twisted in many con- 

 volutions, of a dark-olive color. Male straight to within a short distance of tail, which is inflected; 

 of a whitish color. Skin minutely and Jinely striated across. Wing extending along the whole length 

 and becoming thicker and stronger at inferior extremity. Differs from preceding species (A. osculata) 

 in having the wing stronger and thicker at inferior extremity, in having the head and mouth smaller, 

 and having the skin finely striated across. 



Habitat: Stomach of a seal from Antarctic regions. 



Collected during the late Antarctic expedition. Presented by the Admiralty. 



Baird's figures show that the intermediate lii)S are absent; his figure la, of a sup- 

 posed male, is j)robably a female, while Ic, of a supposed female, is i)robably a male. 

 In his second paper Baird ( 1853, p. 18) repeats his original diagnosis, with some slight 

 verbal changes. The diagnosis in his third paper (1855, pp. 69, 70) is a reprint of the 

 diagnosis given in the second paper. 



Neither Diesing (1860, p. 656), von Linstow (1878, p. 44), nor Stossich (1896, p. 63) 

 add any original observations. 



8. ASCARIS HALICORIS Owen in Baird, 1859. 



(Figs. 70-75.) 



(1833), Ascaria halichoris Owen, Catalogue of the Physiological Series of Comparative Anatomy, 

 Museum of the College of Surgeons, p. 121, London. Nomen nudum. (Quoted from Baird, 

 1859.) 



(1834), ? RtJppELL, Abhandl. Seukenberg. Museum, I, p. 106. 



1838, "Ascai-ides" in Dugong Owen, Proc. Zool. Soc. London, Part VI, p. 30. 



1839, "Ascaris of a Dugong," Owen, Art. Entozoa, Todd's CyclopsBdia of Anatomy and Physiology, 



II, p. 136. 

 1851, Aacaris dugonis Diesing, Syetema Helminthum, II, p. 191. Nomen nudum. Refers to Riippell, 

 1834. 



