ASCARID.E. 19 



7. Ascaris similis, Baird. (Tab. I. f. 1.) 



Length of male 2 inches, breadth 1 line. Length of female H 

 inch, breadth f of a line. Anterior portion much narrower 

 than posterior. Head small, mouth with 3 small valves slightly 

 projecting beyond the margin. Tail rounded, thick, obtuse. 

 Females spirally twisted in many convolutions, of a dark olive 

 colour. Male straight to within a short distance of tail, which 

 is inflected ; of a whitish colour. Skin minutely and finely 

 striated across. Wing extending along the whole length and 

 becoming thicker and stronger at inferior extremity. Differs 

 from preceding species in having the wing stronger and thicker 

 at inferior extremity, in having the head and mouth smaller, 

 and having the skin finely striated across. 



Hob. Stomach of a Seal from Antarctic regions. 



Collected during the late Antarctic Expedition. Presented by the 

 Admiralty. 



8. Ascaris tetraptera. 



Ascaris tetraptera, Nitzsch, Attg. Encyh. copied by Schmalz, Tab. 

 Anat. Entoz. t. 17, f. 10-12; Dufardin, Hist. Nat. Helminth. 

 165. 



Hob. Large intestines (ccecum) of the Wood Mouse, Mus sylvaticus. 

 From the collection of M. Siebold. 



9. Ascaris suilla. 



Ascaris gigas, C. Suum, Goeze, Naturg. 71. 



Ascaris suis, Gmelin, Syst. A T at. n. 24; Schrank, Verzeichn. 6, n. 24. 



Fusaria lumbricoides, c. suum, Zeder, Nachtrag, 25. 



Fusaria lumbricoides, y. suis, Zeder, Naturg. 102. 



Ascaris lumbricoides (part), Rudolph I, Cloquet, dec. 



Ascaris suilla, Dujardin, Hist. Nat. Helminth. 167. 



Hah. Intestines of the common Sow, Sus scrofa domestica. 



From the collection of M. Siebold. 



10. Ascaris megalocephala. 



Ascaris gigas (equorum), Goeze, Naturg. 63, t. 1, f. 1-3. 



Ascaris equi, Gmelin, Syst. Nat. 3032, n. 23 ; Schrank, Verzeichn. 7, 



n. 23 ; Turton, Brit. Faun. 125, n. 5. 

 Ascaris lumbricoides (part), Rudolphi, Mist. Nat. Entoz. ii. pt. 1, 



124 ; Synopsis, 37, n. 1 ; Lamarck, An. S. Vert. 2nd ed. iii. 654.' 

 Fusaria lumbricoides, a equorum, Zeder, Nachtrag, 25 ; Naturq. 



