326 THE ANIMAL PARASITES OF MAN 



WANDOLLECK, B. Z. Embryonalentw. d. Strong, paradoxus. In.-Diss., Berlin, 



1891, and Arch. f. Naturg., 1892, Iviii, p. 123. 

 SPEMANN, H. Z. Entw. d. Str. parad. (Zool. Jahrb. An., 1895, Part viii., p. 



301.) 



Strongylus. subtilis, Looss, 1895. 



The male measures 45 mm. in length and anteriorly measures 

 only 0*009 mm - in breadth, whilst at the back, just in front of the 

 bursa, it measures 0-07 mm. The muscular oesophagus occupies a 

 little less than one-sixth of the body, and behind it there are two 

 large gland cells ; at the back of these starts the genital tube 

 which extends through the entire body cavity as far as the anus. 

 The bursa consists of two lateral semicircular wings, which 

 ventrally are connected by a low cross-bridge ; the ribs of the 

 bursa appear to be asymmetrically arranged, the spicules are equal 

 and measure 0*15 mm. in length, and have irregularly running 

 supports springing from the anterior ; between them there is a 

 chitinous fragment of a boat-like shape with two fine points directed 

 ventrally. The females measure 5*6 7 mm. in length and about 

 0*09 mm. in breadth, though the cephalic extremity only measures 

 0*01 mm. across ; the anus is 0*097 mm. in front of the posterior 

 extremity which tapers suddenly into a slender pointed tail ; the 

 oesophagus, intestine and glands are the same as in the male ; 

 the vulva is situated at the commencement of the last fifth of 

 the body ; of the two genital tubes one passes forwards to the 

 hindmost cervical gland, then bends backwards, and after a short 

 run turns again with its blind end towards the front ; the 

 posterior tube runs as far as the anus, then turns to the front, and 

 shortly in front of the middle of the body, turns back again and 

 almost immediately terminates blindly. The mature eggs are oval, 

 (0*063 0*041 mm.) and have thin shells ; they are apparently 

 deposited before segmentation. 



This species was found by Looss in the anterior part of the 

 small intestine in post mortems of fellahs of Alexandria and Cairo ; 

 it, however, also inhabits the intestine of the camel. 



According to Ijima the same species was found in the stomach 

 of a Japanese woman. 



LITERATURE. 



Looss, A. Strongylus subtilis n. sp., ein bisher unbekannter Parasit des Mensch 



i. Aeg. (C. f. B. u. P., 1895 [i], xviii., p. 161.) 

 Notiz z. Helm. Aegypts. i. (Ibid., xx., 1896, p. 864.) 

 IJIMA, J. Strong, subt. in Japan. (Zool. magaz., 1896, vii., p. 155.) 



