HELMINTHOLOGY HELMINTHES NEMATODES. 455 



the male was spirally convoluted, alate on each side, and 

 furnished at the extremity with two projecting curved penes 

 of unequal length. Valenciennes thinks he observed in 

 the interior a brown-coloured proboscis (une trompe), which 

 was one third the length of the intestinal canal, and could 

 be protruded to some distance. The females, which were 

 rather longer and thicker, were straight, not alate at the 

 caudal extremity, and were able to protrude a still longer 

 proboscis. The short vagina, which was situated at the 

 termination of the anterior third of the body, soon divided 

 into a double uterus, one [subdivision] of which proceeded 

 inferiorly, and the other superiorly. Valenciennes observed 

 a pair in copula, for which purpose the male had wound 

 himself spirally around the female sexual orifice. Since 

 Rudolphi assigns but one penis to his Spiroptera meyastoma, 

 and Gurlt also has figured but one penis in this worm, 

 Valenciennes hesitates in regarding the above-described 

 worms as Spiroptera meyastoma ; it is, nevertheless, most 

 probable that they do belong to that species, and that the 

 second penis has previously been merely overlooked. The 

 Reporter is acquainted with very many Spiropter<e with a 

 double penis of unequal length. 



Bellingham (Ann. Nat. Hist, xiii, 1841, p. 101, and xiv, 

 p. 478) mentions nine species of Spiroptera, and the same 

 number of species of Strongyhts, as occurring in Ireland. 

 Among which are six doubtful species of Spiroptera from 

 the oesophagus of Corvus corax, and Charadrius pluvialis, 

 from the small intestine of Fulica atra, from tubercles of the 

 oesophagus of Tadorna Bellonii, from the crop of a Procel- 

 laria anglorum, and from the digestive canal of Raja batis. 

 Among the species of Strongylus, we have Stronyylus (Syn- 

 gamus, Sieb.) trachealis, from the trachea of Perdix cinerea, 

 and Pavo cristatus, together with two doubtful species from 

 the thoracic cavity of Buteo rufus, and the trachea of 

 Meleagris gallopavo. Besides these, Oxijuris curvula, am- 

 bujua, and Cucullanus elegans, tandfoveolatus, are indicated 

 by him as Irish species. 



