250 



MR. H, A. BAYLIS AND LT.-COL. CLAYTON LANE ON 



previously (1809, p. 198) given as liis antliority for the latter 

 name Braun (in Schneider, 1789), but expressly n)entions that he 

 has been unable to obtain the appendix in which this name 

 appears. We also have failed. Since Stiles nnd Hassall (1905) 

 do not mention this name in dealing with this genotype, we have 

 presumed l^iat it is a nomen nudum and have disregarded it. 



Text-fie-ure 1.* 



Text-figure 2. 



^|-^^- 



Text-fig. 1. — Spiro.vi/s contoria. Terminal portion of spicule. 

 Text-fig. 2. — S'piroxys contorta. Tail of female ; lateral view. 



Text figure 3. 

 ut. 



Spiroxys contorta. Female genital organs. (Mature specimen. 



It is necessary to mention Leidy's (1856, p. 53) Physaloptera 

 contorta as a possible synonym, liis description is as follows : — 

 " Body capillary, most narrowed anteriorly with the posterior 

 four-fifths spirally contorted ; white, with the intestine brown. 

 Lips prominent, constricted from the body, trilobate. T'ail shoi-t, 

 conical, acute, in the male with narrow ahe each furnished with 

 five funnel-shaped pores. 



* For explanation of lettering, see p. 310. 



