150. 



90. Supplements within range of spicula 



lugdunensis de Man, 1880 (a or s) 



Supplements anterior to spicula . . . curvatus Th. & Swang., 1936 (s) 



91. Tails distinctly longer than anal body diameter 92 



Tails about as long as anal body diameter 108 



92. Lip region lammelate demani Steiner, 19lU (s) 



Lip region not lammelate 93 



93. Esophagus with basal pseudo-bulb ... graciloides bteiner, 19lU (s) 

 Esophagus without basal pseudo-bulb 9U 



9U. Tails somewhat blvint 95 



Tails apiculate 96 



9$. Lip region set off by constriction . . . nodus Th. & Swang., 1936 (s) 

 Lip region continuous with neck contour 

 junctus Th. & Swang., 1936 (s) 



96. Esophagus tapering uniformly maritimus Ditl., 1913 (marine) 



Esophagus with a distinct expansion 97 



97. Esophagus enlarged in posterior third 98 



Esophagus enlarged near middle 99 



98. Lip region distinctly set off gracilis de Man, I876 (s) 



Lip region not distinctly set off iners Bast., 186.5 (s) 



99. Lip region continuous with neck contour . . . torpidus Bast., 1865 (s) 

 Lip region distinctly set off 100 



100. Tail length 6.0)^ consobrinus de Man, 1917 (s) 



Tail length less than ^.0% 101 



101. Length about 3.0 mm.; width under 2.^%. . similis de Man, I876 (s or a) 

 Length under 2,5 mm,; width about 3.0$S or more 102 



102. Supplements within range of spicula 103 



Supplements anterior to spicula 10 1) 



103. Lips set off by a depression \miformis Thorne, 1939 (s) 



Lips set off by a constriction . , diadematus Th. & Swang,, 1936 (s) 



lOU. Length about 1,0 mm parvus de Man, I88O (s) 



Length 1,5 mm, or more 105 



105, Lip region about half as high as wide , , leuckarti Butschli, 1873 (s) 

 Lip region less than half as high as wide IO6 



106, Tail length twice anal body diameter or more; supplements six to nine 



carteri Bastian, 1865 (s or a) 

 Tail length less than twice anal body diameter; supplements 11-21 .107 



