APPENDIX A 159 



— Anus close to posterior sucker, no peduncle 25 



25. Minute simple supplementary eyes near mid-dorsal 

 line of head; every third annulus deeply pigmented 

 green and brown ; length 25-40 mm 



Placobdella hollensis (Whitman 1872) 



— No supplementary eyes; length 50-100 mm; very 



flat 26 



26. Dorsal tubercles inconspicuous or absent; brown, 

 green and yellow pigment dorsally, about 12 bluish 

 stripes ventrally. Placobdella parasitica {S3.y \S24) 



— Dorsal tubercles prominent 27 



27. With large, rough dorsal tubercles and many smaller 

 ones; body translucent; colouring a fine mixture. 



Placobdella ornata (Verrill 1872) 

 [=P. rugosa (Verrill)] 



— With smaller, more uniform tubercles ; colour, mottled 

 on surface, about 30 dark brown lines beneath and these 

 remain after preservation. 



Placobdella multilineata Moore 1953 



— With small but conspicuous tubercles in 5 longitudinal 

 rows, appearing as whitish spots on coffee brown 

 stripes; ground colour pale, brownish, with white or 

 yellow spots. Placobdella papillifera (Verrill 1872) 



28. 2 annuli per segment; 7 pairs of crop caeca; 5 pairs of 

 testis sacs. Oligobdella Moore 1918 



Oligobdella biannulata (Moore 1900) 



— More than 2 annuli per segment 29 



29. Posterior sucker with marginal circle of glands and 

 retractile papillae. Actinobdella Moore 1901 30 



— Posterior sucker without marginal retractile papillae; 

 3 annuli per segment; gonopores united; 5 or 6 pairs 

 of crop caeca. Oculobdella Antrum 1936 



Oculobdella lucida Meyer and Moore 1954 



30. 3 annuli per segment; about 30 conical papillae on 

 posterior sucker; dorsal tubercles prominent, in 5 

 longitudinal rows. 



Actinobdella triannulata Moore 1924. 



