APPENDIX B 177 



NOTOBDELLA Benham 1909. Suckers discoid, eyes 1 pair, 

 abdomen rounded but distinct from trachelosome. One im- 

 perfectly described sp. from Antarctic. 



NOTOSTOMOBDELLA Moore and Meyer 1951 

 (=Notostomum Johansson 1898). Suckers equally large and cup- 

 shaped, mouth in anterior edge of oral sucker, eyes 0, abdomen 

 rounded and ill-defined, annuli 14-16, coelom reduced to dorsal 

 and ventral lacunae, diverticula fused with 5 fenestrae, testes 

 6 pairs. 



Notostomobdella laeve (Levinsen, 1882). 100-150 mm long. 

 On Hippoglossus pingvis, Somniosus microcephalus and Platyso- 

 matichtys hippoglossoides. Greenland. 



OCEANOBDELLA Caballero 1956 {=Abranchus Johansson, 

 1929). Anterior sucker very small, eyes 3 pairs, posterior sucker 

 discoid and usually with ring of ocelli, skin transparent, clitellum 

 constricted, abdomen flattened, annuli 3 (6), coelom somewhat 

 reduced so that segmental transverse communications link lateral 

 and dorsal lacunae only, diverticula separate or partially fused, 

 testes 4-6 pairs. 



^Oceanobdella microstoma (Johansson, 1896). 25 mm long, 

 unpigmented, ventrally on Cottus scorpius. W. Europe, Iceland, 

 Greenland, Spitzbergen. 



*Oceanobdella blennii (Knight-Jones, 1940). 12 mm long, trans- 

 versely banded with brown and capable of extreme abdominal 

 flattening, posterior sucker less broad than abdomen and with 

 few or no ocelli, attached behind pectoral fin of Blennius pholis. 

 Anglesey and Swansea, U.K. 



Oceanobdella sexoculata (Malm, 1863). 11 mm long, banded 

 with brown, posterior sucker somewhat broader than abdomen 

 and with complete ring of ocelli round margin. On Zoarces 

 viviparus, Gadus callarias, Cyclopterus lumpus. W. Sweden. 



OPHIBDELLA Beneden and Hesse 1863. Young of Pontob- 

 della (Apathy, 1888)? 



OSTREOBDELLA Oka 1927. Suckers discoid and equally 

 large, eyes 1 pair, abdomen rounded and ill-defined, annuli 14, 

 internal anatomy undescribed. One sp. Japan. 



