166 MARINE AND FISHERIES 



5 GEORGE v., A. 1915 



B. Genus Placobdella, Blanchard. 



6. P. parasitica, Say. 



7. P. rugosa, Verrill. 



8. P. montifera, Moore. 



9. P. phalera, Graf. 



10. P. pida, Verrill. 



II. Family Hirudinidjej. 



C. Genus Macrobdella, Verrill. 



11. M. decora, Say. 



D. Genus Haemopis, Savigny. 



12. H. marmoratis, Say. 



13. H. grandis, Verrill. 



III. Family ERPOPDELLiDiB. 



E. Genus Erpobdella, Blainville. 



14. E. punctata, Leidy. 



F. Genus Nephelopsis, Verrill. 



15. N. obscura, Verrill. 



IV. Family Ichthyobdellid^. 



G. Genus Piscicola, Blainville. 



16. P. milneri, Verrill. 



17. P. punctata, Verrill. 



Family GLOSSiPHONiDiB. 



Leeches of small to medium size, rather short and broad; caudal sucker 

 usually broad and flat; the somites of the middle region of the body usually of 

 three annuli and in most species sensillae and cutaneous papillsB, in some species 

 several series. Eyes 1-4 pairs, situated close to the median line. The first 

 may be compound, the others simple. From the mouth situated in the oral 

 sucker the pharynx passes backwards and forms a sheath for the protrusible pro- 

 boscis. This is succeeded by the oesophagus and the crop. The crop possesses 

 from one to ten pairs of lateral cseca and the stomach four pairs. In the literature 

 of the group this family is characterized by the possession of salivary glands, 

 but five species possess in addition to these a pair of oesophageal glands (Heming- 

 way, 1908). The eggs and young of these forms are carried on the ventral surface 

 of the body of the parent. The adult individuals are usually found clinging to 

 fish or frogs, sticks or stones. 



Genus Glossiphonia, Johnston. 



Moderately depressed or elongated, tapering more or less toward the anterior 

 end. Eyes 1-3 pairs, simple; cutaneous papillae present in some species but 

 usually not conspicuous. Pharyngeal glands diffuse; gastric cseca 1-7 pairs, 

 not greatly branched. Sperm ducts forming long open loops. Chiefly free-living 

 forms. 



