686 



ANN U LATA AND HIRUDINEA 



In 1896 Blanchard divided this subfamily into two series: (i) Monosticho- 

 donta— jaws armed with one row of teeth; (2) Distichodonta — jaws armed 

 with two rows of teeth. 



The genera are: Hirudo, Limnatis, Hcemopis, Hivudinaria, Limnobdella, 

 Macrobdella, and Whitmania, which are divided into two series. 



Series 1: Monostichodonta. 



Hirudininae with jaws with or without papillae, and armed with a single row 

 of numerous sharp teeth. 



Hirudo Linnaeus, 1758. 



Synonyms, — Sanguisuga Savigny, 1832; latrobdella de Blainville, 1827. 



Hirudininae with twenty-six somites, of which the ist and 2nd have each 

 one ring; 3rd, two rings; 4th, 5th, and 6th, each three rings; 7th to 22nd, 

 each five rings ; 23rd, three rings ; 24th, 25th, and 26th, each two rings ; making 

 in all 102 rings. 



Eyes are carried on the ist, 2nd, 3rd, 5th, and 8th rings. The buccals are 

 the 5th and 6th, and the post-buccais the 7th and 8th. The first pair of 

 nephridia is on the 13th, and the last (the 17th) pair on the 93rd ring. 



The male orifice is between the 30th and 31st rings, which are the 2nd and 

 3rd of the loth somite. 



Fig. 309. — Hirudo muUistviata Schmarda. 

 The common water leech of Ceylon. 



The female orifice is five rings behind that of the male — i.e., between the 

 35th and 36th rings. The anus is situate on the 102nd ring, or between the 

 loist and 102nd. 



Hirudo medicinalis Linnaeus, 1758, is found principally in Hungary, Variety 

 officinalis. 



H. troctina Johnston, 1816, is the medicinal leech of England, France, Spain, 

 and Algeria. 



H. nipponia Whitman, 1886. Japan. 

 H. sinica de Blainville, 1827. China. 

 H. quinquestriata Schmarda. Australia. 

 H. saigonensis. Cochin-China. 



H. asiatica R. Blanchard. Afghanistan and Persia. 

 H. timorensis R. Blanchard. Timor. 

 H. septemstriata Grube. South Africa. 



H. hildehrandti R. Blanchard. East Africa, Victoria Nyanza. 

 H. multistriata Schmarda. Ceylon. 



Series 2: Distichodonta. 



Hirudininae with jaws without papillae, and armed with two rows of in- 

 frequent, blunt, irregular teeth. 



Haemopis Savigny, 181 7. 

 Synonym. — Aulastoma Moquin-Tandon, 1826. 



Hirudininae with 3 rings on the 23rd somite, and two rings to the 24th, 

 25th, and 26th somites. Crop with one pair of elongate lateral caeca reflected 

 posteriorly. Genital openings usually separated by five rings. Upper lip 

 of anterior sucker not divided interiorly by a longitudinal groove. H. 

 sanguisuga Linnaeus, 1758, found in Europe, and H. lacustre Leidy in America. 



Limnatis Moquin-Tandon, 1826. 



Hirudininae with a longitudinal groove on the inner surface of the upper 

 lip of the anterior sucker. Jaws with more than 100 teeth. 



