NO. 11 CO. 



LEECHES OF THE U. S. NATIONAL MUSEUM— MOOBE. 



561 



MACROBDELLA Verrill. 

 Not Macrohdella Philippi. 

 Veirill's use of Macrohdella seems to have priority, his paper having^ 

 been published in February, 1872, while Phili])pi's was not published 

 until October of that year. 



27. MACROHDELLA DECORA (Say) Verrill. 



Hirudo decora Say. 

 Hirudo decora Leidy. 



No. 4599, U.S.N.M. Wytheville, Virginia; Col. M. McDonald, U. S. 

 Fish Commission. Two specimens. 



No. 4503, U.y.N.M. Fulton Lakes, Adirondacks; Fred. Mather, July 

 2, 1882. Thirteen specimens. 



PHILOBDELLA Verrill. 



Verrill established Philohdella as a subgenus of Macrohdella, though 

 he inclined to raise it to the rank of a full genus, which is undoubt- 

 edly its proper systematic value. The most remarkable character of 

 the genus is that the ducts of both male and female organs open exter- 

 nally within the limits of somite XL The sexual adhesive organs are 

 arranged around these pores. 



28. PHILOBDELLA FLORIDANA Verrill. 



The chief points in the annulation of this species are shown in the 

 following table: 



Annulaiion of I'liilohdella Jloridanu. 



Somites. 



I .. 



II . 



Ill 



Annuli. 



Prontomium. 



3- 



5». 



IV ^ 6/ united ventrally. 



7 limited ventrally. 



9 



10 



Not defined ex- 

 ternally. • 



|jQ2) Partly united. 



Organs. 



First pair of eyes. 

 Second jiair of eyes. 

 Tbird pair of eyes. 



Fourtli i)air of eyes. 

 Fifth I'air of eyes. 



First pair nephridiopores on iioste- 



rior margin of i:i. 

 Second pair nepliridio])ori s on i)os- 



terior margin of 18. 

 Tiiird to fifth i>air8 of nephridiopores 



on 23, 28, and 'i'i. 

 Male pore on 34. 



Female pore on 37. 

 Sixth i)air of iicijliridiopores on 38. 

 Seventh to scvciitc^eiitli and lant pair 

 of nephridiopores on 43 to 93. 



Anus. 

 Posterior sucker. 



Proc. N. M. vol. xxi- 



-M> 



