192 1.] T. Kaburaki: Notes on Leeches. 715 



into well-bonuded somites. So far as m^' observation qoes, so- 

 mites i, ii, iii and xxvii aie uniannulate; iv, v and xxvi biannulate; 

 vi, vii, xxiv and XXV triannulate ; viii and ix quadriannulate ; the 

 fourteen somites x-xxiii are complete with five rings. In each typi- 

 cal somite the furrows separating the rings are not of equal depth, 

 the deepest ones being always found between the second and third 

 as well as the third and fourth rings. The furrow between the first 

 and second rings is, in most instances, the shallowest of all. 



The five pairs of eyes are arranged in the same manner as 

 those observed in Hiriido or Haemopis. 



The male and. female genital orifices are placed between the 

 fourth and fifth rings of somites xi and xii respectively. 



The anus opens on the dorsal surface just behind the last ring 

 of the body. 



Genus Haemadipsa, Tennent. 



27. Haemadipsa zeylanica (Moquin-Tandon), 1826. 



Hirndo zeylauicii. Moquiii-'randon, 182(1. 

 Hinido flava. Scliiiiarda, 1S61. 



Hirndo {Clitkonohdella) sumatraiia. llorsl, iSS^. 

 Haeinodipbii sylveitrii. R. Blanchar.l, 1S94. 



In his paper R. Blanchard puts on record a form closely re- 

 sembling the present leech as a distinct species, Haemadipsa sylves- 

 iris, chiefly on account of the presence of a narrow interpolated ring 

 between the two oculiferous rings 4 and 5, which, according to a 

 careful examination of a large series of examples, appears" not to 

 be of a constant occurrence. I am, therefore, of the opinion that 

 this difference may be regarded as being of insufficient value to sep- 

 arate the two forms specifically. 



As is well-known the species is of wide distribution in the 

 Oriental region, it having hitherto been recorded from Ceylon, the 

 Himalayas, Buima. Cochin China, Tonkin and also from various 

 localities in the Indo-Malayan Archipelago, such as Sumatra, 

 Borneo, Celebes, Java, etc. The collection which I have examined 

 contained a great number of this species obtained from several lo- 

 calities in India and its vicinity : at elevations of 1300-6500 ft. 

 in the Darjiling District, the Hast Himalayas, Assam, Central 

 Provinces, Madras, Lower Burma and elsewhere. 



The body is nearly cylindrical, tapering gradually towards the 

 head end. Centrally attached is a circular posterior sucker which 

 is rather less than the greatest width of the body. The large speci- 

 mens are about 40 mm. long, excluding the posterior sucker by 

 7 mm. across at the posterior region of the body. 



The body consists generally of 98 rings, of which rings 5 and 6 

 coalesce ventrally to form the posteiior margin of the anterior 

 sucker. Among the examples with the same colour markings from 

 Kovalai, at elevations of 1300-3000 ft., in Cochin State, there was 

 one individual only in which rings 7 and 8 are also fused on the 

 ventral side. On some occasions a narrow ring occurs interpolated 

 between the oculiferous rings 4 and 5, but this, so far as my observa- 



