212 Journal of the Asiatic Society of Bengal. [June, 1913. 
Nephelis gallica, id., Bull. Soc. zool. France XVII, p. 172 
(1892). 
Dina latina, id., Att. Soc. lig. Sci. Nat. Geog. III, No. 4 
(1892). 
Dina quadristriata, id., Boll. Mus. Torino 1X, No. 192, p. 60 
(1894). 
Herpobdella lineata, Johansson, Zool. Anz. XXXVI, p. 379 
(1910). 
Herpobdella lineata, Rousseau, Ann. Biol. lacustre V, p. 79 
1913). 
This species has, especially in the last few years, been 
subjected to many change s of name:! there seems little doubt 
that it is the one called Hirudo lineata by F. O. Miiller and 
that lineata is therefore the correct specific designation. The 
generic name, however, has also been called in question. In 
1893 Blanchard made it the type of his new genus Dina, 
because it differed from other Herpobdellidae in that the third 
ring of the somite was enlarged and divided longitudinally by 
a superficial furrow. This feature, which is shared with at 
least one other European species (Dina absoloni, Johansson), * 
is evidently constant, although often difficult to detect, and 
sand be regarded, as Johansson (1913) suggests, as of subgeneric 
valu 
The typical form of the species is widely distributed in 
Europe, North and Central America and occurs also in 
Madeira and the Azores. Varieties or local races have been 
described (in Russian *) from Siberia and Mongolia 
aerpeaahs (1894) describes the colouration of “< Dina quad- 
ristriata’’ as follows :-~‘* Venter pallidus. Dorsum cinereum aut 
subviride, adele taeniis nigris ornalum, maculis albidis aut 
subfiavis praesertim supra primum an nulum somiti notatum. 
But, although the living individuals I saw in Palestine and 
Syria varied | somewhat in the exact shade of the dorsal surface, 
they agreed in being absolutely devoid of all trace of definite 
markings. : lal seed therefore, to regard the race as distinct 
under the n 
Subsf. concolor, nov. 
This race is Sees from the typical form of the 
species by the absence of all trace of the longitudinai stripes 
which are usually a conspicuous feature of the colouration. 
The ventral surface is devoid of superficial colour, while the 
back is uniformly suffused with black pigment, to a different 
: See J rieaprastgal s paper ‘‘ Zur Kenntnisder oes gon cae 
ands,’ Zool. Anz. XXXVI, p. 379 (1910), and Rous ee 
Hiradinges d’eau pen d’Europe,’’ Ann. a Pe ames ¥, p. » 286 (1913). 
ool. Anz, XLII, nr. 2, p. bd ge 
8 Plotnikow, Ann. Mus, Zoo 2, Bob. Bt St. oe X, p. 153 (1905). 
Pa 
Bei 
