16 AKNULATA DISCOPHOEA. 



Clepsine complanata, Diesing i. 452; Grube 113; Gerstfeldt 263. 

 Clepsine sexoculata, Malm 203; Kessler 112. 



Habitat in aquis dulcibus sat frequens. — Nadendai, Reso, 

 Helsinge, Mantsala; S. East of Karelia (J. Sahlberg); Ladoga 

 as far as to Sordavala, Onega unto Povenetz (Kessler). 



Ohs\ According to Kessler one of the most common spe- 

 cies in the territory of Onega. 



I think Gerstfeldt to be in right, M^hen (o. cit. p. 264) 

 identifying Clepsine complanata and verrucata, F. Miill. 



b) Saccorum ventralium paria vij et ultra Caput subdiscretum 

 (Lobina, Moquin-Tandon). 



C. marginata 0. F. Miiller. G. subcartilaginetmn, antrorsum 

 angustatum, fusco-mride, supra 'macidarum flaveseentium serie- 

 hus jv, medio dorso linearum ejusdem eoloris serie notato; m-argiiie flavo- 

 albo-fuscoque tessellato. Ocelli jv in series dims longitiodinales, stirsum 

 eonvergentes dispositi, postici majores. Long. 20, lat 3 — 4 'm. m, 



Syn. Hirudo marginata, 0. F, Miiller i. ii. 46; Linne S. Nat. xill 



8098: Johnson 36;. 

 Hirudo variegata Braun 61. 

 Clepsine marginata, Fr. Miiller 1844 p. 370; Diesing i. 447; 



Grube 114; Malm 208; 

 Glossiphonia marginata, Moquin-Tandon 375; G. Johnston 339 i'ut 

 etiam : Glossiph. flava, Johnston). 



Habitat in rivis stagnisque ad plantas; rara. — Aura-ri- 

 ver, Reso, Nadendai; S. East of Karelia (J. Sahlberg). 



C. tessiilata, 0. F. Miillov. (\ (irlatiiiosuin mollissiriuiiii 

 suhellip)tici())i, plario-dciircsKiiin aiitnu-siini j)iinlhihiiii (iiKjia^fatKiii, ciiicro- 

 viride supra maculanoii fUircHcp.ni'niin serirbiis ij — rj iiofatuni, iiiarijhic 

 cinereo flavoque tesselato. Ocelli viij in series duas loiigltHdinales dis- 

 positi. Pars oesophagea tractus cibcorii sacculis jv coeds, qtionmi vicdii 

 bipartiti; diverticula ventralia vij bigeniculata, fundo bi-l. tripartita; 

 sejjtimum fundo suo fundo ult.imi saccorum rectcdiuni attingens, latere 

 exteriore diverticulis jv minoribus, praeter fimduw d i roiicidiformem prae- 

 dittim\ sacci rectales jv, quorum ij anteriores ardrorsain, postici retror- 

 suni vergenfes. Long. IS — 25, lat. 3 — 5. 



Syn. Hirudo tessulata, 0. F. Miiller i. ii. 45; Linne 8. Nat. xill. 

 30.8; Braun 56; Johnson 33. 



Clepsine tessulata, Fr. Miiller 1844 p. 370; Diesing i. 447; Malm 213. 



Glossiphonia tessellata, Moquin-Tandon 379; G Johnston 312. 



Clepsine tesselata, Grube 114. 



Habitat in rivis stagnis paludibusque hand frequens. — 

 Nadendai, Reso, Mantsala; S. East of Karelia (J. Sahlberg) — 

 Medio in men sis Julii in di vidua legi ova gerentia. 



Obs\ Ol this species I have got two varieties without 

 any intermediary, viz: a small dark one corresponding to Clep- 

 sine tessulata. Malm, within except of the dilatation of the neck; 

 and an almost thrice as large but paler one 



