Dr. Johnson’s observations on 
34 ° 
CHARACTER GENERIS. 
Corpus subovatum, depression, caput acuminatum , lingua tubulata 
resiliens , os caudamque alterne affigendo progrediens. 
G. tuberculata : Glossopora dilatata, supra ctnerea linea du- 
plici tuberculata, subtus grisea, atomis nigris innumeris. 
Linnaeus. Syst. Nat. XII. 2. p. 1079. n. 6 . 
— — — — — Faun Suec. 2082, Hirudo depressa ovato-ob- 
longa interaneis fuscis pinnatis pellucentibus. 
Hill. Hist. Anim. p. 16. Hirudo lateribus attenuates. 
Bergmann. Act. Stockh. 1 757, Tab. 6 . Fig. 12, 14. Hirudo 
sexoculata. 
Muller. Hist. Verm. 2. n. 157, p. 47. Hirudo compla- 
nata. 
G. punctata : Glossopora gracilis , cinereo'viridis , punctis plu- 
rimis subnigris. 
Linn^us. Syst. Nat. XII. 2. p. 1079. n. 5. 
■ — - — Faun. Suec. 2081. Hirudo (stagnalis) depressa 
nigra, abdomine subcinereo. 
Bergmann. Act. Stockh. 1 757, n. 4. Tab. 6 . Fig. 9 — 11. 
Hirudo binoculata. 
Muller. Hist. Verm. 2. n. 171. p. 41. Hirudo bioculata. 
I am of opinion, that the Hirudo circulans described by Mr. 
Sowerby,* and the Hirudo crenata by the Rev. William 
Kirby, -f belong to this genus ; but having had no opportu- 
nity of seeing either s I cannot determine whether or not they 
possess the tubular tongue. 
* British Miscellany, Tab. 76. 
f Linn. Trans, vol. ii. p. 316. 
