MOSOr.RAPH OF BRITISH LAND AND FRESHWATER MOLLUSCA. 



121 



!'• 



f. 1. 



Sub-Genus Hjjilnilimi.r A. W. Malm. 

 Agriolimax laevis Mailer. 



Liiiia.r Isvis Miillcr, y^nn. Hist., ii. , p. I, no. 199. 



bninnrus Diaji., T:ilil. Moll, p. 104, no. 13. 



lai-nstris Bunelli, in .Sclied, Mas. Taurin. 



cmiipestris Binney, Proo. Boston Soc. Nat. Hist 



lombriroidcs Morelet, M(j11. Port., p. 39, pi. 3, f, 



fKiri-ahis Xoruianil, Desc. Liin. Nouv., p. S. 



iiniiiii-iiis (iassies, M.alar. .-Vriuitaiiie, pp. 117-110, pi 



'(/7/(»/(H».5 Stroliel, ifal. Xr'j,. Meriil., p. 6. 



iiiuntnnus In'j^exnoW, Bull. U.S. Genl. Sur\-. Ten' 



ciistanetis ln;4ers()ll, op. cit. 



inr/cr.wUi W .(I Biiiiicy, Proc. Acail. Nat. Sci. Pliilail. 



hi/pcr/jurcii.y Westcrlund, Naclisbl. il. Deutscli. Mai. Lies., i 



iiin-idloniilis Doering, Bol. Acail. Cordoba, p. 43i. 



■v/dm/ch.s Strebel, Faun. Mexik. Conch., p. 21. 



hnisilii'ii.'^is Von lliering, Jalirli. Deutseh. Mai. Ges., p. -Jdl, pi 



qiireiislaiidicusUeMey, Proc. Roy. Soc. Qaeen.sland, p. l.'id, ]il 



(Agriolimax) rrirotoiuidiin.s Heyn. , Nachbl. .1. Deiitsdi. Mai. C 

 oHinii.r lircis Le.ssoiia &. I'ollouci'a, Monog. Limac. It.al., p. 47. 



hcvciiofl CoUinge, Proc. Ma). Soc, vol. 2, p. 29,i. 

 1S6,S I[i/ilj-n/i,iiri.,j licvis Malm, Liniac. Skanil., p. 79, \>\. 3. 

 bSliS lYiiiurhilliifi (MrUino) brunni:iin ilabillu, Rev. et Ma; 

 1SS7 Ai-iii(c/ii(i brunncus Fischer, Man. Concli., ii., p. 462, 



1774 

 1801 

 18-22 

 1S41 

 184.1 

 1 S.-)2 



1S(;7 

 1S74 

 1S7.-, 

 1S7.") 

 1 S7.J 

 1S7() 

 187S 

 1880 

 188.'j 

 1888 

 1871 

 18S2 

 1897 



1, 

 304, 



07. 



A.jri. 



Zool., |.. 141. 



ISTORY. — AfirioVuiKt.c licvift (lerl>!, 

 .siiiuotlij wa.s lir.st discovered in tins 

 country ])y Mr. Jo.sliua Alder, and its 

 jicculiar eliaractevs pointed out to Dr. G. 

 Jolnistuu, wlio published the discovery in 

 IS.'i.S in the Proceedings of the Berwick- 

 shire Naturalists' Club. 



The species was, however, afterwards 

 ost sight of, neglected or misunderstood, 

 anil became relegated to the ranks of 

 doubtful species by Jeffreys, Reeve, and 

 others, despite the jiersisteut efforts of 

 ilr, E. J. Lowe, F.Pi.S., to secure the 

 recognition of its .specihc status. 



The autlioritative exposition of its in- 

 ternal structure by Dr. Simroth has hnnly 

 estabhshed A. Iwcis as a valid species, 

 whicli is now universally recognized. 



AVith tliis species is associated Dr. J. F. 

 Babor, of Prague, whose profound re- 

 searches, more especially upon ^4. l<rc/s, 

 have demonstrated the actuality of a 

 remarkable cycle of changes in the development of the reproductive organs. 

 It wa.s placed by Malm in a new genus, Hi/drolima.r ('I'Oiu/), water, and 

 Lima.r), whicli is here adopted in a sub-generic sense to mark the al)sence 

 of the rectal ccecum and the digitate tlagellum. 



Diagnosis. — A. hecis may be distinguished from A . a ijrc.'if is ]ty its active 

 and I'estless habits, its uniform red-brown colour, colourless mucus, the abrupt 

 termiual end of the body, the large shield, and its nearly median ])osition 

 when the animal is fully extended, owing to the unusual lengtli of the neck. 



Internally, it is sharjjly divided from A. mjn'st/s by the total absence 

 of the rectatheca and ijf the digitate gland at the apex of the penis-slieath. 



25, a, (II H 



'Jr. ^o^-'t^Trr-^ 



