I.AMrEKX. 



iisy 



UUl. Phc, p. 104. lal.. G. -2. Hg. 1 i + Laiiij: media, 

 [.. lOi;, i,ih. (i. 3, t\g. 2 + Lamp, cwca Baltiien, p. 107, 

 tub. (i. ;i. lig. 1). Petroii>i/:o)i uiiit-o imliiic ili'iiliiiilciniiu 

 luiniDuiruni in liiiilici oris, praHer iiift-riori'S lll;lj^^r^■s +■ /'ficom. 

 ciirpuri' liuiiiiliihc. appendieibiis utrinque dunlnis in iimrgine 

 (■ris, .\i:t., Ichtliijol., Gen. Pise, p. 64; Si/ii. Pise, pp. 

 •Sit il 90; Spec. Pise, p. 99. Petromi/zoti pinnii doranli 

 si'tMuulii (ingnlata (Suefis Neiniiga, Wcstrobotliniensibus Niitting) 

 + Petr. pinna dorsali secunda lineari, labio oris siipcrioro 

 jione Idbatd, LlN., Fna Stiec, ed. I, p. 102. Lesser Laiii- 

 j.i-r;,. I'KNN., /)'/■//. Zool. (ud. 177G). v(.l. Ill, p. 70, tab. 

 \'!II, Nc. 2.S + I'vidc. p. 71, t.ib. VIII. No. 29. 



.4; f..n, 



'.""■■ I'l" 



dcrsalihiis 



ril.tis 



Pelrum>/:oii fltiviatilis. I.i.\., ''^'yst. Xat.. cd. X. b'lii. 1. p. 

 2.30; Bi... Fisch. Dculsclit., part. Ill, p. 41. tab. I.XXVIII, 

 liff. 1; Kktz., Fiia Snec. Lin., p. 303; Swartz, Svensk 

 /Couloiji, II. ij, No. 33; Pall., Zoogr. Ross. Asiat., tout. Ill, 

 p. (>G; Cuv., R'eyn. Anim., cd. I. torn. II, p. IIH; NiLSS., 

 Prodi: Ichthyol. Scand.. p. 122; Ekstr., Vet. Aka.l. Hnndl. 

 1H34. p. 70; Yaku., Brit. Fish., c-d. 1, vol. 11, p. 4.54; 

 Ki:.. Danm. Fisk:. vol. III. p. 1042; NiLSS., Skuml. Fua, 

 Fisk\, p. 74,5; Hckl, Kn., Siisswasserf. Ostr. Mon., \>. 

 377: Sii:n.. Siissicasserf. Mitteleur., p. 372; Malm, Gbgs 

 Vet., Via. Saudi. Haudl., Ny Tidsf.. VIII, p. 88; Mgbn, 

 FinL Fiskfna (disp. Helsingf. 1863), p. 72; v. Bemm. in 

 Hkhklois, Bonwst. Fna Nederl., part. Ill, p. 392; Blanch., 

 Poiss. d. euK.r donees Fr.. p. 515; Caneste., .\rcli. Zool., 

 .\uat., Fisiol., vol. IV, p. 185; Fna Ital., Pese. \>. 31; 

 Gthe, Vat. Brit. Miis.. Fish., vol. VIII, \k 502: Coll., 

 Forh. Vid. Selsk. Cliriiia 1874, Tillreggsli., p. 219; 1879, 

 Xo. 1, p. 107; N. Mag. Naturv. Chrnia, Bd 29 (1884), 

 p. 122; Ltkn, Arct. Man. (Rupert Jones, 1875), ji. 122; 

 JIal.m, (ih'js. Boh. Fna, p. 632; Feddehs., Naturli. TidsUr. 

 Kbhvn, ser. 3, vol. XII, p. 94; MoK., Hist. Nat. Poiss. Fr., 

 toiM. III. p. (104; Bnoke, Fisch., Fischer., Fischz. 0., W. 

 Preuss.. p. 196; Mela, Vert. Fenn., p 370, tab. X; Day, 

 Fish. Gt. Brit., Irel., vol. IL p. 359, tab. CLXXIX, fig. 1 : 

 Mob., Hcke, Fisch. Osts., p. 161; Fatio, Fne Vert. t)>uisse, 

 vol. V, part. II, p. 512; LiLLj., .S'r., A'org. Fna, Fisk., 

 vol. Ill, p. 693; LCnxb., Bib. Vet. Akad. HaiHll., Bd IH, 

 Afd. IV, No. 2. 



Petrmnyzon aryenteus, Bl., Ausl. Fisch., part. IX, ]>. 74, tab. 

 CCCCXV. fig. 2: Bl., Schn.. iiijst. Ichthi/ol.. p. 532. tab. 

 102, fig. 1; Coi^cH, Fish. Brit. Isl., vol. IV, p. 40n. 



Petromyzon prickii (o.x Daubkntox, Encycl. Metli.), Lacei'., Ilist. 

 Nat. Poiss.. toni. I. p. 18. 



Pelromyzon Omalii. V. Bex., Boll. Acad. So. Belg., ser. 2, torn. 

 II (1857), p. 549 cum (ab. .id p. 554; toin. XX (1865), 

 p. 46; Malm. 11. cc. 



* Petromyzon phimbeus, Ayres, Proc. Calif. .Acad. Nat. Sc. 1855, 

 p. 27. Petr. ayresii, Gthr, 1. c, p. 505. Aminocwtes 

 liharius, JORn., Fori.., Ann. N. V. Acad. Sc. vol. HI (1885), 

 ].. 292. 



/>'; forina minor, pinnis dorsalibus altioribus. approxiinatis. 



Pelromyzon I'laneri, Bi... Fisch. Deiitschl., part. Ill, p. 47. 

 tub. LXXVIII. fig. 3 (dub.); Lacep., 1. c, p. 30 (+ Petr. 

 sanyuisnga. toiu. II, p. 101, tab. I, fig. 3 + Petr. sept- 

 oeil + Petr. uiyer, tout. IV, p. 667, tab. 15): OsB., Vet. 

 .\kad. Handl.. 1804, p. 181; Swaetz, I. c; Crv.. 1. c. p. 

 119; NiLSS., Prodr., 1. c. ; Yarr., 1. c, p. 457; Kb., 1. c, 



747; Kessl., Bu 

 A. Mi'LL., Mull, 

 p. 380; SiER., 1, 

 92; Morn, 1, 

 Cane.str., Arcli., 1. c, I 

 rf. Ges. Freib 

 , |.. 95; Mor. 

 •., p. 499; 



11. Soc. 

 Arcbiv 



c, p. 



c, p. 

 . 186; 



i. B., 

 , 1. c, 



LlLL.1., 



•omyzon 

 V, p. 



Coll., 

 107; 

 Day, 



.JoRIi., 



p. 1052; Nu.ss., /•'««, 1. c, 

 Natur. Moscou, 1856, p. 390 

 1856. p. 325; Hckl, Ks., 1. c, p 

 375; Malm, GbgH Mandl., I. c, ] 

 73; Blanch., 1. <•., p. 517 

 Fna. 1. c; Lanohbu.. licr. Verb. Nat 

 B,l VI (1S73). II. 3; ri.:Mu:i:s., 1. . 

 p. 606; BxcKE, 1. c, p. 197; Fatio, 1 

 1. c, [I. 708. 



Petromyzon plumheus {= P. septoeil, Lacep.) + Petr 

 hieolor (= /-". niyer, Laciop.), Shaw, Gen. Zool., vol. 

 263. 



Petromyzon brancliialis (+ larva), Gthb, I. c, p. 504; 

 Forh. 1. c. 1874. Tillicgsb., y. 220; ibid., 1879, p 

 .Malm. Fna. p. 636; Mela, 1. c, p. 371, t.ab. X: 

 1. c, p. 362, tab. CLXXIX. figs. 2 (l.arva) et 3; 

 FoRP. (Ammoco'tes). 1. c, p. 293. 



C: forma larv.ilis. 



Petromyzon iranclnaiis, Lix.. ,Sysl., I.e.; liL., Fisch. Vcntschl., 

 1. c, p. 45, tab. LXXVIII, fig. 2; Swartz, I c; DCm. 

 (Animocoetns), J)issert. Poiss. Cyclost. 1808; Cuv. (.i4mjH0- 

 coetes), 1. < .. p. 120; Nilss. {Petromyzon, subg. Ammo- 

 ca'tes), Pnnlr., p. 123; Yarr. {Ammoccetes), I. e., p. 459; 

 Ki:., 1. c, i>. 1060; Nilss., Fna, \. c., p. 748; Hckl, Kn., 

 1. c. p. 382: Cederstr., ('jfvers. Vet. Akad. Forh. 1861, 

 p. 91. 



Pelromyzon niher. LACiip., 1. c . torn. II, ].. 100, lab. 1, fig. 2. 



Petromyzon linnhricalis. Pali.., L c, \k 69. 



Adn. Aminocoetes anreus (Bean, Proc. U. S. Nat. Mu.s. 1881, 

 p. 159; Bk.-Goode, Fish., Fish. Industr. U. <S'., Sect. I, 

 tall. 251), ex Alaska, Petrom. fluviatilis simillimus videtur. 

 Caput (fide descriptionis) perparvum, '^/jooo lorigitudinis cor- 

 poris 1. "' jnni, distanti!¥ inter apiceni rostri et origiueni pinna- 

 dorsalis priiuse, quod numquain in nostra specie vidi. Figura 

 taiuen citata lias rationes non confirmat. 



The Lamperii attains in Scandinavia a length of 

 at least 4' ^ dm. In Gerinany and France it is said 

 sonietiiues to lueasui-e .') dm. In thi.s I'esjiect, liowever, 

 there is great difference between the Lamperns t)f' dif- 

 ferent tracts within the same ((Uintry, this species toci, 

 in its full ile\ elupmeiit. Vicing an anadromons fish, and 

 requiring tlic liduiitcdiis resnnrccs and saltness of the 

 sea, or at k'ast of hrackisli water, to attain its most 

 typical size and form. How variable the anadromons 

 fishes are in this respect, we have seen most distinctly 

 in the .Salmons; lint tlie .'^ea Lanipre\' liere affords a 

 comparison at iloser (piarters. Where the Lampern 

 li\es in lirooks and otlier small collections of fresh 

 water, it iisnall}' ajjpears as a smaller form, about 2 

 dm. long. Tlie same differences may be observed in 

 the size of the lin-\;e. Sometimes the metaiiKiriihosis 

 from Ammocii-tcs to Fetroiiiyzon takes place at a length 

 of 1 dm., sometimes larva; are met with at least l',„ 



