A. II. WAI.ÏIIKII. 



l.'lIKIiKDITK W. I A cniiKi r, |ii; i,\ iiuKi; i iiK/, i,i; (|||;\\|, 



niiie vclliiw suiiposcd lo (•(iiiic rrniii icd |i;irciiU. .ind nul une ol' llirsi' c-isi-s c-ui 

 lie ciiiisidcrcil ;is provod. ^(>ll(l^\ is lliiMTrdic diiiiiiiKinl Ici i-(>d. 



Tp. 'I'Iicsc ]iiiiiri|)lc coloiirs iiiny Iji' iiKidilicil liv luiir kinils ol' sn|)|ili'iiicnlni'v 

 luai-killt^s : llhir/.- markx (Melnnism). ir/iilr hnirs Icilcul richi a I ni'irl:^ uj'lhr iii'r- 

 hnlil An/.srs (Frcni-li : Inrhcliirp) (Icnciidci'ini.-i). u'Iiilr shirL-liii/x (l'rciKdi : lial- 



Xiines). 'l'Iio lliriT liisl arc Ml\\a\ s rpi^lal ir un I lii' iiiincipal (-(diiiir. .■mil ■.ndi 



ni lior. in II M' iirdiT iinnicd. A>^ \n llie hrrcdilv of w liilc sl(irkini;>^. I r,in L;i\ r nu 

 inlornialiiin, Inil il scoins lo nir I h cri' arc sc\ cral L;cncl ir I \ pcs runcrrncd . 



A. Hlack marki<. 



I. Thcre arc sniall ipninlilics ul' lilaidv piL;nnnd in llic nianc and lail ni' 

 a laro'o luiinljiM- of clieslnnls (aboni T.'i " „). 



II. irOicre is as'i'ealor aniiinnl of Idack pii^nicnl prc^-ciil llian is rmiiid in 

 llic cliesliml. n liorse \\illi red groiind culonr liccmncs a liny (liicsc ni.i\ lie 

 l'oiind of varions shades); a ycllow liorso hoconics dnii. Tlic l)la<dv piiiincnl i-- in 

 ail tliose casos alisoliilely independanl dl" Ihc Iwo princi|d(> cnlonrs. 'l'hc cITimIs 



Iliade (Wilson, Sliirlevant) lo discovcr llic iidiciil c ni' Ihc i liararicrs hruwn 



and liay lia\c ahvays failed becausc lliesc Iwo colonrs arc uni hcrcdilarv iinils. 



III. The blaidv liorsc ((icrman : Rappel ahvays carries aL IcasI onc of Ihc 

 priiicipic colonrs liyposlatically. nnd il may carry bolh (if il is hclerozvgous 

 \\ il h respect lo yellow ). 



W. The iiiosi intense (legrc<> olnielaiiisiii is récessive lo Ihal ni' h'ss iiiliMi- 

 sily. ir Ihc iirogeny of two black liorscs, hclcrozyg-ons for li. is nul a hlack 

 hnrsc. il is ahvays (aecordinî>' lo w hich of Ihc principle colonrs are hxposlalic 

 in llie pai-cnts) a Mdlow . or a l'cd liorse. williiiiil Mack. 



'l'wo bays, or Iwo dmis. niay prodnce black horses, Iwo lii>hl lia\s mav 

 prodnce dark bays. lïnl Ihe production of a lisjjlil bay by ba\s in wliich a 

 fjjrcater amoiint of black pit^mcnl is présent, is only nienlioned vcry rarcly, and 

 inview of thepossibilily of error, Ihe correclness of thèse facls may be doiiblcd. 



A black horse crossed with a chesinni suives, in Ihc majorilv of cases (if 

 Ihc former is nol hclerozyg'ous,., Ihe inlei-niedialc foian : lia\. Iheeross belwi'en 

 a ligbt l)ay willi a black liorse gi\csdark lia\ . Ail llicse phenomena cinnol 

 bc explained by tbe siipposilion Ihal lliere is imperfeci doniinanee in l',. wilh 

 ségrégation in V,. \ 



h. While hairs (leucotrichia) aerording lo Ihe cvlcnl in wliicli il occnrs. 

 and according lo the ground eolonr of Ihc coal. gi\cs rise lo Ihc nibican horse 

 I French : niliican; (ierman: sticlielhaariges Pferd) whcn Ihere arc few while 

 hairs dispersed ; to Ihe roan. Iilnish grey horse (French : rouan. ,iiilière; (ier- 

 man : Rolschimmel, HIauschimmel), w hen Uie while hairs are inlimalely mixcd 

 wilh the coloured hairs; lo thedapple grey horse (l'rench : gris pommelé, (ier- 

 man : .Vpfelschimmel). In ail thèse cases Ihe horse is cnlirely pignien|(>d al 

 biiih. and the skin ahvays remains pigmenteil. 



C. Leucodermia (French : tacheture) exisls in Iwo forms. 1) In palehes 

 ilM-ench: tacheture en plaques). (W) The Leucodermia is limilcd lo Ihecrnp- 

 per. to Ihe back and upper parts of Ihe Ihighs (Fremdi : lachelinc en eapara- 

 eon). (3flen, ahvays (?), Ihese hoi-ses are spotled (l-"rench : ligri'). 



1 do not know any facls reganlini^ Ihc hcrcdilary rclalionships oT ihesc 

 Iwo forms of Leucodermia. 



'k .\lbinism is very rare. Il is probably a rcccssi\e. Tlicrc is no direel 

 eonncclion bclween alliinisin, leucodermia, and leucotrichia. 



