J14 MKRISTIC VARIATION. [PART I. 



234. Dog : large skull, having /> *~~~-. , all the normal teeth being 



in place, of proper form and size, standing evenly without crowding. 

 O. .M.. 17- SO. 



23 j. Dogs. h 345 skulls were 1 1 cases of supernumerary premolar in 

 tin- uj'i'f r jaw, viz. 



on both sides, 1 case, 



on right side, 7 cases, 



on left side, 3 cases. 



These were all cases described by HEXSEL as instances of the presence 

 ..f ;/" of his notation, i.e. a tooth between p l and canine. HEXSEL, 

 J/../7>/i. Jahrb., 1879, v. p. 546. Out of 650 skulls, including Hansel's 

 :'. l.'i, IS had two anterior premolars as described, on both sides in upper 

 jaw. XKHUIXG, Xitzb. natnrf. Fr. JJerL, 1^82, p. 66. 



English Spaniel : oittxidf and anterior to right P_ l is a worn stump, probably of 

 au extra tooth (?). B. M., 166, j. 



J.'il!. Deerhound : tiro alveoli where ,7i should be; probably two distinct teeth stood 

 h.'iv. inn it i< i">--il>le that the two alveoli were for distinct roots of a single tooth. 



c. M., '.''.'i. n. 



Division of p*. 



- : >~ Sledge-dog, ( Ireenlaud : all teeth normal except left upper 

 //-'. This tooth normally of course has two roots. Here it is 

 r.-pr.-.-iit.-d by two distinct teeth, each having one root. The 

 anterior ha- a fairly sharp cusp, but the posterior has a rounded 

 emu ii. Tin- teeth are in perfectly good condition and do not 

 look worn. The\- aiv separated from each other by a considerable 

 diastema. It apiH'ar- d^ai- that insti-ad >f the normal p*, two 

 distim-t ircth have ln-cii t'ui'ined. 0. M., 1787 (compare C. 

 viverrinus, No. i'^7 . 



Absence of /V^-///., /<//.-. 



A. WILD CAN i U.K. 



C. corsac : y, 1 ali.-M-iit on liotli .-ides without trace. GIEBEL, 

 Bronn's l\'. it. O/-/., .Mannn. ]>. I'.ni, STote. 



C. occidentalis : ,, absent on both sides. C. .S. ^1., G29. 

 C. vulpes: in ML' skulls: 



/' all-cut t'l-oln both -idi-s 1 rase, 

 <lo. left 1 .. 

 do. ., ,, rurht 1 



y,' ., both .. 1 



do l.-ft ., i' 



d" ri-jht ., I' 



Hi s-i i., .I/../-////. ./ '//////., ls7'.t, p. ."i|s A doubtful case of absence of 

 If ft pi. I!. M.. 17.\ c. 



