-218 



MKKI-TK. 1 VARIATION. 



[PART i. 



on both sides, and this tooth is present as a large tooth 

 with apparently three roots. In the lower jaw there is noextr.-i 

 li, lint the molars are considerably larger than those of a 



m 



2. :.d 



252 



;:;. < -HIM azara . I. :m.l II. Itight upper and lower jaws of the specimen 

 ! -i-i il>i d in N". -I s . s-licwin/ tlie extra upper molar and the correlated enlarge- 

 ' ' . III. ami IV. are taken from a normal specimen of slightly 



' ', c:miH"i:il trrtll. 



'1'lii- ti, kiii'lly drawn for me liy Mr J. J. Lister. 



normal speeimrn < Kig. 4o ). In the figure, side by side with the 

 ;<>! h ut' tin- alnioniial form. an- shewn the teeth of a normal skull 

 whieh w.-is -.lightly larger than the abnormal one, for comparison. 



C. magellanicus : >]irriiut>n having JiT* on both sides. B. M., 46. 

 1 1 . .". '.' ( iiiri,i ii.ncil l.y 1 1 rxi.Kv, /. c. |. 



C. cancrivorus. The ..uly -kulls of this species seen by me are 

 those in I',. M. < if these n<- ^kull with lower jaw, one skull without 

 l<>\\er ja\\ . .-iiid one lower jaw without skull, ha\e ninnerically the 

 noiinal dentition nf Cants, Init of these, one has ri^ht m 8 much larger 

 than corresponding left looth. The following were abnormal: small 

 tuliereiilar m * on l.oth Cities, u]']ier series normal, I!. .M., 1033, l>, and 

 also 15. M.. 1033, C, (Fig. t I. 11.) mentioned l,y H t \i.i;v, ' I. c. 



Specimen haxini,' upju-r series and left lower series normal. On 

 inner -ide of ri^ht , and as it were ^rowin^ out from this tooth is a 



I-i- im <lniil.t tin' -kull (1. --i-ril'.'d \<\ van .l.-r H,H.\I:N. ],///. h. Ah. ll'<-t.. 

 . n. 1866, PI Bee Hrxi.r.v. /'. /.. S., 1880, \<. ^x. 



