124 



MERISTK VARIATION. 



[ I'AHT I. 



it. In thi> it is peculiar. Four specimens shewed the following 

 arrangement 



II . Lori-ilium N". 1. First caudal is the 36th vertebra (Troschel). 



fliit.. L'. 37th (Baur). 



// lum NTo. 1. 38th (Shufeldt). 



litt.. No. 'J 39th (Baur). 



B.u-ii, G., ./. ofMorph. iv. 1891, p. 335. 



BATKACHIA.' 



Rana temporaria. In the normal frog there are nine 



sep vertebrae in addition to the urostyle. A specimen is 



d' Tili.-d l.v i;m KNE having 10 free vertebrae (Fig. 11, III.). The 



a\i- nii'l thinl \. it. lira bore tubercles upon the transverse pro- 



l.-rli.-i|i- r--|>r<-.>fiitiiii, r a partial bifurcation of the kind 



I.-- -i ill. il in Nu. ."is. Tli-- ninth M-rtL-bra was abnormal in having 



gapophyses, and in ihar its centrum presented two concavities 



v 



^ afS> 



HI 



11 ' 'I. Vertebral colomna of Frog (JZana temporaria), after BOUKKB. 



' " liiiviii.- tr;ni^vrr>(. iirocesses borne hv tin' atlas, tom'th.T witli 



other abnormalit ii.nl in tf\t No. 58. 



II N"i ni.tl \".'|-trl.r;il <'ciliiinii 



S|..vim.'ii liii\in.- t.-n free vertebra, .1. jorib -.1 in text, No. -36. 



I ri'k'n-l tli:it tl..- ! ,iin/ ..ii this Mll,j.rt ];it,']v ]Mll,li,l,,. 1 l by Al.OLPHI 



Jahrb., ivj, ,i,. ,,. 818, appeared too Int.- t.. permit me to incorporate 

 the valuabli I icta it contains. 



