Diversity in the Scutes of Olielonia. 



21 



left in 3 specimens, while the left was three times as large as the 

 right in one terrapin. In Table V the left inguinal occurs twice 

 without the right (Fig. F) and both are found in E"os. 254 (Fig. G) 

 and 255. An additional scute in this "inframarginal series occurred 

 in one or two specimens: in 254 and possibly in N^o. 233, (Figs. G 

 and L.) 



Inter plasirals. 



The shield of Malaclemmys has normally no interplastral scute^ 

 and such a scute w^as found to be a very rare abnormality, as it 

 occurred only in ISTos. Y5 and 181. In both cases it was small and 



Fig. F. ^---\-^ Fig. G. 



Fig. D. Plastron of No. 149, showing unsyminetrical pair of inguinals. 

 Fig. E. Plastron of No. 161, showing paired inguinals. 

 Fig. F. Plastron of No. 253, showing left inguinal. 



Fig. G. Plastron of No. 254, showing pair of large inguinals and a small 

 scute anterior to left Inguinal. 



situated at the meeting-point of gnlars and brachials (Fig. H, cf. 

 Fig. B). In some species of turtles a large scute in this position 

 is a normal feature of the shield (Fig. I). I do not know of any 

 species in which characteristic interplastrals occur elsewhere. JSTew- 



