38 



MR. K. LYDEKKEK ON A NEW SPECIES OF TEIONYX. 



with the iiormai type in having but a single long neural between 

 the first pair of costals ; and no species, so far as I am aware, has 

 been named from the Maltese Miocene. An inspection of the figure 

 of the Maltese specimen will, however, at once show that it agrees 

 with the T. f/cmgeticus group in having two neurals (n' and n^") 



Pig. 1. — Upper surf ace of the anterior part of the carapace of Tvionys. 

 melitensis ; from the Miocene of Malta. (One fourth of the 

 natural size.) 



between the first costals, and that it is therefore specifically distinct 

 from all fossil species based on specimens sufficiently perfect to 

 exhibit the characteristic features of this part of the carapace. 

 From T. gangeticus and its allies it is distinguished by the greater 

 elongation of the second moiety of the divided neural (n*"), in con- 

 sequence of which the proper second neural {ir) becomes much 

 shorter, and also by the coarser sculpture. In its coarse sculpture 

 it agrees Avith T. planus., of the Hordwell beds, in which the anterior 

 part of the carapace is unknown, but is of larger dimensions. 



It has already been mentioned that in its large size and coarse 

 sculpture the fossil approximates to Chitra inclica ; and the question 

 naturally arises whether extinct species of Chitra may not, like the 

 Indian species of Trionya\ have the first neural divided. In the 

 absence of the skull it is almost or quite impossible to say whether 



