342 



G. R. Wieland — On Marine Tur 



1st epi-neural ossicle 

 2d " " 



3d " " 



3-5 

 4-5 

 3-9 



1-7 

 2-0 

 1-5 



(Thickness of 2d neural measured through carina, l-4 cm .) 



(The total height of the epi-neural ossicles is respectively, 15, 

 21, and 15 mm , the projection above the carina, 9, 12, and 9 mm .) 



Nuchal ... 



1st pleural 



2d 



3d 



4th 



5 th 



6 th 



7 th 

 8th 



(a) 

 Length 



over 

 urvatnre. 



Length of 



posterior 



sutural 



border. 



(fi) 



Median 

 width. 



__. 



[iol 



__ 



15-0 



6'5 



5-7 



18*5 



8-4 



5-5 



19-5 



8-4 



5-0 



19-5 



8'2 



49 



19-0 



7-7 



4-8 



17-5 



6'9 



4-5 



14-5 



5-1 



3-8 



11-5 



2-2 



3-8 



(The average thickness of the pleurals is 50 mm . The distance 

 between the bases of the rib-capitulae of the 7th pleurals is 4 cm . 

 The large pleuro-marginal fontanelles are approximately one- 

 half, or more than one-half the length of the pleurals which bound 

 them. The hornshield sulci, save for the notched marginals, are 

 indistinct.) 



The Plastron. (Cf. figure 7.) 



Length on median line. 

 Greatest width _ 



39± cm 

 36± 



(With added width of the inferior faces of the adjoining mar- 

 ginals, or 2 cm X 2, this measurement yields as the approximate 

 breadth of the carapace 40 cm .) 



Width (on antero-posterior line) of the marginalo- 



hyo-hypoplastral f ontanelle 5*0 



Length of hyo-hypoplastral suture 6*3 



Least width of the hyo-hypoplastral bridge ll'O 



