Paheozot'c Bivalve I Kntomoatraca. G'J 



4. Pn'niiti'a In vi()ut<t (SaiulLergcr, ^IS.), sp. n. 

 (IM." VII. fi-s. ;ja, L) 



Lt'n).Mli. Ilt'ifrlit. Thickness of carapace. 



iiiilliiii. niilliiii. inilliin. 



•!» -55 -4 



Scaphoid in outline, witli straiglit back, obliquely curved 

 ventral margin, semicircular hinder and contracted front 

 margin, sloping upwards (broken). Sulcus on the anterior 

 third, relatively large. Surface gently and uniformly convex, 

 smooth, as far as shown by the small remaining patches of 

 the test. 



This occurs, together with Aparchites reticidatus (fig. 4) , 

 in the little piece of thin Upper-Devonian limestone from 

 Armenia, referred to at page 01. 



5. Entomis serratostriata (Sandberger). 

 (PI. Vll. iigs. Qa.Qb.) 



Length, Ileiglit. Thickness of carapace, 



miliim. millini. luillini. 



1-6 -95 -(J 



Ann. & Majj. Xat. Hist. ser. 0, vol. vi. 1890, p. 320 (for synonyms), 

 pi. xi. figs. 1 a, b, 2 a, b. 



The form of these little fossil valves is so often and so much 

 modified by pressure that it is difficult to define their exact 

 shape. The specimen here figured is probably as near to the 

 original torm as any we have met with. 



It occurs (with Spirigeriiia reticularis? and Pterinea ventri- 

 cosa ?) in a dark grey Upper-Devonian Limestone (weathering 

 ferruginous), from Cabicres, near Montpellier, France. 



G. Barychilina? semen, Sandberger, ^IS., sp. n. 

 (Pi. VII. figs. 5 a, bb.) 



Lin;j-th. Height. 



niilliui. niillim. 



■do •() 



This little oval striated valve has the aspect of being a near 

 relative to Entomis serratostriata, but it has no furrow, only 

 a central pit, and its superficial ornament differs in havin<i- 

 rows of definite meshes between the striiu, some rectangular in 

 single rows, and some in double rows, witli a line of an<'-ular 

 (vandyke) junction. This ornament reminds us of that of 

 Entomis [Barychilina?) variostriata^ Clarke (Ann. it Mag. 



