7iew or little-known Gouiatitcs/z-ow Ireland. lol 



Horizon and Locality. Carboniferous Limestone : Kildare, 

 Jreland (? Rathkeale, Go. Limerick, Ireland). 



Prolccanites Leesoni, sp. n. (Fig. L5.) 

 Sp. char. Siiell discoidal, compressed, rather narrowly 

 umbihcated ; greatest tiiickness at the margin of the umbili- 

 cus, about one third of the diameter of the shell ; height of 

 outer whorl about four ninths of the diameter of the shell. 

 Whorls (? number); inclusion three fourths; umbilicus 

 shallow, with subangular margin and sloping sides, about 

 two sevenths of the diameter of the shell in widtli. Whorl 



Fiir. 15. 



Prolecanites Leesoni. — «, lateral view of the type specimen ; b, front view 

 of the same. Carboniferous Limestone : Glenbane East, Limerick, 

 Ireland. Drawn from an example in the collection of the Ueoloo-ical 

 Survey of Irelantl, Dublin. About three fifths natural size. 



subtrapezoidal in cross-section, its width about three fourths 

 of its height ; indented to about two sevenths of its height by 

 the preceding whorl ; periphery somewhat imperfectly defined, 

 very feebly convex, somewhat flattened ; umbilical zone 

 narrow, well defined, sloping towards the centre of the umbili- 

 cus. Body-chamber apparently occupying nearly the whole 

 of the last whorl ; aj)erture not seen, but (judging by the 

 growth-lines) the peristome probably nearly straight on the 

 lateral area, and with a fairly wide and moderately deep 

 hyponomic sinus. Chambers (? depth) ; suture-line not seen. 

 Test nearly smooth, with subregular growth-lines, which 



