Tate — List of Irish Liassic Fossils. 19 



14.— Leda v-scripta, nov. spec, Plate I. fig. 5. 



Shell elliptical; anterior portion rounded, ventricose; posterior elongated, 

 rostrated; ventral margin strongly arched; medial portion of shell ornamented 

 by plications en chevron; the rostral and anterior extremities with oblique plaits. 



Geological Position. — Zone of "A. angulatus" Waterloo, Larne. Very 

 rare;(/?. T.) 



15. — Leda Bronni, Andler, Neues Jarbuch f. Min., p. 642(1858). See Plate 

 I. fig. 1. 

 Nucula palmce, Quenstedt, Jura, t. 13, fig. 42, p. 116, non t. 23, figs. 

 16.-17., t. 44., fig. 8. (1858). 

 This species resembles L. snbovalis of the Middle Lias, from which it is 

 especially distinguished, as pointed out by Andler, in the greater gibbosity of 

 the umbonal region. It is common in the Zone of " Belemnites aczitus" at 

 Ballintoy, and occurs in the inferior zones. I have recorded it in England 

 from the Zone of " Ammonites Angulatus" at Marton, Lincolnshire. 



16.— Leda Quenstedti, nov. spec, Plate I. fig. 4. 



Nucula inflexa, Quenst., Jura, t. xiii., fig. 41, p. no (1858). 



This species has been confounded by Quenstedt with L. galathea, d'Orbigny, 

 a moderately common shell in the Middle Lias of England, France, and 

 Germany, from which it is distinguished by its more robust and less injequi- 

 lateral form, and -in the abruptly truncated posterior extremity. 



Geological Position — Zones of " A. planorbis" Garron Point, and "A. 

 angulatus," Island Magee, Co. Antrim (P. T. ); Upper part Lower Lias, 

 Ballintoy, Co. Antrim {R. T. ) ; and Ofterdingen, Wurtemburg ( Quenstedt. ) 



17. Leda Renevieri, Oppel, Die Juraf., p. 95 (1857). See Plate I. fig 3. 



Nucula complanata, Quenstedt, Jura, t. 13, fig. 39 ; p. no (1858). 



The shell represented by fig 3, differs in a few particulars from the 

 ordinary form of L. tenuistriata, Piette, but may be a young state of that species. 

 Quenstedt's figure, which I have referred to, evidently represents the same 

 species, which may be the one described by Oppel, in the following terms : 

 — " Resembles L. complanata, Goldfuss, but does not attain the same size, and 

 the anterior prolongation is shorter." 



Geological Position. — Zone of " A. Bucklandi," Glynn, near Larne (P. T.) 

 Recorded by Oppel in the Zone of "A. angulatus," and by Quenstedt, from 

 the upper part of the Lower Lias in Swabia. 



18. Cucull^a Grangeri, nov. spec, Plate I. fig. 12. 



Cucullcea cucullata, Portlock, Geol. Survey of Derry, p. 120. 

 Shell ovate-rhomboidal, ventricose, rounded in front, and obliquely trun- 

 cated behind, bluntly keeled from the umbo to the posterior angle ; umbones 



