Messrs. Jones and Kirk by on Carboniferous Entomostraca. 45 



16. " Cy there orbicularis. Yellow Sandstone; Bunowna, 

 Easky, CO. Sligo.^' Synops. p. 167, pi. 23. fig. 19 ; Local, p. 48 

 ("Carboniferous slate/' Local, p. 100). Dark-grey, fine-grained 

 limestone, with Orthoceras, &c. There are some small, obscure, 

 roundish fossils, and a part of a valve oi L. subrecta, but nothing 

 like the figure. 



17. " Cy there pusilla." Synops. p. 167, pi. 23. fig. 20. 

 "Yellow Sandstone; CuUion, Draperstown, co. Londonderry," 

 Local, p. 48. " Middle Limestone," Local, p. 100. We have 

 not had the specimen. It may have been a very small Entomo- 

 conchvis (?) or a Cypridella. Prof. M^Coy refers to it as " the 

 smallest of the Cytheres " . . . " greatly abundant " . . . " length 

 about i line" (p. 167). 



18. " Cy there scutulum. Middle Carboniferous Limestone; 

 Ballintrillick, Bundoran, co. Donegal." Synops. p. 168, pi. 23. 

 fig. 21 ; Local, p. 75. Dark, compact, but softish, fissile shale, 

 with Crinoidal joints, casts of Aviculopecten, &c. Leperditia 

 Okeni, var. subrecta and Scotoburdigalensis are here plentiful, as 

 single valves, of various sizes. Some have the eye-tubercle ; and 

 occasionally large left valves (l-yi^- inch long) have their peculiar 

 dorsal swelling. C. scutulum is doubtless Leperditia subrecta, 

 Portlock, sp. The figured specimen must have had its dorsal 

 edge partly imbedded, and the proportions are not well given. 



19. " Cy there oblong a. Yellow Sandstone; Cullion, Drapers- 

 town." Synops. p. 167, pi. 23. fig. 22 ; Local, p. 48 ("Arena- 

 ceous shale," Local, p. 100). Dark-grey, fine-grained, fissile 

 shale, vv'iih. Aviculopecten. Obscure casts oi Leperditia subrecta{^), 

 but nothing that matches the figure. " C. oblonya " is stated 

 to be "common," and about 1 line in length. It is probably 

 L. subrecta. 



20. " Cy there spinigera." Synops. p. 168, pi. 23. fig. 23. We 

 have not seen the specimen; but there is no doubt that it is 

 Leperditia Okeni (probably var. subrecta), either with the eye- 

 spot prominent, or with a small incrustation, such as we have 

 seen in one of the specimens from Cultra, and such as we believe 

 fig. 12 (" C. cornuta") and fig. 24 ("C. trituberculata ") to have 

 borne. 



21. " Cy there trituberculata. Yellow Sandstone; Cultra, 

 Holywood." Synops. p. 168, pi. 23. fig.24; Local, p. 48 ("Arena- 

 ceous shale," Local, p. 100.) Hard, grey Serpula-grit, like 

 No. 9, but more solid. We can find nothing like the figure 

 (probably a small Leperditia with adventitious concretions or 

 bits of the matrix). L. Scotoburdigalensis is present; also a 

 Cythere having an outline somewhat near that of the figure; 

 and there are numerous •specimens of Kirkbya annectens, which, 

 though more or less lobed or tubercled, is not at all like fig. 24. 



22. " Cythere gibberula. Middle Carboniferous Limestone; 



