Messrs. Jones and Kirkby on Carboniferous Entomostraca. 45 
_ 16. “ Cythere orbicularis. Yellow Sandstone; Bunowna, 
Kasky, co. Sligo.” Synops. p. 167, pl. 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 of L. subrecta, but nothing 
like the figure. 
17. “ Cythere pusilla.” Synops. p. 167, pl. 23. fig. 20. 
“ Yellow Sandstone; Cullion, 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- 
conchus (?) or a Cypridella. Prof. M’Coy refers to it as “ the 
smallest of the Cytheres” ... “ greatly abundant”... “length 
about 3 line” (p. 167). 
18. “ Cythere scutulum. Middle Carboniferous Limestone ; 
Ballintrillick, Bundoran, co. Donegal.” Synops. p. 168, pl. 23. 
fig. 21 ; Local. p. 75. Dark, compact, but softish, fissile shale, 
with Crinoidal joints, casts of Aviculopecten, &e. 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 (1-4; 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. “ Cythere oblonga. Yellow Sandstone; Cullion, Drapers- 
town.” Synops. p. 167, pl. 23. fig. 22; Local. p.48 (“ Arena- 
ceous. shale,” Local. p. 100). Dark-grey, fine-grained, fissile 
shale, with Aviculopecten. Obscure casts of Leperditia subrecta(?), 
but nothing that matches the figure. “ C. oblonga” is stated 
to be “common,” and about 1 line in length. It is probably 
L. subrecta. 
20. “ Cythere spinigera.” Synops. p. 168, pl. 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 imcrustation, 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. “ Cythere trituberculata. Yellow Sandstone; Cultra, 
Holywood.” Synops. p. 168, pl. 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 ; 
