46 Messrs. Jones and Kirkby on Carboniferous Entomostraca. 
Ballintrillick, Bundoran.” Synops. p. 166, pl. 28. fig. 25; Local. 
p. 75. Darkish grey micaceous shale, with Aviculopecten. The 
specimens are of the same form as “ C. scutulum,” and are de- 
eidedly Leperditia Okeni, var. subrecta (about ='; inch long). 
“ C. gibberula” is said to occur “in great numbers in the shale 
of some localities.” The figure indicates a large hump on the 
middle of the valves, which Prof. M‘Coy notes as remarkable ; 
but the specimens before us are not characterized by any parti- 
cular protuberance. 
The following labelled specimen accompanied the others. 
23. “ Cythere subrecta (Portlock, sp.). Yellow Sandstone ; 
Larganmore, Bangor, co. Mayo.” Griffith’s List of Localities, 
Geol. Soe. Dublin Journ. vol. ix. p. 48  (‘‘ Arenaceous shale,” 
Local. p. 100). Hardish dark-grey micaceous shale, with abun- 
dant small obscure casts of Leperditia Okent, var. subrecta (about 
z's inch long) 
The foliowing table shows the conclusions we have arrived at, 
judging by evidences and probabilities, respecting the Bivalve 
Entomostraca figured in pl. 23, ‘Synops. Charact. M. Limest. 
Foss. Ireland ?— 
Dimensions | No. in 
in lines. |this art. Corrected Names, 
Prof. M‘Coy’s Names. 
Entomoconchus Scouleri. 
Fig. 4. Entomoconchus Scouleri| 10x 9 1 
5. Daphnia primeva ...... 13x ¢ 2 | Cypridina primeva. 
6. Bairdia curtus ........064. 1 3 | Bairdia curta. 
i: STAINS roe snny ss ene 3 4 |B. subcylindrica, Minster, sp. 
8. Cythere amygdalina...... 3 5 | Leperditia amygdalina. 
9; ATGUATA tes acceecee st 2 6 | L. Okeni, Minster, sp., var. 
subrecta, Portlock, sp. 
10. —— bituberculata ...... 3 7 | Beyrichia bituberculata. 
11 COStata ese-ss0>m oon 3 8 | Kirkbya costata. 
12. COPTER’ * Seisvece v3 1 9 | Leperditia Okeni, Miinster, 
: sp., var. subrecta. 
13. elongata .......0s0s: 5 10 oA 3 
14. EXCAVALA, snc .cc.e0e. = 1] = - 
V0 ee einen t cscs, ] 12 5 2 
16. UMAPTEGS Se) ens socee = 13 | Beyrichia (2). 
7. INMAED coe ceseer cones: ie 14 | Entomoconchus (?) vel Cypri- 
della (2). 
18. WNONMATH, fecpsceaciacs 3 15 | Leperditia Okeni, Miinst. sp., 
var. subrecta; vel var. 
Scotoburdigalensis. 
ee orbicularis ......... it 16 | Cypridella (?). 
20. US abs seston tddass 3 17__| Entomoconchus (?) vel Cypri- 
della (2). 
21 Say AH Weegee ner 1 18 | Leperditia Okeni, Miinst. sp., 
var. subrecta. 
22. oblonga ............ 1 19 F fi 
23. —— spinigera ............ 1; 20 5 a 
24 trituberculata ...... oy 21 - e 
25. —— gibberula............ a 22 aS B 
