Jones AND Kirxsy—On Carboniferous Ostracoda from Ireland. 191 
“variety” bipartita, with its three lobes and three ridges (Ann. Mag. Nat. Hist., 
loc. cit., figs. 8 a, b), show a central pit (which is obsolete in some Kirkby) ; but 
the outline and the beridged surface agree with the features of K. oblonga; and 
ridges become special features in X. plicata. Therefore the Kirkbyan alliance is 
evident, as well as the Beyrichian feature of lobulate surface. Hence its 
appellation as connecting the two genera. But further, in Drepanella,* Ulrich, 
1890 (Journ. Cincinn. Soe. Nat. Hist., vol. xiii., p. 117), a strong curved ridge, 
variable in development, lies between the variously tubercled part of the surface 
and the ventral and end margins. In Bollia, a curved ridge on the ventral region 
unites the two lobular ridges ; but is sometimes obsolescent, leaving the essentials 
of Ulrichia (two distinct tubercles) apparent. 
In our ‘ Kirkbya annectens” the two lobules are significant of an Ulrichian 
alliance ; but modified by their deliquescence into mere swellings of the two sides 
of the medial sulcus, as in Primitia. If the valves were furnished with a marginal 
fringe and with a dorsal ridge (as well as the sub-central longitudinal ridge), 
S. annectens would come within the limits of our Beyrichiopsis, Geol. Mag., 1886, 
p. 434. Indeed its alliance with this genus seems to be stronger than with any 
other. 
In more than one direction, then, the name annectens has a significant meaning ; 
and we therefore propose for this interesting Paleeozoic Ostracod a new generic 
name, indicative of its connective character, viz. Synaphe, from ovvadn, ‘ connec- 
tion’ or a ‘joining together.’ 
This species is known to us from Cultra, Co. Down; Dromard, Co. London- 
derry ; and Largamore, Co. Mayo; also from Lanarkshire and Linlithgowshire, in 
Scotland; all in Lower Carboniferous beds. 
28. Ulrichia bituberculata (M‘Coy). 
(Plate xt1., figs. 20 a, 4, ¢.) 
1844. Cythere bituberculata, . M‘Coy, ‘‘Synop. Charact. Carb. Foss. Ireland,” 
p. 165, pl. xxii, fig. 10. 
1866. Beyrichia bituberculata, Jones & Kirxsy, Ann. Mag. Nat. Hist., ser. 3, vol. 
XViil., p. 43; Quart. Journ. Geol. Soc., vol. xli., 
p. 511; 1867, Trans. Geol. Soc. Glasgow, vol. 
ii., p. 220; 1887, Proceed. Geol. Assoc., vol. ix., 
p- 506. 
This neat little sub-oblong bilobed form is comparable with Airkbya rigida, 
Jones & Kirkby, 1885, Ann. Mag., ser. 5, vol. xv., p. 188, pl. iil, figs. 18 a, 4, as 
* There is a Drepanella from Boghead, Scotland, in Dr. David Robertson’s collection. 
2G2 
