338 On some Palceozoic Ostracoda. — Jones. 
2. KLCEDENIA SIMPLEX. Sp. IIOV. Fig. 14. 
This small subquadrate valve, represented by a cast only, 
has at first sight the look of a Frimitia, but the characteris- 
tic sulcus is wanting, and an isolated tubercle or minute lobe 
occupies its ])lace. Possibly this may be a young individual 
of eiihev a I^lcecle)iia or a Beyrichia. The Beyrichian lobes 
and sulci are not developed ; and it may be possible that the 
little lobe is that of a Klcedenia, very near the dorsal margin, 
but more than usually isolated. . The nearest published form 
is one of the Acadian specimens of Beyrichia kloedeni, var. 
acadica Jones. "Ann. Mag. Nat. Hist." ser. 6, vol. iii ( 1889 ) 
p. 380. pi. 17, fig. 4; but the individual under notice has, I 
think, a closer alliance with Klcedenia than with Beyrichia^ 
the little subcentral lobe being nearer to the dorsal margin, 
and the other lobes less developed, than in the Acadian speci- 
men. Kl. simplex is in the dark mottled limestone from the 
Limestone-shales of the Cheraung-Catskill beds (Upper Devo- 
nian of the U. S.), at King's Mill, Perr^y county, Pennsylvania. 
3. BYTHOCYPRis FAVULOSA. Figs. 1 and 2, a. b. c. 
These small specimens are only casts, and are doubtfully 
referred to Bythocypris, as the genus most convenient to 
receive them according to their subovate-oblong shape.^ The 
hollow cast, fig. 2a, and another similar but imperfect cast 
show a coarsely reticulate or honeycomb-like structure (figs. 
2b, 2c), which holds the place of the external surface of the 
valve. This is not an unusual ornament of some ostracodous 
valves ; but it is here very coarse in projoortion to the area of 
the valve, and it is unusual in such simple cypridiform 
species as the Bythocypris^ &c. One specimen is about 
1 mm., and the other a little more in length. From buff-col- 
ored non-calcareous shale of the Marcellus limestone,^ Perry 
county. Pa., near New Bloomfield. 
4. BOLLIA UNGULA (Clavpole MS.) Figs. 10-13. 
For notes on the genus Bollia, see "Ann. Mag. Nat. Hist." 
ser. 5, vol. xvii (1886), pp. 360 and 406. Prof. Clay pole's speci- 
mens are well preserved casts in buff-colored, non-calcareous 
'■* Fur some other Pula'ozoic Ostracodes referable to this genus, see 
the "Annals and Mag. Nat. Hist." ser. 5, vol. xvni (1886), pp. 25ii, &c. ; 
and vol. xix (KS87), pp. 18-J, &.c. 
^In the Hamilton group of the Upper Helderberg (Middle Devonian 
oftheU. S). 
