292 NATURAL HISTORY SOCIETY OF DUBLIN. 
No nucleus nor contractile vesicle detected, either in this or the two 
latter forms referred to Pleurophrys. 
I have much pleasure in naming this form after my friend, Prof. E. 
Perceval Wright, in whose company the first examples I saw were met 
with, and along with whom the most recently seen near Kenmare were 
taken. 
Measurements, .—Length of test about zoo » breadth about =4,”, but 
slightly variable in dimensions. 
Localities. —‘* Feather-bed Bog,” county of Dublin; ‘‘Glen-ma-lur,” 
county of Wicklow; a boggy place on the road between Killarney 
Lakes and Kenmare; as yetrare and local, but doubtless more widely 
distributed. 
Affinities and Differences.—I am not aware of any monothalamian 
Rhizopod with two apertures for emission of pseudopodia; but there is 
no doubt a great affinity to such a form as Pleurophrys? amphitremordes 
(mihi), but I never could detect any neck to the test, however short in 
that form, yet in the present it is often obscured by foreign particles, 
and one of the apertures may even be shut up by their presence in abun- 
dance. The contents, however, are seemingly always green, and the 
larger foreign particles distributed to the margin of the test; the pseu- 
dopodia, too, are finer and longer than in P. amphitremordes. From the 
type or genus which seemingly must be admitted to be represented by 
Diplophrys (Barker), the present is distinguished by its test being covered 
by foreign particles, quite as decidedly, seemingly, as Difflugia from 
Arcella, as Pleurophrys from Plagiophrys, as the group Lituolida from the 
group Gromida. The whole aspect of the forms I have put forward 
under this genus and Pleurophrys seems to me to be quite distinct, as I 
have mentioned, from Gromida or the Difflugic. 
Genus, Diaphoropodon (Arch.). 
Generie Characters.—Rhizopod with a nucleus, gwing off pseudopodial 
processes of two kinds—the one from the anterior end, long, pellucid, and 
retractile ; the other given off from the body, short, pellucid, and persistent, 
enclosed in a test formed of foreign particles loosely agglomerated. 
Diaphoropodon mobile (Arch.). 
Pl. X., fig. 6. 
Specific Characters.—Rhizopod large, egg-shaped, nucleus large, gra- 
nular in appearance ; anterior pseudopodia often very long, much branched, 
hyaline, very contractile ; marginal ones short, fringe-like, hyaline; ante- 
rior extremity sometimes showing a marginal pulsating vacuole ; test 
brownish, but formed of very heterogeneous particles (including protocoe- 
caceous cells) and diatomaceous frustules. 
Measurement.—In length averaging about ;4, 
Locality. —A single pool (in a single spot ‘ot 4 in ‘‘ Glen-ma-lur 
Valley,” county of Wicklow; hence as yet very rare. 
Localities and Differences. “No other Rhizopod, I believe, shows the 
curious fringe-like processes; otherwise this form resembles some of 
