484 PROTOZOA. 
6. Cyphidi^in. Lorica inerinis non areolata, tuberciiUs obsita, pseudo- 
podio simplici dilatatq nec filiformi : 1 sp. 
II. Difflugia. Lorica varia, urceolaris aut lageniformia, interduni cur- 
vata et uncinata, nonnunquam limo incrustata, apertura frontali; pseudopodio 
simplici aut multiplici attenuato, filiformi aut ramoso. 
1. Exassida*. Lorica inermis oblonga, ovata aut subglobosa, varia, super- 
ficie laevi simplici aut irregulariter punctata, apertura dentata aut edentata ; 
a, edentata3 (Layi/nis), 14 spp. j b, dentatae (^Crosscypyxis*), lOspp. 
2. Assulina*. Lorica iuerniia oblonga, ovata aut subglobosa, varia, aper- 
tura laevi aut dentata, superficie areolarum aut assulaium seriebus ornata : 
a, edentatae {Hologlypha*), 17 spp. ; dentatae (^Euylypha) , 18 spp. 
8. Sotiyerellu* . Lorica setosa aut aculeata, oblonga, ovata aut subglobosa, 
superficie varia. Species notao omnes dentatae : 6 spp. 
4. Reticella* [Gray, Actinozoa, 1870]. Lorica inermis oblonga, ovata aut 
subglobosa, superficie sine ordine assulis, areolis, aut cellulis reticulata: 
a, edentatie (AUodictya*), 9 spp.; b, dentatae (Odontodictya*), 7 spp. 
5. Corticella*, ‘Lorica inermis oblonga, ovata aut subglobosa, simplex aut 
spiralis, crusta aliena mutabili obducta : a, edentatae (Lequereusia) , 7 spp. ; 
b, dentatae, 1 sp. 
6. Lirella*. Lorica inermis oblonga, superficie liris longitudinalibus 
ornata: a, edentatae (Cadiwn, Bail.), 2 spp. ; b, dentatae {Eucadium*), 2 spp. 
1)4 species of Diffiayia and 22 of Arcella are briefly characterized and for the 
most part tigured : the total number registered is 148. 
In the appendix to Ehrenberg’s paper (2) on the microscopical organisms 
of the sea-bottom, 90 new species of Polythalamia are briefly described, 113 
new species of Polyeyistina, several Arcellce and Eiffluyioi, &c. The following 
new genera are proposed : — 
Polythalamia : Aspidodexia (habitus Aristeroporm, spira sinistro imper- 
forato latere aperta, in dextro perforate latere obtecta) ; Bolbodium (glo- 
bosum, Globidincs affine ; ostium amplum, rotimdum, laterale nec terminate, 
cellulae involventes) ; Uemisterea (habitus Potcdi<x, latere dextro poroso, 
sinistro integro) ; Hcmisticta (ajqualis RoUdicCj latere sinistro poroso, dextro 
integro) ; Otostomum (PolymorphincB charactorcs in statu juvenili ; superiores 
cellulfe singulas inferiores ita involventes ut seriem simplicem ferment; 
apertura sub apice cellularum, renis aut auris habitu, laterali^, emarginata, 
ampla) ; Polydexta {Globiye?dnce chen'&ctevihua inatructse formaB^ quae spiram 
in sinistro et aperturam amplam in dextro latere geriint). 
PoLYCYSTiNA : Pteractis (corpuscula triradiata, irregulariter spongioso- 
cellulosa, medio concentrico, radiis apice acutis subspinosis, connecticulo 
radiorum membranaceo tenui, laxe subtiliter celluloso, apices non in- 
volvente) ; Stylactis (Ehopalastrum radiis stiliformibus nec clavatis). 
GREGARIN^. 
1. Beneden, E. van. Notice sur la structure des Gregarines. 
Bull. Ac. Belg. (2) xxxiii. p. 210, pi. 
— . Remarks on the structure of the GregaritK?, Q. J. 
Micr. Sc. xii. pp. 211-218, pi. 11. 
2 . 
