On the Classification of the Crustacea Choristopoda. 301 
Subtribus Il. ONISCOIDEA. 
Fam. I. ARMADILLIDA:.* 
Corpus bene convexum, stricte articulatum. Abdomen multi-articu- 
latum, segmento ultimo parvo. Appendices caudalest ultra abdomen 
non exserte, lamellatee. Mandibulz non : pigere. Antenne interne 
oa 
Subfam.1. TYLIN it Appamiicns caudales infra abdominis segmentum pos- 
ticum Ot et oper roulite rmes 
G. 1. Tyxus, Latreille. 
Subfam. 2. ee ee g§—Appendices caudales inter duo a: macs seg- 
menta postica 
Ged, ARMADILLO, it Tat, partim, Brandt, Edw,—Basis appendicum caudalium 
grandis, ramo i o parvulo, altero obsoleto, 
G. 2. Spaerii.o, a na—Basis a pendicum caudalium grandis, ramo interno 
parvulo, externo parvulo, in latere basis interiore ay apicem insito. 
; dicum bre 
Armapituipium,{ Brendi—Basis appendic ium, brevis, ramo ex- 
terno lato, terminali, interno parvulo. 
LoExocnus, Brandt 4 hill, licib dalibus similis. Seg: 
‘menta thoracis processu horizontali utringue armata. 
Fam. II. ONISCID/, 
Corpus sepins minus convexum, vel stricte vel laxe articulatum. 
Abdomen multi-articulatum, segmento ultimo parvo. Appendices cau- 
Gales valde exserte, styliformes. Mandibulz non palpigere. Antenne 
interne i Inconspicue. 
Snbfam. 1, ONISCIN 2.**—Maxillipedes. 3-articulati, articulis duobus ultimis 
brevibus et et parvalis. Antenne externe ad elecudondin 5tam bene geniculate. 
Basis caudalium perbrevis, duos stylos multum inaquos cana stylo 
interno sub Mutadiie partim celato. 
G.1. Oxtsovs, Zinn.—Antenne subcylindric, ad basin fronte partim 
tect, Flagellum +4 aceasions tt + picnic precedente vix brevius vel longius. 
Subgen, 1. oo Brandi.t{—Antenn amt 6-articulate. 
Subgen. 2. Porcerrio, Latr—Antenne itso T-a ate. 
Subgen. 3. Onn Ltr — Herbiaigin externe 8- tris 
G. 4. Putios is. Antenne externe usque ad basin aperte, 
a articulate, pa dries we, Flagellum ac agoeser 
Sei TtryArTpRus, Brandt—Antenne ext voad articulum 65tum late, 
2 externo dilatatz 
G. 6. Guerin—} lagellum antenn externarum waren) ee 
articuio precedente multo brevius, pene y 5to ceylindrico. 
* Armadillide, aa Deutschl, Crust., 34th Heft, 1840; also Cat. Brit. Crust. 
Brit Mus, 1850, 
Appendices ahh seine Gt nobis denominatwe appendices caudales ; 
‘um abdominis ee 
iens, Edw. § Armadilliens, Edw. 
Koch. ae rmadillo, Koch, et Latr. part 
Edw, Porcellionide, Cat. Brit. it. Mus. 1850. We 
it better to derive the family name from the older generic name, | s 
hos beat tains flagellum articulis min minutis 1-3 aye ot ad extrem- 
Mm confectum, ultimo styliforme et apice setigero. tt Jtea, Koch. 
