. 120 Scientific Intelligence. 
The following are the families thus deduced, with the genera a 
Corystoidea and their characteristics. 
Fam. I. TRICHOCERIDA. 
Carapax forma Cancroideus, fronte non rostratus. Antenne intern® 
longitudinales. Antenne externe breves, flagello parce piloso. Max- 
illipedes externi super epistoma non producti, sed margini are buccalis 
bene adaptat 
Gen. sia DeHaan, *—Frons dentatus. Articulus maxi 
pedis externi 3tius apice truncatus. Articulus antennarum 
ternarum Imus elongatus, hiatum orbite bene occupans. 
Fam. II. THIIDA. 
Carapax suborbicularis, non oblongus, fronte non rostratus. Antet- 
ne interne transverse vel oblique. Antenns-externe breves, flagella 
parce piloso. Maxillipedes externi super epistoma producti. 
Gen. 1. =. » Leach.—F r s integer, arcuatus. Antenne intern® 
transverse. Pedes nulli ‘aioe: Articulus a ex 
terni rise vix oblongus 
en. 2. Kraussta, Dana.t Carapax paulo transversus, m 
‘itemise brevi, fronte denticulato, medio em agione “Ae 
nnew interne obli iquee edes 8 postici natatorii, tarso falei- 
fori. Articulus maxillipedis externi 3tius vix oblongus. 
Fam. Ill. CORYSTIDA. 
Carapax sive suborbicularis sive multum angustus, fronte plus mi 
nusve rostrato. Maxillipedes externi super epistoma producti. 
1. Pedes nulli natatorii. 
ae ‘Tenwessvs, White. + —Carapax parce transversus, ee me 
diu 
Soalaratg externarum. Imus elongatus, processu elongato hia 
tum orbitee bene occupans. Articulus maxillipedis externi Siius 
a omega apice triangulatus, articulum 4tum prope apice™ 
Gi 2. ae ELECYCLUS, Leach.§—Carapax fere orbicularis, lateralitet 
arcuatus, fronte paulo producto. Articulus antennarum € 
* Faun. Japon. (1833), p. 1 
Ad 
), 
18, 
spe a Xantho Peng Hee DeHaanii, (Faun. a 66, pe 
£0) Platyonychn hum rugulosum Kraussii (“Siidaf. Geist” Se tab. 1, £.5), Thise 
et re us “ Kraussia” pa E see est. Platyonycho “titerepat mst 
gine post lore quam antero- paulo jag its 
bil — et a flagello antennarum internarum anes Trichooer? 
porcellana (A. White, “ Voy. gry De Kraussii differt # 
A. White, “Ann, N ot . 
40%, 1846; V 5 oS rang, 14, tab. 
at. Hist.,” xvii, es marin ab 
pre 
§ Chlorodius De DeHaanii, Faun. Japon. 18. 
