ad mer ee. he) Gat pat: 
ee 
i ee 
ia 
4 
Genera of Cyclopacea. 225 
af 
Ps 
‘Art. [X.—WNotice of some Genera of Cyyelopacea ; by J. D. — 
As a preface to the descriptions which follow, a classification 
of Crustacea is here given; it is made out so as to exhibit to some 
extent the parallel relations of the several orders and subdivis- 
ions 
CRUSTACEA. 
Subclassis I. Subclassis IT. Subclassis I 
PODOPHTHALMIA. EDRIOPHTHALMIA. MANDYATA. i 
Ordo 1. Decaropa. Ordo 1. CuorisToropa.* 
i Tribus 
1, Brachyura. 1. Isopoda, 
2. Anomoura. g, Leemipoda 
roura, 3. Amphipoda. 
Ordo 2, Scurzoropa. Ordo 2. ENToMoOSTRACA. 
Subord. 1. A. Subord.2, |__ Subord. 3. 
Se Irribus 
T Bitmmapods. aan ag Tribus 1, Cirripeda, 
2. Diplodpoda.  Dapeeee L r Galigscs a. 1. Limulacea. ° 
4, a ps 2. Lerneacea. Releuksia:% 
Ordo 3. TRILOBITA. 
Order ENTOMOSTRACA. 
Tribe CycLopacea. 
To avoid explanations in the following descriptions, we here 
enumerate the prominent external characters of this tribe. 
* From xweieros separate, and rovs foot, alluding to the fact that the pairs of feet belong 
omy toa sn eopmens of the body. 
d croua mouth, alluding to tt th being furnished with proper 
uta in maxi axillee. 
t 2 a serps — er oropa mot the mouth selon Ba the form of a movable trunk. 
pa mout the legs constituting the j word 
\| From auras a Sex ene to re opeering in which the body of the animal is 
closed 
t The aarti. young of several ‘Anette were collected and figured by the waiter, 
te e. When Set first found swi sagaatage war sis 
re taken for anew sw genus al ied to Cypris, so similar are t 
The f fact ge ee body and legs of the Tea shed their skin, is further Vlhits rg 
the propriety of — this group with nscccpney 
The pedicel of Anatifee 
pair of antenne in the young ; the enimal 
attaches itself b 
commences, and in a a group sof Anatifee all the oat stages may be observed, from the 
pair of distinct antenne to the fixed simple 
Sxconp Series, Vol. I, No. 2.—March, or 29 
