Scientific Intelligence. 118 
restantes, depressione ad eos recipiendos parce concavá: tarsis styli- 
formibus, unguieulatis, spinis infra armatis, paris postici apice setis 
longiusculis instructis.— T y pus est Monolepis spinitarsus, Say. Hic per- 
tineret quoque JMeg. mutica, Desm., si ejus pedes postici setis longius- 
culis confecti ; aliter genus novum instituendum. Verbum ** Marestia" 
Desmarest commemorat clarissimum. 
3. MEGaLoPa. Leach.—Carapax fronte simpliciter rostratus, rostro 
vix deflexo, acuto. Pedes 8 postici ad basin infra uni-spinigeri ; 5ti 
minores tarso styliformi.—Typus Meg. Montagui, Leach.* 
4. CvrLENE, Dana.—Carapacis frons. uti in JMMegalopa. Pedes 8 
postici ad basin infra uni-spinigeri; 5ti minores, tarso anguste lamellato, 
setis longiusculis partim ciliato. 
5. TaiBOLA, Dano.—Carapax fronte horizontalis, tricuspidatus, rostro 
(vel cuspide medianá) tenui, cuspidibus externis vix longiore. Antenne 
interne inter rostrum et cuspides externas aperté inflexze. | Pedes pos- 
tici minores, tarso unguiculato setisque longis non instructo. 
List of new species of Megalopidea described in this paper :— 
Marestia elegans, M. atlantica, M. pervalida ; Monolepis orientalis ; 
. Oyllene hyalina, C. furciger; 'lribola lata, T. pubescens. 
MACROURA. 
In the account of the Macroura, this tribe is arranged anew, several 
new genera are added, and 59 new species described. n citing the 
general remarks, the writer and author here makes a single modifica- 
tion, which consists in removing the Pensus group from the Caridea, 
and making it a distinct subtribe. 
We follow De Haan in placing the genus Galathea with the Ano- 
moaüra ; and near it we arrange /Eglea, which widely differs from most 
other related species in having penicillate instead of foliose branchize, 
The Macroura, excluding these groups, includes three distinct sec- 
tions or subtribes, pertaining to two series. 
The first series includes the ** Fossores" of authors, or the 'Tua- 
LASSINIDEA, which have close relations on one side with the Paguri, 
and on the other with the Squillida. They constitute a line of grada- 
tion between these extremes, independent mostly of the other Macroura, 
and osculating only with the Astaci, although removed from them in 
general habit and structure. "There is a diversity among the legs as to 
form and position, which is not found in any other Macroura, and calls 
to mind the Paguri. Moreover, there is in general a looseness of struc- 
ture, a length of abdomen, and sluggish habit of body, unlike the trim 
compact forms of the typical Macroura. The anterior feet are thrown 
directly forward, and are thus fitted for the burrowing habits of the 
species. ' 
'The second. series embraces the remaining Macroura. "There are 
three grand divisions or subtribes included in the series—a superior, a 
typical, and an inferior. 
"The first is somewhat Brachyural in its characteristics, and is made 
up of the AsracrpEA. Their relation to the Brachyura and their cephalic 
* Malae Pod. Brit, pl 16. Leach describes three other species (not noticed by 
Edwards,) in Tuckey's Exped. to the Zaire, (London, 1818,) p. 404. The A. Cran- 
chii may be a true Megalopa; the others have a deflexed beak. 
