Scientific Intelligence. 122 
parvá instruetee. | Abdomen sat breve vel mediocre. Branchie sepius 
penicillate. Pedes 2 antici oblique projecti ; 6 postici directione con- 
similes. 
- 1l. Antenne externe squamá basali non instructo. | Pedes antici non chelati. 
Fam. 1. ScvrrLARID.—Carapax valde depressus, marginibus lateral- 
. ibus sat tenuibus, carapace lateraliter subito inflexo. Antenne ex- 
"terne laminate, breves. Sternum trigonum.—GENERA: Scyllarus, 
Fabr., Arctus, D., ''henus, Leach, Parribacus, D. Ibacus, Leach. 
Fam. 2. PariNvRIDA.—Carapax subcylindricus, lateraliter late rotun- 
"datus. Antenne externe basi subcylindricz, longe. — Sternum tri- 
gonum.—JGENERA : Palinurus, Fabr., Panulirus, Gray. 
9. Antenne externe squamá basal; instructe. | Pedes antici didactyli. 
Fam. 3. EnvonxipE.—Carapax non oblongus, depressus, lateribus su- 
bito inflexis, abdomine multo augustiore.—Gzrwvs : Eryon, Desm. 
Fam. 4. Asracinz.—Carapax oblongus, subcylindricus, abdomine 
parce angustiore. Sternum angustum.——GENERA : Homarus, Edw., 
Astacoides, Guerin, (subgen. incl. Ástacoides et Cheraps, Erich.) 
Astacus (subgen. incl. Astacus et Cambarus, Erich.) Nephrops, 
Leach, Paranephrops, White. 
Subtribus III. CARIDEA vel MACROURA TYPICA. 
Carapax suturá transversá non notatus, cephalothoracem plerumque 
tegens, lateribus anterioribus liberis, epistomate non connatis. Ántennz 
externe squamá basali grandi instructz. | Corpus sive subcylindricum 
sive paulo compressum.  Branchize sepius foliosz. 
Fam. 1. CaANconrDE.—Mandibulee graciles, valde ineurvate, non pal- 
pigere, coroná angustá. Pedum pares lmi 2di inter se valde inequi. 
Subfam. 1l. CnaNcoNiNG.—FPedes lmi 2dis crassiores. — Maxil- 
lipedes externi pediformes. Digitus mobilis in palmam clau- 
dens, immobilis spiniformis. Pedes 2di non annulati.-- GENERA : 
Crangon, Fabr., Sabinea, Owen, Argis, Króyer, Paracrangon, D. 
Subfam. 2. LvsuaTIN E.—-Pedes 1mi 2dis crassiores. Maxillipedes 
externi pediformes. Manus bene didactyle. Pedes 2di annulati. 
GENERA: Nika, Risso, Lysmata, R?sso, Cyclorhynchus, DeH. 
Subfam. 3. GNATüOPHYLLINJE.—Pedes 2di 1mis crassiores. Max- 
illipedes externi late operculiformes.—GzNus : Gnathophyllum. 
Fam. 2. Ary1n;.—Mandibulz crasse, non palpigerze, coroná latá, parce 
bipartità, processu terminali brevi et dilatato. Pedum pares lmi 
2dique inter se aequi, carpo nunquam annulato. 
Subfam. 1l. ATviN;e.— Pedes thoracici palpo non instructi. —Gzx- 
ERA: Atya, Leach, Atyoida, Randall, Caridina, Edw. 
Subfam. 2. E»uvniwN E.—-Pedes thoracici palpo instructi.--Gzuus : 
Ephyra, Roux, DeH. 
