1420 CRUSTACEA. 



Fam. I. INACBTDiE. — Oculi in orbitis retractiles. Articulus max- 

 illipedis externi 3tius apice 4 turn gerens. Digiti acuminati. [Pedes 

 praelongi.] 



1. Macrocheirin^:. — Carapax late ovatus. Rostrum furcatum. Oculi oblongi. 

 — Gr. Macrocheira, De H. 



2. In aching. — Carapax triangulato-ovatus. Rostrum emarginatum aut integrum. 

 — Gr. Inachus, Fab., Microrhynchus, Bell. 



3. Salacin^e. — Oculi perbreves. Rostrum fere obsoletum, non bifidum. Corpus 

 non oblongum. Pedes 8 postici longi et crassi. — Gr. JSalacia, E. and Lucas. 



Fam. II. MAIIDiE. — Oculi in orbitis retractiles. Articulus maxil- 

 lipedis externi 3tius angulo interno 4tum gerens. Digiti acuminati. 



1. Oculi later a capitis insiti et plus minusve later aliter por recti. 



1. LiBiNiN^E. — Rostrum apice emarginatum. Corpus paulo oblongum, subglo- 

 bosum, lateribus altis. Oculi perbreves. Pedes sive longi sive mediocres. — Gr. 

 Ugeria, Lat., Doclea, Leach, Libidoclea, E. and L., Libinia, Lh. 



2. Mahn^e. — Carapax orbiculato-ovatus, rostro prominente profunde bifido. Pars 

 antennarum externar.um mobilis margine orbitse orta. — G. Maia, Lk., Dione, De H. 



3. Pisi]nle. — Carapax triangulato-ovatus, rostro bifido, non deflexo. Pars anten- 

 narum externarum mobilis margine orbitae exclusa, et sub rostro non celata. — Gr. 

 ParamiihraXy E., Pisa, Lh., Pelia, Bell, Lissa, Lh., Phodia, Bell, Hi/as, Lh., 

 Pisoides, E. and L., Herbstia, E., Thoe, Bell, Dehaanius, M'L. 



4. Prionorhynchiisle. — Pisinis affines. Rostrum breve, latissimum, bilobatum, 

 non deflexum. — Gr. Prionorhynchus, H. and J. 



5. Micippin^e. — Rostrum latum, deflexum. — Gr. Ilicippa, Lh. 



6. Chorininje. — Carapax triangulato-ovatus. Rostrum furcatum. Pars anten- 

 narum externarum mobilis sub rostro celati. — Gr. Chorinus, Lh., Chorilia, D., 

 Lahaina, D., Naxia, E., Scyra, ~D. } Uyastenus, White, Pyria, J). 



2. Oculi fron tales et porrecti longitudinales, carapace antice truncate-. 



7. Othonin^e. — Oculi elongati, cylindrici. — Gr. Othonia. 

 [Cujus sedis est Siphonoecetes, Kr.] 



Fam. III. MITHRACID^E.— Oculi et maxillipedes externi ac in 

 Maiidis. Digiti versus apicem excavati et non acuminati. 



1. Mithracinjb. — Oculi longitudine mediocres. — Gr. Mithrax, Lh., Mithraeulus, "W. 



2. Cyclacin^e. — Oculi longi. — Gr. Cyclax, D. 



exceeding what is found in any other genus of Maioidea. This fact, in connexion with 

 the habits of the species, and the peculiarity of the fingers, seems to require the institu- 

 tion of a distinct family of Mithracidae. 



