1851.] 



247 



The Committee to which was referred Mr. Dana's communication, 

 reported in favor of its publication in the Proceedings. 



Conspectus Crustaceorum qua in Orbis Terrariim circumnavigatioiie, Carolo 

 Wilkes e Classe ReipubliccB Faderatae, Dace, lexit ct descripsit J. D. Dana. 



Descriptio Familiarum Subfamiliarum Generorumqne Crustaceorum Grapsoi- 

 deorum in Ephemeride Scientiarum Americana Sillimani, vol. xii, p. 283, anno 

 1851, auctore edita. Synopsis brevis Familiarum et Subfamiliarum sequens : 



CRUSTACEA GRAPSOIDEA, (Cyclometopa, Edwardsii.) 



1. ArTICULUS MaXILLIPEDIS ExTERNI 4tUS ANGULO 3t1I INTERNO ARTICULATL'S. 



Fam. I. GoNOPLACiDvE, vel Grapsoidea Cancridica. Gen. Eucrate De Haan, 

 Curtonotus De H. {P seudorhomhila, Edw.), Gonoplax Leach. 



2. Articulus Maxillipedis externi 4tus angulo 3tii interno non articulattjs. 



Fam. II. MACROPHTHALMIDiE. 



Sub-fam. 1. Macrophthalminae. Gen. Cleistostoma) De H., Maeropkthalmus, 

 Latr. 



Subfam. 2. Ocypodinae. Gen. Gela.iimus, Latr., Helacins, Dana {Gelasimum 

 cordiformem amplectens), Ocypoda, Fabr., Scopimera, De H. 

 Subfam. 3. Dotinae. Gen. Doto, De H. 



Fam. III. Grapsid^. 



Subfam. 1. Grapsinae. Gen. Pseudograpsvs, Edw., Eriockeir, De H. (Utica, 

 White), Platyiiotus, De H., Brachynotus, De H., Trichopus, De H. {Varuna, 

 Edw.), quorum maxillipedibus externis vix hiantibus ; Grapsus, Lamk., Gonio- 

 grapsus, Dana (Graps. cruentatum, messor, etc., amplectens), Fla7ies Leach {Nau- 

 tilograpsus, Edw.), irewj^ra^s?^^, Dana {Cyclograpsus partim, Edw.), Cyrto- 

 grapsus, Dana, maxillipedibus externis rhomboidice hiantibus. 



Subfam. 2. Sesarminae. Gen.,Sesarma, Say {Pachysoma, De H.), Sarmatium, 

 Dana, quorum, articulo maxillipedis externi 3tio apicem rotundato ; Cyclograp- 

 sus, Edw. (Gnathochasmus, M'Leay), Cliasmagnathus,Y>Q H., Helice, DeH., 

 quorum articulo maxillipedis externi 3tio apicem truncato et ssepe excavato. 



Subfam. 3. Plagusinae. Gen. Acanikopus, De H. {Plagusiam clavimanam 

 amplect), Plagusia, Latr. 



Fam. IV. Gecarcinid^. 



Subfam. 1. Ucainae, Gen. TJca, Leach, Gecarcinucus , Edw., Cardisoma, Latr. 

 Gecarcoidea, Edw. 



Subfam. 2. Gecarcininae. Gen. Gecarcinus. 



Fam. V. PinnotheridjE. 



Subfam. 1. Pinnotherinae. Gen. Pinnothera, Latr., Fabia, Dana, Xenoph- 

 thalmzis, White, Xanthasia, White, Pinnixa, White, Pimiotherelia, Lucas. 



Subfam. 2. Hymenicinae. Gen. Hymenosoma, Leach, Hallcarciiius, White, 

 HyTfienicus, Dana, Elamena, Edw. 

 Fam. VI. MvcTiRiDiE. Genus Myctiris. 



