40 MR. T. BELL ON THE CRUSTACEA 
Classis CRUSTACEA. 
Subclassis DECAPODA. 
Ordo Bracuyura. 
Tribus OxyrHYNCHI. 
Familia Leptoropiapa#, Bell. 
Genus Lepropopia, Leach. 
Lepropopia Saeittaria, Leach. 
Mus. Soc. Zool., Bell. 
Found by Mr. Cuming at Valparaiso. 
Genus Euryropius, Guer. 
Euryropius Larreriui, Guer. 
Mus. Soc. Zool., Bell. 
Found at Valparaiso by Mr. Cuming, and at Rio Janeiro by Mr. Miller. 
Those procured from the latter locality were more than twice as large as those from 
the former place. 
Familia Matap& (Matens, Edw.). 
Genus MicroryyNcuus. 
Testa subtriangularis, posticé rotundata, anticé rostro brevissimo terminata. 
Oculi pedunculo elongato mult crassiores, retractiles. 
Orbita supra unifissa, extrorsim unidentata. 
Antenne exteriores ad latera rostri insertz, articulo basilari rostro paullo breviore. 
Antenne interiores in fossula integra, anticé aperta, et ad apicem rostri feré attinente, 
locate. 
Pedipalpi ewterni caulis interni articulo secundo cordiformi, anticé emarginato. 
Pedes antici MARis corpore vix longiores, reliquis multo crassiores, digitis arcuatis ; 
F@MIN#& minimi: pedes octo posteriores subconsimiles, corpore feré duplo longiores, 
unguibus leviter curvis. 
Abdomen Manis 7- F@MIN# 5-articulatum (hujus articulis tribus ultimis conjunctis). 
The genus thus characterized agrees in several remarkable and important relations 
with Camposcia: a comparison, however, of its structure with the essential characters 
of the latter genus, will warrant the step I have taken in forming a new genus for the 
two beautiful and very peculiar species about to be described, especially as they both 
agree in all the most striking and obvious characters in which each of them differs from 
Camposcia. The exact situation of the present genus it is perhaps not easy to ascertain. 
Ss lf ela 
