1560 CRUSTACEA. 



Chilian), one of Herbstia, one of Pisa, one of Epialtus. The variety of 

 Maioid forms is remarkably large. The Cancroids have not been 

 described. Epidltus marginatum is also reported from Brazil. 



2. The Peruvian Province (temperate), from just north of Payta 

 nearly to Copiapo. Length, fifteen hundred miles. The most cha- 

 racteristic species appear to be the Panopceus crenatus, Xantho crenatus, 

 and Albunhippa spinosa (another species of which genus occurs in 

 California). There also exists here, the cosmopolite Qrapsus pictus, 

 of very large size, which is rare farther south ; also Libinia rostrata, 

 Mithrax asper, Acanthonyx emarginatus, Porcellana tnitra, Paguristes 

 Weddelii; besides several Chilian species of Porcellana, and Xantho 

 Orbignii, X. Qaudichaudii, Bernhardus Edwardsii, and Pseudosquilla 

 monoceros, which are common to Chili and Peru. The Pilumnoides 

 perlatus is reported from Peru by D'Orbigny ; but we observed it only 

 at Valparaiso, where it was originally found by Poeppig.* 



3. The Chilian Province (subtemperate) . Length, seven hundred 

 miles. This province is distinguished from the Peruvian by the rare 

 occurrence of Qrapsus pictus, and the unusual number and size of the 

 species of Cancer and Porcellana, three of the former and ten of the 

 latter existing at Valparaiso. Both of these genera have been shown 

 to reach their highest developments in the middle Temperate zone. 

 Other characteristic genera are the following: — Inachoides, Acantho- 

 cyclus, Platymera, Pseudocorystes, Bellia, JEglea, Cryphiops, Pinnothe- 

 relia, and Rhyncocinetes. Epialtus dentatus, Ocypoda Gaudichaudii, 

 Qrapsus planifrons, Hepatus chilensis, and Platyonychus purpureus are 

 large and common species. The genera Ocypoda and Qrapsus are not 

 found south of the subtemperate region. Pilumnoldes we suspect to 

 be peculiar to Chili." The following are other genera represented in 

 the Chilian seas : — Libinia, Libidoclea, Ptsoides, Leptopodia, Leucippa, 

 Xantho (four large species), Panopceus, Ozius (also an Australian genus), 

 Pilumnus, Gelasimus, Gyclograpsus, Uca, Plnnixa, Leucosia, Atelecyclus, 

 Paguristes, Bernhardus, Galaihea, GalUanassa, Thalassina, Alpheus, 

 Betceus, Palcemon, Pseudosquilla, Gonodactylus. 



The Chilian province is allied to the Gallapagos through 

 Plsoides tuberculosus and perhaps, Acanthonyx Petiverii; with Brazil, 

 through Libinia spinosa; with the West Indies and Canaries, through 

 Leptopodia sagittaria. The Hepati of Chili and Rio Janeiro are 

 closely related; and we suspect that the H. chilens-is is found also at 



* Gay, in his Historia de Chile, mentions its occurrence only on the Chilian coast. 



