1564 CRUSTACEA. 



Delaware Bay, New York, Connecticut, Rhode Island. Length, six 

 hundred and fifty miles. It corresponds essentially to the Pennsyl- 

 vanian Province of Milne Edwards ; a name not here adopted, since 

 the state of Pennsylvania has no part in the coasts, it being entirely 

 inland. The giant Homarus, Lupa dicantha, Pilumnus Harrisii, Cancer 

 Sayi, and G. irroratus, Libinia canaliculata, Panopceus Herbstii, and P. 

 limosus, Platyonychus ocellatus, Gelasimus vocans, Bemhardus pollicaris 

 and B. longicarpus, Palcemon vulgaris, with Sesarma reticulata (a 

 southern species), occur in this province. 



The province strongly contrasts with the same province across the 

 Atlantic in the fewness of its species. Only two Maioids (exclusive of 

 the subfrigid Hyas coarctata, and one of the two Mithrax hispidus, is 

 properly a southern species) have been reported from these shores, 

 with seven Cancroids, two Grapsoids (one a Pinnothera), three Ano- 

 moura (a Hippa and two Bernhardi), and three or four Macroura 

 (besides Astaci). There is still one point of resemblance between 

 the two regions, in that Carcinus mcenas is common to both ; also, the 

 genus Homarus has a species in each, and so also the genus Cancer. 

 But America has no Xantho north of Florida, while this genus on the 

 other side of the Atlantic reaches to the shores of Britain. Again, 

 we have species of Patwpcei, extending even to the subfrigid region, 

 none of which group occur in the British Seas. 



3. The Nova-Scotia Province (subfrigid) extends from Cape Cod 

 to the eastern cape of Newfoundland. Length, nine hundred miles. 

 Cancer irroratus, Pilumnus Harrisii, Carcinus mamas, and occasionally 

 Pandalus annulicornis, Hlppolyte aculeaUis, Crangon vulgaris, and C. 

 boreas, Lithodes maia, Hyas coarctata, Bemhardus streblonyx, occur on 

 this coast, besides other species mentioned above as belonging to the 

 Virginian province. We begin to find a resemblance to the Northern 

 European and British shores. 



III. SOUTH TEMPERATE SUBKINGDOM. 



We know little of the Crustacea of this coast of South America. 

 According to the temperate regions, there are four provinces. Two are 

 north of the La Plata, and may be called the Provinces of St. Paul 

 (four hundred and eighty miles long), and Uraguay (three hundred 

 and sixty miles) . The mouth of the La Plata from Maldonado, around 

 by Montevideo, Buenos Ayres, to the south Cape, C. Antonio, consti- 



