30 



Animals in Massachusetts. 



Oniscus. 



asellus, L. O. affinis, S. Wood Louse. 

 Armadillo. 



vulgaris, Latr. A. pilularis, S. 

 ORDER VI. — BRANCHIOPODA. 

 Branchipus. 



one or more species. 



ORDER VII.— PCECILOPODA. 

 Limulus. 



polyphemus, L. Horse-shoe. King-crab. 



The preceding Catalogue of the Crustacea differs materially from that in the 

 first edition. Besides being somewhat enlarged, more extended observations and 

 investigations have enabled us to make several corrections, and to offer, with 

 more confidence of its accuracy, the whole list. It still remains far from com- 

 plete, especially as regards the smaller individuals. We have been obliged to rely 

 chiefly on Mr. Say's papers in the Journal of the Academy of Natural Sciences 

 for descriptions; and although we have adopted his names, we are not satisfied 

 that he has always referred his species to the right genera, whether of Leach 

 or Desmarest, the two greatest authorities in Crustacealogy. The objects we 

 have examined differ in general from his descriptions by being of a much, larger 

 size. We have also added synonyms in a few instances, believing that 

 those Crustacea, described by Mr. Say as new, are either identical with, or very 

 closely allied to European species already described. 



All the species enumerated are in the Cabinet of the Boston Society of Natural 

 History. 



VII.— ARANEIDES. Latr. 



THE SPIDERS. 

 BY PROFESSOR N. M HENTZ. 

 The following catalogue embraces a wider field than Massachusetts. 

 The species, indeed, have been obtained from various parts of the United States. 

 This arose from a misapprehension on the part of Professor Hentz of the precise 

 object I had in view. Yet I did not think it important enough to request him to 

 alter the list.* The interesting notes which accompanied this catalogue, being too 

 extended for this place, were forwarded to the editor of the American Journal of 

 Science, and published in the 21st volume of that work. The whole paper forms, 

 indeed, a valuable monagraph of the Spiders of the United States. 



Oletera. 



Carolinensis. 



nigra. 

 Filistata ? 



hibernal is 

 Dysdera. 



teterrima 

 Segestria ? 



pumila. 

 Herpyllus- 



ecclesiasticus. 



ater. 



cruciger. 



ornatus. 



bilineatus. 



bicolor. 



descriptus. 



variegatus, 



