No. 473] 



NOTES AND LITERATURE 



383 



set, but did not find so much as a dead carapace. Mr. Cushmaii, 

 however, after considerable hunting, managed to secure a t'( w li\ iii<: 

 specimens at Manomet Point. Farther north they seem fo liavi- Ix cti 

 for the time exterminated. 



It is unfortunate that accurate dates cannot be given for the first 

 appearance of this crab at the various stations where it has been taken 

 north of Cape Cod. All the data I can offer on this point are: (1) 

 my impression that they first appeared at Cohasset about 1893; (2) 

 the statement of Mr. Stephen Decatur that he began to notice them at 

 Kittery, Maine, at about the same time; (3) the negative evidence 

 that the species is not included in Professor Kingsley's " Invertebrata 

 of Casco Bay" published in 1901 ; and (4) the fact that my uncle. Dr. 

 W. S. Bryant, who did considerable collecting and dredging at Colias- 

 set about twenty years ago, had never seen them there. 



From these data it appears that the extension of the green crab s 

 range from Cape Cod to at least as far north as Kittery, Maine, oc- 

 curred very rapidly; that it worked its way slowly aloni: the sliorc 

 from the neighborhood of Kittery; and that it is not yet pciinaiK iuly 

 established north of Cape Cod. 



At Cohasset this last summer, 1905, I found a few dead iminaiuiv 

 specimens washed up, and on November 19, 1905, Mr. 'I\ Harlx.iir 

 and I collected several living specimens, some nearly full iriowii, in 

 tide pools on one of the other reefs. There is hope, therefore, thai 

 it may again, after a few favorable .seasons, become connnon north 

 of Cape Cod. 



The green crab is found in tide pools, along the edge of mud llais. 

 on beaches, and under overhanging rockweed. It does not seem to 



