362 
BULLETIN OF THE BUREAU OF FISHERIES 
Choptank River; Mobjack Bay; Hampton, Va.; and Lynnhaven Inlet near the 
mouth of Chesapeake Bay. In addition it has been found on Smiths Island, North- 
ampton County, Va., which is just outside of the bay. Evidently this form, which, 
it may be mentioned, has a known distribution from Cape Cod to Florida and along 
the shores of the Gulf of Mexico, is a shallow-water form. 
It has been collected in Chesapeake Bay during the months of June, July, August, 
September, and December. Undoubtedly, it may be found there at other times. 
Females carrying eggs have been found during the month of July. 
Sesarma reticulatum (Say), which lives in burrows on salt marshes (Rathbun, 
1905, p. 4) and which seems to be a better-known form than the previous species, 
has not been reported from Chesapeake Bay up to the present time, although it seems 
probable that it will be. However, one specimen has been taken just outside of the 
bay at Smiths Island, Va. 
Ocypoda albicans Bose., commonly known as the sand crab or ghost crab of sandy 
shores, has made its way into the extreme southern part of the bay, and has been 
caught by those collecting for the United States National Museum, at Buckroe 
Beach, Willoughby Point, Wallops Island, and near Fort Monroe, Va. That region 
is probably near the northern limit for full-grown specimens of Ocypoda. Only the 
young have been found in New England, according to Rathbun (1905). Undoubtedly 
Ocypoda albicans is a creature of the sandy shores of the open seas where the winters 
are mild. The observations of others indicate that Ocypoda is not well fitted to 
withstand freezing temperatures, so it seems probable that the low-winter tempera- 
ture of the north is the important factor in limiting its northern range. 
Specimens have been collected in the lower bay and in the close vicinity of its 
mouth during the months of May, August, and September. However, more sys- 
tematic collecting may show its presence there in the winter time. 
So far as the records show, none of the 57 adult specimens collected from the bay 
and the immediate vicinity was ovigerous. 
The fiddler crabs are represented by three species in Chesapeake Bay : Uca rainax 
(LeConte), U.pugilator (Bose.), and U.pugnax (Smith). These shore crabs have a 
known distribution from Cape Cod to Florida and then along the shores of the Gulf 
of Mexico. Uca minax, which has been found in salt marshes and also in regions 
where the water is nearly fresh (Rathbun, 1905, p. 2), has been collected farther up 
in Chesapeake Bay than any of the other species. Specimens have been caught at 
Chesapeake Beach, Md., which is about as far up the bay as the line made by areas 
V, W, and X. Other specimens have been found along Mobjack Bay, Buckroe 
Beach, and Lynnhaven Inlet, all of which localities are in the southern part of the bay. 
None is recorded as from outside of the bay. Further investigation, probably, will 
show that it has made its way up the shores of the rivers. One ovigerous specimen 
was found during the month of July. 
The other two species of fiddler crabs, Uca pugnax and U. pugilator, have been 
collected in the lower part of the bay and outside only. An ovigerous specimen of 
U. pugilator was found during the month of July. The known distribution of these 
forms outside of Chesapeake Bay is the same as that for U. minax (Rathbun, 1900). 
Six species and one subspecies of spider crabs are listed from Chesapeake Bay 
rastellijera acuta A. M. E. (probably), Euprognatha rastellijera marthae Rathbun, and 
Hyas coarctatus Leach — are deep-water forms which have been dredged near the mouth 
in the open ocean. 
and the immediate vicinity. Four of these — Collodes robustus Smith, Euprognatha 
