182 THE ZOOLOGIST. 



The colour is greyish or pale yellowish brown, some specimens 

 having a mottled appearance. 



In the report of the British Association, 1867, this crab is 

 recorded as occurring off the French coast, attached to the under 

 side of the Hawk's-bill Turtle. In 'Cornish Fauna' it is 

 recorded as being a "stray inhabitant" of the coast of that 

 county. It is also recorded from the Devon shores by the 

 Devon Association.* 



In November, 1881, we received, through the kindness of Mr. 

 Stephen Clogg, a remarkably fine specimen which that gentleman 

 obtained amongst the stalk-barnacles upon a balk of timber that 

 had been thrown up on the shore at Looe, Cornwall. The 

 specimen, which is exceptionally large, is seven-eighths of an inch 

 each way over the carapace. In the present volume of ' The 

 Zoologist' (p. 118) Mr. Cornish records the capture of seven 

 specimens near Penzance, from amongst soil and sea-weed 

 growing on a derelict cask of paraffin found floating at sea. 

 Mr. Cornish having kindly presented to us two of the specimens, 

 we find them smaller and darker than that above recorded. 



Genus Ebalia, Leach. 



This genus, which is a very decided one, includes three 

 species that are not only British, but in all probability peculiar to 

 our seas; for M. Milne-Edwards in his description of them does 

 not give any other locality. They are commonly known as the 

 " Nut Crabs," and their generic characteristics ai'e as follows : — 



The carapace is roughly diamond-shaped, with the angles 

 rounded or elevated, the size of it rarely exceeding five-eighths 

 of an inch by half an inch. The anterior pair of legs more or less 

 robust in the different species, as we shall describe. Antennse 

 very small, as also are the eyes. Abdominal segments seven in 

 number in both sexes. 



* Grapsus pelagicus, Prideaux. The reference to this crab occurs 

 in 'Cornish Fauna' (p. 74), where Mr. Couch says: "A species of the genus 

 Grapsus is in the Athenaeum at Plymouth under the name of G. pelagicus 

 by Mr. Prideaux, and known to Dr. Leach, but not in any published work. 

 It is understood that the collection in the Museum of that Institution is 

 confined to the specimens taken on the borders of Devon and Cornwall." 

 This is now usually considered by carcinologists to be a variety of Planes 

 Linnceana. 



