336 ]\[isceUaneous. 



of England, My attention was drawn to it by a letter from Mr. VV. 

 Hearder, of Plymouth, which appeared in the 'Field' and other 

 newspapers of Au«;ust 27th, and in which the fish is described as 

 the " Glaucus" (Z^it;7t?a (/?«»crt). However, on being kindly shown 

 the fish by Mr. Hearder, I recognized it as a Vadigo. 



The preservation of this specimen is due to the Very Rev. Canon 

 H. H. Da Boulay, of Prussia Cove, Marazion, who states that it was 

 caught on August 23rd in a pollack-net off Prussia Cove. The disco- 

 verer generously at once acceded to my request of depositing it in 

 the British Museum. The fish is in excellent condition and nearly 

 of the same size as the one obtained in 1888, viz. 19 inches. 



I may mention on this occasion that during the summer of the 

 present year fresh specimens of Cenfrina Salviani were exposed for 

 sale in the markets of London as well as Plymouth. As one or two 

 individuals of this shark are known to have been caught on the 

 British coast some years ago, it is of importance to know that the 

 specimens of the present year were not British, but, as Mr. Calder- 

 wood, the Director of the Laboratory of the Marine Biological 

 Association, informs me, were brought by trawlers who fish in or 

 about the Bay of Biscay, carrying their fish into British ports. 

 Exposure for sale in a fresh state in the London markets has ceased 

 to be evidence of a fish having been obtained within the British 



P.S. — Mr. G. A. Musgrave, Pres. Torquay Nat. Hist. See, has 

 kindly informed me that two other specimens of the Vadigo were 

 obtained on the South Devon coast simultaneously with the Cornish 

 specimen, viz. in Babbicombe, and the other in Oddicombe Bay. 



On the Stridulating-apparatus of the Red Oajpode Crab. By 

 A. Alcock, M.B. 



Several years ago Professor Wood-Mason demonstrated to me the 

 fact, that in both males and females of the red Ocypode crab that 

 swarms on all the sandy shores of India, the bigger of the two chelte, 

 or nippers, bears across the " palm " along finely-toothed ridge, and 

 on one of the basal joints of the " arm " against which the " palm " 

 can be tightly closed, a second similar ridge ; and that, when the 

 " palm " is so folded against the base of the " arm," the first ridge 

 can be worked across the second, like a bow across a fiddle — only in 

 this case the bow is several times larger than the fiddle. 



The remarkable resemblance of the whole arrangement to the 

 stridulating-apparatus of many insects, led Professor Wood-Mason, 

 who is an authority on the subject, to infer a similarity of function ; 

 and Professor Wood-Mason requested me to observe the crabs during 

 life, and to listen for the sounds which he supposed them to be 

 capable of producing. I have this season heard the sounds, and I 

 am now able to give the actual facts that establish the truth of 

 Professor Wood-Mason's a ^j)n'ori inference. In order to understand 

 the value, and what may be called the evolutional coeflScient, of 



