32 HULL SCIENTIFIC AND FIELD NATURALISTS CLUB. 



ton, on!)' reached by very high tides, yielded a "shrimp" 

 which I have not found elsewhere in the district. Dozens 

 were swimming round and amongst a mass of Ruppia 

 rostellata, Chcetonwrpha litorea, and Cladophora which almost 

 filled the pool, and with this as a background they were 

 dark, but as they swam into open water the colour faded 

 until thev could scarcely be distinguished from the sand. I 

 held my hand motionless in the water, and they swam up to 

 it, just as P. varians does in the Thames pools, to see if it was 

 edible, but at the least movement they darted backwards, 

 assuming a vertical position with a peculiar bend of the 

 pleon as though they were sitting on invisible chairs. As I. 

 had no apparatus, I tried to catch them by drawing them 

 slowly to the shore, but they always escaped at the last 

 moment, until I accidentally drew my hand along the bottom 

 and so pushed in front of it a gradually increasing ridge of 

 sand. This time 1 succeeded ; the shrimp evidently imagined 

 itself safe as long as it saw sand beneath it, and made no 

 attempt to escape until it was stranded on the shore. Only 

 once in half-a-dozen times did the manoeuvre fail, and I 

 caught sufficient to verify the opinion formed from its 

 behaviour, that it was Macromysis ftexuosus (J/, chameleon). 

 This pool, which was in existence in 1890, has since been 

 destroyed by the advance of the sea; and several other pools 

 here, formerly slightly brackish, are now flooded with sen 

 water at exceptionally high tides. This year (1902I I 

 obtained from them Palcemonetes varians, Neomysis vulgaris, 

 Paludestrina stagnalis, P. ventrosa, and the black sea slug, 

 Limaponlia depressa; the two crustaceans also occur in the 

 large pond on the landward side of the bank. 



After we leave the Spurn district, shore hunting is con- 

 fined to pools in the clay or groups of boulders near low 

 water mark, which ma}' remain undisturbed, sometimes only 

 for a few months, sometimes for a year or two. In this way 

 several Crustacea have been obtained at Aldborough, and 

 some mollusca at Holmpton. It is to be regretted that no 

 examination was ever made of the ruined Hornsea Pier, 

 where, sixteen years ago, we gathered mussels from the 

 barnacle -covered pillars ; the barnacles were considered 

 worthy of a place in my heterogeneous collection, and I still 

 possess specimens, with Cypriua islandica which I well 

 remember carrying home in my boots from Barmston. 



Man}' species may be obtained during the "crabbing" 

 season at Hornsea, Withernsea, and Easington. This year 

 (1902), as the Hornsea fishermen were compelled by the 



