86 



NOTE— CONCHOLOGY. 



Portunus pusillus Leach. I have only found this species in the 

 stomachs of Haddocks. 



Ebalia pennantii Leach. After a severe storm in winter, when 

 the sea-bottom seemed Hterally turned out upon Redcar beach, 

 I took a single dead specimen of this interesting little species. 



Corystes cassivelaunns Penn. Thrown up in quantities on the 

 sands. The curious markings of the carapace bear a ghastly 

 resemblance to the human features, and have gained this 

 crustacean the name of ' Masked Crab.' The first pair of 

 claws in the male are developed to an enormous size, but 

 whether for fighting purposes (like the horns of some mammals) 

 or to give a securer hold of the female (like the dilated forefeet 

 in Dytiscus) does not appear to be ascertained. 



Lithodes maia Leach. A grand specimen of this terrific-looking 

 creature was brouglit in in a fishing-boat one day when I was 

 on the shore at Redcar. Another specimen taken in the same 

 neighbourhood I secured for the -Yorkshire Museum. 



Pagurus bernhardus L. The Hermit Crab. Very common in 

 rock-pools, inhabiting shells of Trochus ciiierariiis^ Purpura 

 lapilhis, &c. Large specimens from deep water make them- 

 selves at home in the shells of Buccmum imdatum. 



Porcellana longicornis Penn. At spring-tides this little Crab may 

 be taken abundantly on West Scar, under stones, at dead low- 

 Avater mark. It shares with the Ophiocomas, the disagreeable 

 habit of throwing its limbs ofi" in the most reckless manner if 

 handled otherwise than most gingerly. 



Galathea squamifera Leach. At dead low- water mark on West 

 Scar, in company with the last-named species. 



Homarus vulgaris Edw. The Redcar Lobsters appear small beside 

 the productions of the south coast. 



Crangon vulgaris Fab. The Shrimp ; ver}^ common in shallow water. 



Pandalus annulicornis Leach. I have met with this species in the 

 bottoms of boats which have been fishing in deep water. The 

 same boats contain Natica alderi. 



In the pools of brackish water near the slag-banks, a small Shrimp 

 abounds, which appears to resemble PalcBvion leachii Bell, but I do 

 not feel certain about the identification. 



NOTE—CONCHOLOG K 

 Scalariform Planorbis spirorbis near Bingley.— On the 22nd 



January I obtained a living scalariform monstrosity of Planorbis spirorbis from a 

 ditch near Bingley. In shape it resembles the frustum of a cone, its altitude 

 being equal to its greater diameter increased by one half. — ^J. A. Hargreaves, 



Baildon Woodbottom, Shipley, February ist, 1887. - 



Naturalist, 



