CHIEFLY IN NORTHUMBERLAND AND DURHAM. 371 



conspicuous when seen from below (fig. 10). Animal unknown. 

 Length, -3-0-th of an inch. 



One specimen only dredged by Mr. Jeffreys, in St. Magnus 

 Bay, Shetland. 



Paradoxostoma Hodgii, nov. sp. Plate XII., figs. 12, 13. 



Carapace as seen from the side elongate subarcuate ; greatest 

 height situate in the middle and not much exceeding one-third 

 of the length, extremities narrowed, rounded ; superior margin 

 boldly arched, inferior sinuated in the middle, curving gently 

 upwards behind : seen from above much compressed, linear 

 ovate, widest in the middle, tapering gradually and evenly to 

 the extremities which are subacutely pointed ; width scarcely 

 exceeding one-fifth of the length. Shell smooth and polished, 

 transparent, yellowish, the limbs of the animal showing plainly 

 through. Length, 4ioth of an inch. 



I have much pleasure in dedicating this species to Mr. George 

 Hodge, of Seaham Harbour, in recognition of the kind assist- 

 ance which he has often afforded me, as well as of his numerous 

 contributions to the zoological literature of this district. 



Cytherura insolita, nov. sp. Plate XIII. , figs. 11, 12. 



Carapace as seen from the side oblong, subquadrangular, 

 highest in the middle ; greatest height equal to about half the 

 length ; anterior extremity rounded, posterior almost rectan- 

 gularly truncate and produced at its upper extremity into a 

 slender acutely pointed process ; superior margin evenly arched, 

 inferior almost straight : seen from above the outline is com- 

 pressed, subcuneiform, obtusely pointed in front, centrally mu- 

 cronate behind ; greatest width behind the middle, equal to not 

 much more than one-third of the length. Shell-surface smooth, 

 distinctly and rather largely punctate behind the middle ; colour 

 yellowish, central areola almost black. Length, lArth of an iiicli. 



Dredged by Mr. D. Robertson, oft" Orkney. 



