194 REPORT — 1875. 



Venus exoleta, Linn. Dead valves, 6 miles off Hawthorn, 20 fa. ; sandy gravel. 



Uncfa, Pult. : nir. Off Marsden, 33 fa. ; muddy sand. 



fasciata, Da. Costa,: mc. Of!" Redcliff and Robin Hood's Bay, 30 fa. ; gravelly. 



casina, Linn. : mc, and large. 14 miles off Sealiam, 35fa. ; sandy mud. 



ovata, Penn. : mc. Large, off Hartlepool and lledcliff, 30 fa. ; muddy sand 



and gravel. 



yallina, Linn. : mc. Off Redcliff, 30 fa. ; gi-avelly. 



Tapes virc/ineus, Linn. : mc. OH'Hawthorn and Castle Eden, 20 fa. ; sand and gravel. 

 Lt(cmo2}sis widata, Venn. : v. Off Hartlepool, 36 fa. ; muddy sand. 

 Tellina crassa, Gmel. Off Hawthorn, dead shells, 20 fa. ; sandy gravel. 



* tenuis, Da Costa : mr. Off Redcliff", 30 fa. ; gravel and dead shells. 



ptmlla, Phil. : mr. With the above. 



* fuhula, Gron. : mc. Large, off Seaham, 35 fa. ; sandy mud. 



Psammohia teUineUa, Lamlr. : mr. 14 miles off Seaham, Hawthorn, 35 fa. ; sandy 



mud and gravel. 



ferroeiisis, Chem. : mc. Off Hawthorn, 20 fa. ; sandy gi-avel. 



Mactra suhtnincata, Da Costa,: r. Castle Eden, 20 fa. ; gravelly. 



elliptica, Brown. Off Hawthorn and Redcliff 



« sitiltonnn, Linn. A valve, oti' Scarborough, 17 fa. ; sandy. 



Scrohicidaria prismatica, Mont. : mc. Off Seaham, 35 fa. ; sandy mud. 



aJba, Wood : r. W^ith the above. 



Solen pellucidus, Penn. 20 miles off Sunderland, 45 fa. ; muddy sand. 



* emis, Linn. A broken valve, oft' Redcliff', 30 fa. ; gravelly. 



Thracia 2}'ipnracea,Vo\i: mr. Oft' Hawthorn, 20 fa. ; sandy gravel. 



, var. villosiuscida, Macq. : r. With the above. 



Neara cuspidata, Olivi. One yoimg, covered with sand, off" Seaham, 3o fa. ; sandy 



mud. 

 Corhula gibba,0]i\\: mc. Off Sunderland and Seaham, 35-45 fa. ; muddy sand. 

 Mya truncata, Linn. Valves, and some fry between Castle Eden and Redcliff, 



20-35 fa. ; gravelly. 

 Saxicava rugosa, linn. : mc. None large, in most of the gatherings. 



arctica, Linn. : r. Redcliff, 30 fa. ; gravel and dead shells. 



*Pholas crispata, Linne. Fragment of large shell, between Castle Eden and Redcliff, 



20-35 fa. ; gravelly. 



SOLENOCONCHIA. 



Dentalium entcdis, Linn. : c, and large. Off Hawthorn, 20 fa. ; sandy gravel and 

 other gatherings. 

 * tarentuium, Lamk. : r. Small, dead, off Hai'tlepool, 35 fa. ; muddy sand. 



Gastkropoda. 



Cliiton cinereus, Linn. : r. Off Staiths, 25 fa. ; gravel and dead shells. 



marmoreits, Fabr. : r. Robin Hood's Bay, 30 fa. ; gravel and zoophytes. 



Tectura virgwea, Miill. : r. Off Castle Eden, 20 fa. ; coarse gravel. 

 £marginulajissiira, Linn. : mr. Off" Redcliff', 30 fa. ; gravel and dead shells. 

 C'aptdus hnngaricns, Linn. : mr. Small, off Seaham and Robin Hood's Bay, 



35 fa. ; sandy mud and gravel. 

 *Trockus magmis, Linn. : r. Dead, oft" Hawthorn, 20 fa. ; sandy gravel. 

 ttimidus, Mont. : mc. Off Redclift', 30 fa. ; gravelly and dead shells, mostly 



small. 



cinerariiis, Linn. : r. Off Castle Eden, 20 fii. ; coarse gravel. 



Montaniti, Wood : r. Oft' Redclift", .30 fa. ; gravel and dead shells. 



7nillegranus, Phil. : c. Off Castle Eden and Redcliff", 20-30 fa. ; gravel and 



dead shells. 

 zkyphinus, Linn. : c. OfiF Castle Eden and Redcliff, 20-30 fa. ; gravel and 



dead shells. 



* , var. Lyondi, Leach. With the above. 



*Laeuna crassior, Mont. : r. Off Castle Eden, 20 fa. ; coarse gravel. 



pallidida, Da Costa : r. Off Staiths, 25 fa. ; gravel and dead shells. 



Missoa pimdura, Mont. : mc. Oft Marsden and Seaham and Hawthorn, 20-35 



fa. ; sandy gravel. 



