208 



HARDWICKE'S SCIENCE-GOSSIP. 



occurs, while at Margate they are often very depressed. 

 Phasiandla pidla ; very common. But none of the 

 specimens that I have found are large. Lacuna 

 crassior ; at Shellness this species is not rare, and I 

 found a number between Ramsgate and Pegwell Bay. 

 L. pallidula, var. neritoidea ; common at Margate, 

 but only during the spring and winter months. 

 Littorina obtusata ; extremely common on the rock all 

 round the coast. L. rudis ; all round the coast, but 

 rather local. L. litorca ; everywhere. Rissoa parva, 

 var. intcrrupta ; very abundant in shell-sand all the 

 year round. R. membranacea ; rare. Margate and 

 Shellness. R. striata; with R. parva, but less 

 common. Hydobia ulvce ; can be picked up by 

 handfuls at Pegwell Bay, and is also abundant in the 

 salt marshes at St. Nicholas. Sea/aria communis; 

 now and then at Shellness, but usually worn and 

 chipped. S. daihraiula ; all round the coast, but 

 larger at Shellness than elsewhere. Odcstomia lactea ; 

 common in shell-sand at Margate and Shellness. 

 Natica catena; abundant at Shellness, and very 

 occasionally at Margate. N. nitida ; this species 

 seems commonest between Broadstairs and Ramsgate. 

 Adeorbaris subcarinatus ; two specimens in shell-sand 

 at Margate. Lamdlaria pcrspicua ; Margate and 

 Shellness, but this species seems very rare. Vein- 

 Una lavigata ; Pegwell Bay and Shellness. Pegwell 

 Bay, however, seems the more favoured locality. 

 Cerithium rcticulatum ; Margate and Shellness in 

 shell-sand, but generally worn and broken. C. 

 reversum ; this uncommon species occurs with the 

 last, and I have found a fine specimen at Shellness. 

 Buccinum undatum ; all round the coast. Murex 

 erinaceus ; all round the coast. Fusus antiquus ; 

 with B. undatum, but not nearly so common. It 

 often reaches a considerable size. Purpura lapillus ; 

 wherever the coast is rocky. At Shellness I found 

 some worn specimens of the var. major. Nassa 

 reticulata ; not very common, but occasionally all 

 round the coast. N. incrassata ; abundant every- 

 where. Defrancia linearis ; Margate and Shellness, 

 occasionally in shell-sand. Pleurotoma septangularis ; 

 two specimens only at Margate. P. rufa ; plentiful, 

 especially at Shellness. P. turricula ; this species, 

 though not nearly so common as the last, is by no 

 means rare. Cyprcea Europcca ; very plentiful every- 

 where, as is also the spotted variety. Ulriculus 

 obtusus ; Margate and Pegwell Bay. At the latter 

 place I have met with large specimens. Actaon 

 tornatilis ; an immature specimen from Margate. 

 Philine aperta ; one specimen only from Shellness. 

 Melampus myosotis ; this species occurs in the rejecta- 

 menta of the Stour at Shellness and Reculvers. 



Freshwater Species. 



I have found Spharium corneum, Pisidium 

 amnicum, Bithynia tcntaculata, B. Lcachii, Valvata 

 piscin alt's, V. cr is tat a, Planorbis corneus, P. com- 



plaualus, P. contortus, P. carinatus, P. vortex, 

 P. uaulileus, P. albus, Limncea stagnalis, and 

 L. peregm, in the rejectamenta of the Stour. Spha:- 

 rium lacustre occurs at Minster and St. Nicholas. 

 Anodonia anatina at Minster. Bithynia Leachii at 

 Minster, St. Nicholas, and Ebbsfleet. Planorbis 

 lineatus, P. spirorbis, P. nitidus, and P. complanatus 

 at Minster. P. corneus and the scarce var. albus 

 at Minster and St. Nicholas. Litnna-a glutinosa 

 L. peregra, L. stagnalis, and L. palustris at Minster 

 and St. Nicholas, and the var. alba of L. palustris 

 at Minster and Sandwich. 



Terrestrial Species. 



Succinea putris and S. elegans attain a large size at 

 Minster. Zonites nitidus is more or less common 

 wherever there is water, such as at Minster. Helix 

 nemoralis, H. Cantiana, H rufescens, and H. hispida, 

 are common at Minster. Helix virgata is general. 

 //". ericetorum occurs at Margate with H. pulchella, 

 and H. Cartusiana is abundant on the sand-hills near 

 Sandwich, with a small var. of H. caperata. In shell- 

 sand on the shore I found Vertigo minutissima and 

 Carychium minimum ; and Pupa marginata is general, 

 with its var. cdentula. (Journ. Conch., April.) 



Sydney C. Cockerell. 



Glen Druid, Chislehurst. 



MICROSCOPY. 



Mounting Insect Organs. — The stings must be 

 soaked in strong solution of potassic hydrate, or 

 even boiled in it, which renders them transparent in 

 a very short time. When transparent enough they 

 must be mounted in Canada balsam, after being 

 washed first with hot water to remove the potash, 

 and afterwards, when dry, with turpentine. If 

 W. B. wants to know how to mount them in Canada 

 balsam he had better read Martin's "Manual of 

 Microscopic Mounting " or, if he wants a smaller 

 book, " Half-hours with the Microscope " by Tuffen 

 West, as it is a very long business to explain. — 

 R. A. R. Bennett. 



A good Cement required.— Gold size made 

 into a thick paste with lamp-black makes an excellent 

 cement for securing slides ; gold size alone answers 

 very well, but is so liquid that it is liable to run into 

 the balsam, as M. D. observes. — R. A. R. Bennett. 



Microscopical Query. — I should be much 

 obliged for information on the following points. The 

 best method of illumination of viewing of, e.g. 

 Stephanoceros with high powers to bring out detail ; 

 a horn to retain in a position (extended) for drawing 

 with camera lucida — E. F. B. 



A Substitute for a Revolving Table. — 

 Nothing is more wearisome when one is entertaining 

 one's friends with the microscope, and without the aid 



