Contents. vii 
PAGE 
On a Specimen of Sowerby’s Whale ( Mesoplodon bidens) captured in 
Shetland. By Professor Turner, . . . . . . 443 
On Respiration in the Roots of Avicennia officinalis (Linn.) and 
other Shore Plants ; with Observations on the Functions of the 
Lenticels. By Joseph Bancroft, M.D. Communicated by Pro- 
fessor Balfour, V.P., . * . . . .456 
(a) Diagnoses Fungorum novorum in Insula Socotra a Bayley Bal- 
four, Carolo Cockburn et Alexandro Scott, lectorum, quas elaboravit 
Dr M. C. Cooke. Communicated by Dr Bayley Balfour, . . 456 
(b) Diagnoses Algarum novarum Socotrensium a Bayley Balfour, 
Carolo Cockburn et Alexandro Scott, lectorum, quas elaboravit 
Dr G. Dickie, F.R.S., ...... 456 
(c) Diagnoses Lichenum Socotrensium novorum a participibus expedi- 
tion um Prof. Bayley Balfour et Dr Schweinfurth, lectorum, quas 
elaboravit Dr J. Muller. Communicated by Dr Bayley Balfour, 457 
On the Colour of the Mediterranean and other Waters. By Mr 
John Aitken, . . . . . . .472 
The Surface Geology of Mid-Lochaber. By Professor Duns, D.D., . 483 
Remarks on Dielectric Strength. By Professor Chrystal, . . 487 
Diagnoses Plantarum novarum et imperfecte descriptarum Phanero- 
gamarum Socotrensium ; quas elaboravit Bayley Balfour, Scientiae 
Doctor et in Universitate Glascuensi rerum botanicarum regius 
professor. Pars Prima, ...... 498 
On a Specimen of Balcenoptera borealis or laticeps captured in the 
Firth of Forth. By Professor Turner, . . . .515 
On Min ding’s Theorem. By M. G. Plarr. Communicated by Pro- 
fessor Tait, ........ 528 
Chapters on the Mineralogy of Scotland, Chapter VII. By Dr 
Heddle, . . . . . . . 549 
On the Dimensions of Cast Iron at various Temperatures, with more 
especial reference to the Phenomena of the Solid floating on the 
Molten Metal. By W. J. Millar, C.E., Secretary Inst. Engineers 
and Shipbuilders in Scotland, ..... 549 
On an Oxy cyanide, and a New Oxide, of Bismuth. By M. M. 
Pattison Muir, M.A., Fellow, and Prselector in Chemistry, of 
Gonville and Caius College, Cambridge, . . . .557 
Mathematical Note. By Mr T. B. Sprague, .... 566 
On the Manner in which Silicon, Phosphorus, Manganese, and other 
elements exert their influence upon Steel. By R. Sydney Mars- 
den, D.Sc., F.R.S.E., F.C.S., &c., . . . . .566 
The Effect of Flame on the Electric Discharge. By Dr A. Mac- 
farlane and Mr D. Rintoul. (Plate IV. a.), . . . 567 
Observations on Vegetable and Animal Cells ; their Structure, 
Division, and History. Part I., The Vegetable Cell. By J. Mac- 
farlane, B.Sc. Communicated by Professor A. Dickson, . . 576 
On some Points in the Anatomy of the Nervous System of the Pond 
Snails, Planorbis and Lymnseus. By F. E. Beddard, B.A., New 
College, Oxon. Communicated by Mr P. Geddes, . . 576 
