G. C. Crick—Actinocamax from the English Chalk. 389 
hear the chuckle of Professor Lapworth when he had written ‘‘ The 
Secret of the Highlands’’; and we decide not to devote ourselves to 
rock classifications. 
So far as this history is concerned it is fairly fully dealt with up to 
1860, but after that date exigencies of space and other considerations 
have necessitated brief treatment. The volume has a good coloured 
reproduction of Buckland, carrying his well-known bag, for frontis- 
piece; while portraits are given of Babington, Greenough, William 
Phillips, Macculloch, W. D. Conybeare, Sedgwick, Murchison, Fitton, 
Serope, Lyell, William Smith, De la Beche, Godwin-Austen, John 
Phillips, Mantell, Falconer, E. Forbes, Prestwich, Jukes, Ramsay, 
Blanford, and A. Geikie. Most of these are excellent, but what effect 
John Phillips would now make if he marched down Piccadilly in those 
trousers it is difficult to imagine. Illustrations of all the medals 
awarded by the Society are given, and the volume closes with lists of 
the early members, lists of the staff, and others, and an efficient 
index. It reflects high credit on the author, and on the Society. We 
thank both, and congratulate Mr. Woodward on a labour of love 
happily conceived and admirably carried out.—S. 
Il.—Nore ox Two Rare Forms oF ACTINOCAMAX FROM THE 
Encuisa Upprr CHatk. 
By G. C. Crrcx, A.R.S.M., F.G.S., of the British Museum (Natural History). 
f|YHE present note relates to two specimens. One was obtained by 
Mr. G. E. Dibley, F.G.S., from the Mieraster cor-anguinum 
zone of the Chalk at Gravesend, and now forms part of the British 
Museum collection (register number C. 10576); the other is in the 
collection of Dr. H. P. Blackmore, F.G.S., of Salisbury (to whom 
I am indebted for the loan of the fossil), and was obtained from West 
Harnham, near Salisbury, at the base of the zone of Actinocamax 
quadratus. Being the more nearly perfect, the Salisbury specimen is 
described first. 
ActrInocaAMax BLAcCKMOREI, 1.Sp. 
Description—The specimen (Fig. 1), which is almost perfect, is 
94mm. long, and has a smooth surface; it is fusiform, and has its 
greatest thickness at a point which is a little nearer the posterior than 
the anterior end. Here the guard is depressed, its dorso-ventral and 
transverse diameters being 13°75 and 15mm. respectively. From this 
point the guard tapers evenly and slowly towards the anterior end, 
and evenly and slowly towards the posterior end, but shortly before 
the extremity is reached it contracts somewhat rapidly, and forms 
a fairly acute, almost mucronated point ; the extreme tip, however, is 
wanting. Sponge-borings can be plainly seen beneath the surface. 
Viewed laterally the ventral and dorsal surfaces of the anterior three- 
fifths of the guard are nearly parallel, the dorsal surface in this view 
appearing to be nearly straight and the ventral feebly swollen. 
Whilst the greater part of the guard is depressed, the anterior fifth is 
decidedly compressed. The truncated anterior surface is flat and almost 
at right-angles to the axis of the guard; it is oval, its ventro-dorsal 
