782 REPoRT—1899. : 
but the observations of Albrecht, although somewhat disconnected, are worthy of 
consideration. It will be remembered, however, that the sternum is in its incep- 
tion very intimately connected with the rib arches, to which the ribs are hinged, 
and which, with the spinal column, form the fixed bars on which the ribs swing, 
and is, as nearly as possible, the result of the fusion of the lower ends of the ribs to 
form a beam, from which the ribs are afterwards segmented and made to swing on 
the sternal and dorsal hinges, whilst two rows of (lateral) centres of ossification 
lead, in the course of development, to the solidification of the sternum. The sym- 
physial cartilage, in man at least, presents occasionally for observation a pelvic 
fissure. 
5. A few Notes on Rhythmic Motion. By Professor R. J. ANDERSON. 
6. The Crystallisation of Beeswax and its Influence on the Formation of 
the Cells of Bees. By Cuartes Dawson, F.G.S., &c., and 8. A. 
Woopueap, B.Sc., F.C.S. 
The hexagonal arrangement of the cells of bees has been generally ascribed to 
a structural instinct of bees; the object of this paper is now to show that the form 
of the bee-cell is chiefly influenced by a kind of crystalline formation due to the 
cooling of the wax. 
7. Report on Photographic Records of Pedigree Stock. See Reports, p. 424. 
SATURDAY, SEPTEMBER 16. 
The following Reports were read :— 
1. First Report on the Plankton and Physical Conditions of the 
English Channel.—See Reports, p. 444. 
2. Report on the Occupation of a Table at the Zoological Station at Naples 
See Reports, p. 431. 
3. Report on the Occupation of a Table at the Marine Biological Laboratory, 
Piymouth.—See Reports, p. 437, 
MONDAY, SEPTEMBER 18. 
The following Papers and Reports were read :— 
1 The Development of Lepidosiren paradowx. By J. GRAHAM KERR. 
2. Animals in which Nutrition has no Influence in Determining Sex. 
By James F, Geman. 
The edible mussel (Mytilus edulis) may be found at all different levels between 
moderately high and low tide marks, ‘he individuals are fixed, and feed only 
