46 MORPHOLOGY OF SPECIES OF THE GENUS ULEX. 



EXPLANATION OF PLATES IV. and V. 



Fig. 1. — Seed of Ulex Europceus ; n, hilum. 



,, 2. — Seed beginning to germinate ; shows where the root will emerge. 



,, 3 to 6, — Further stages in the germination of the seed of U. 

 Europccus. ct. , Cotyledons ; s. , Growing point. 



,, 7 and 8. — Young seedlings of U. Eiiropceus, showing trifoliate 

 leaves. 



,, 9. — Seedling of U. nanus, var. Gallii, with two trifoliate leaves 

 and a number of linear leaves, showing how these are 

 arranged to expose the largest leaf-surface to light. 



,, 10. — Copies of nature-printed figures, showing the process of 

 modification from the trifoliate to the spiny form of the leaf 

 of U. EuropcEus. 



,, 11. — Small portion of a branch of U. Europceus, showing a pri- 

 mary spiny branch in the axil of a foliage leaf. Between 

 the foliage leaf and the thorny branch a minute accessory 

 bud was found. The three upper foliage leaves on the 

 thorny branch bear flowers in their axils. Slightly magnified. 



,, 12. — Transverse section of a spiny branch, diagrammatic, v.b., 

 Vascular bundles ; en., endodermis ; s., strengthening tis- 

 sue ; a., assimilative tissue; e., epidermis; st., stomata ; 

 c. , large thin- walled cells, just inside the assimilative tissue. 



,, 13. — Portion of transverse section of a primary spiny branch, 

 highly magnified ; lettering same as in Fig. 12, and in addi- 

 tion, p., phloem ; ch., cambium ; xy., xylem ; h., hairs ; and 

 pc, pericycle. 



,, 14. — Figure showing the arrangement of the leaves on a primary 

 spiny branch. /., Foliage leaf of the branch on which the 

 thorn is borne. The distances between the circles indicate 

 the length of the internodes between the leaves. 



Revival of an Old Histological Method for Rapid 

 Diagnosis. — Dr. A. A. Kanthack and Mr. T. S. Pigg had found, 

 of all rapid methods of hardening tissue, that of immersing small 

 blocks in boiling water for three or four minutes, or in the case of 

 delicate tissue one minute, the most rapid. The tissue could then 

 be at once cut on the freezing microtome, and the section stained 

 well with logwood or other dyes ; or it could be preserved in 

 alcohol or Miiller's fluid, or treated by the paraflin method. For 

 rapid diagnosis in the case of surgical operations, it was particu- 

 larly valuable. — British Medical Jour7ml. 



