TKANSACTIONS OF SECTION D. 683 



Secondly : Personal nomenclature should not if possible be used. There are 

 some anatomical names which are known in every country, as ' Hunter's canal/ but 

 a great many are known only in one country. There are little nodules on the 

 margin of the semilunar valves of the pulmonary artery : some call them ' nodes 

 of Arantius,' others the 'nodes of Morgagni'; but Arantius certainly never saw 

 them. There is a prominence on the external ear of man, in Germany known as 

 * Darwin's prominence,' but in England it is often called * Woolner's tip,' and so on. 



Thirdly : No part of the body should have more than one name ; more 

 synonyms only cause confusion. This name shall always be a Latin one ; every 

 nation can afterwards easily translate it after its own fashion. Latin is the only 

 real international language, and by adopting it we hope to have a sound 

 foundation. 



Note. — Anyone who may wish to have a copy of the paper referred to above is 

 requested to apply to the author. 



2. On Fertilisation and Conjiigation Processes as allied Modes of Proto- 



plasmic Rejuvenescence. By Professor Makcds Haetog, M.A., D.Sc, 

 F.L.S. 



3. A Preliminary Classification of Sexual and allied Modes of Protoplasmic 



Rejuvenescence, ^c} By Professor Maecus Haetog, M.A., D.Sc, 

 F.L.S. 



I. The following modes of rejuvenescence occur in cellular and in certain apo- 

 cytial organisms : — 



A. Plasto&amt : the fusion of cytoplasts into a plasmodium, the nuclei 



remaining free {My.vomycetes). 



B. Kaeyogamt: the union of cells (gametes), cytoplast to cytoplast and 



nucleus to nucleus, to form a 1-nucleate cell, the zygote. The following 

 variations occur : — 



1. IsoGAMT. The union of gametes undistinguishable in size, form, 



and behaviour ; this may vary as follows : — ■ 



(rt) MxTLTiPLE : between several gametes (up to 6). 

 {b) Binary : between a pair of gametes ; 

 or, from another point of view — 



(c) Indiffeeent : between any gametes of the species. 



(d) ExoGAMOUs: between gametes of distinct broods only 



( Ulothrix). 



(e) Endogamous : between gametes of the same brood only 



(Hydrodictyon) . 



2. Anisogamy : the union of two gametes differing chiefly in size ; the 



smaller (micro-) gamete is 7nale, the larger {meyco-) gameie, female. 



3. Htperanisogamy : the female gamete, at first active, comes to rest 



before fusion with the male (Lower Melanopliycets). 



4. Oogamy : The female is never actively motile ; the male is termed a 



spermatozoon, the female an oosphere. 



From another point of view karyogamy is — 



6. ZooiDiOGAMOUs : one gamete at least is actively motile (flagellate, 



ciliate, or amoeboid). 

 6. SiPHONOGAMors : karyogamy is effected by a tubular outgrowth 



from one or both of the gametes (Phaneroyams). 



' Examples are only given in cases where it is necessary, from the introduction, 

 of new terms, or where the examples are not generally familiar. 



