INTRODUCTION XI 



tion made this final typescript a very tedious job. Corrections were made 

 in this manuscript up to the time of going to press. (8) The data filed 

 by specialties had to be checked in detail against the specialties listed 

 under each name, and they had to be kept up to date to the time of final 

 typing. The filing arrangement had to be such that an adequate subdivi- 

 sion of specialties could be shown, with reasonable uniformity for clarity 

 of use, but without undue waste of space. (9) A preliminary manuscript 

 was then typed and checked back against the cards. (10) From this a 

 final typescript was made on the special typewriter for photographic 

 printing. This was proofread against the previous draft. (11) During 

 the final typings, a considerable number of late replies, corrections, death 

 notices, etc., reached us. Many were incorporated into the final manu- 

 script, but some could not be. These were assembled into a list of Ad- 

 denda, to be printed as a supplement. Only such persons as could be 

 added to the systematic section were put in this Addenda. A few others 

 will be accumulated for a separate Supplement, which may be published 

 elsewhere at a later date. 



ARRANGEMENT 



The systematic section is arranged by phyla and classes. The order 

 of these phyla follows closely the recent classification of Hyman (1940- 

 1959), but for convenience of reference a list is given below. The classes 

 are in alphabetical order. The term class is not to be taken strictly, as 

 some groups are admitted as classes here for convenience which might 

 be given higher or lower rank in a formal classification. In a few phyla 

 the classes are omitted, and in certain classes the orders are also used. 



ANIMALIA 



(Miscellaneous groups) 

 PROTOZOA 



Ciliata 



Flagellata 



Sarcodina 



Actinopoda 



Amoebida 



Foraminifera 



Heliozoa 



Mycetozoa 



Proteomyxa 



Radiolaria 



Rhizopoda 



Testacea 

 Sporozoa 

 Suctoria 



(Invertebrates) 

 PORIFERA 

 MESOZOA 

 ARCHAEOCYATHA 



COELENTERATA 



Anthozoa 



Conularida 



Hydrozoa 



Scyphozoa 



Stromatoporoidea 



CTENOPHORA 



PLATYHELMINTHES 



Cestoda 



Trematoda 



Turbellaria 

 (Nemathelminthes) 

 NEMERTINEA (Rhynchocoela) 

 ACANTHOCEPHALA 

 GORDIACEA (Nematomorpha) 

 PRIAPULIDA 

 GASTROTRICHA 

 NEMATODA 



