MULLER'S CLASSIFICATORY SYSTEM. 



199 



succinctly indicated in connection with the abbreviated diagnoses of the 

 subordinated family and generic groups in the tabular forms prefixed to the 

 succeeding descriptive accounts of each more important group. So far as 

 practical, the family names given in the systems of the earlier authorities 

 quoted have been retained, with the simple adaptation of their terminal 

 syllables in conformance with the recommendations of the British Associa- 

 tion contained in their "Rules for Zoological Nomenclature" issued in the 

 year 1878. In face, nevertheless, of the vast augmentation of specific types 

 collected from every available source, many of them now figured and 

 described in this volume for the first time, a corresponding increase of the 

 number of family and generic titles has been unavoidable. Taken in their 

 entirety, no less than nine hundred infusorial species, distributed among 

 about eighty family and three hundred generic groups, are embraced by 

 the author's system, being a sum total of more than double the number 

 included in any previous treatise. 



O. F. MtJLLER, ' Animalcula Infusoria,' 1786. 



INFUSORIORUM DIVISIO METHODICA. 



I. ORGANIS EXTERNIS NULLIS. 



* Crassiusatla. 



Gen. I. MoNAS : punctiforme. 

 „ 2. Proteus : mutabile. 

 „ 3. VoLvox : sphaericum, 

 ,, 4. Enchelis : cylindricum. 

 „ 5. Vibrio : elongatum. 



** Membranacca. 



Gen. 6. Cyclidium : ovale. 

 ,, 7. Paramecium : oblongum. 

 ,, 8. KoLPODA : sinuatum. 

 „ 9. GoNiUM : angulatum. 

 „ 10. Burs ARIA : cavum. 



11. ORGANIS EXTERNIS. 



* Nuda. 



Gen. I. Cercaria : caudatum. 

 „ 2. Trichoda : crinitum. 

 „ 3. Kerona : corniculatum. 



Gen. 4. HiMANTOPus : cirratum. 

 „ 5. Leucophra : ciliatum undique. 

 „ 6. Vorticella : ciliatum apice. 



** J'esta tecta. 

 Gen. 7. Brack lONUS : ciliatum apice. 



