4r) I Miscellaneous. 



to form whore possible a special genus for each species the prospect 

 of being obliged to return to the old generic namea indicated 

 becomes constantly greater. 



It is an arbitrary proceeding to lay down 1758 and 1819 as 

 limits of time from which the law of priority shall commence to 

 apply : what really matters is the signitication of the old names. 



If investigators of the importance of a Leuckart and others did 

 not resuscitate these old names, they must have had their reasons 

 for the course that they adopted ; they, too, must surely have con- 

 sidered such a procedure as a step in the wrong direction. 



In strange contrast to the endeavours to replace later names by 

 old ones are the equally frequent attempts to substitute quite recent 

 names for the latter. 



The genus I'etrahothriuni, Rudolphi, with the t5-pical species 

 cylindraceum. End., and macrocephaliim, Rud., has been broken up 

 and replaced by Prosi7iecoco{)jJe, Monticelli and Fuhrmann, and 

 Bothriotcenia, Lonnberg. As a reason for this proceeding it is 

 asserted that Diesing has employed the designation Tetrahothrium, 

 Eudolphi, in a sense different from that in which it is used by 

 Kudolpbi, but this, however, in no way concerns the latter and his 

 genus. 



The old and well-characterized genus Amphistomnm, Rudolphi, 

 has been broken up by Fischoeder, who substitutes his genus 

 Paramphistormim . The reason given is that Kudolpbi described an 

 Ampliistoraum viacroceplialum, which, however, according to the 

 laws of priority must be called Strujea. The oldest name for this 

 species is not Strigea, but Planaria teres, Goeze (1782) ; it was 

 afterwards termed Festucaria strigis, Schrank (1788), and subse- 

 quently (1793) Fasciola strigis, Gmelin ; then for the first time 

 Strigea, Abildgaard (1793), later AmpJiistoma macrocephalum, 

 Eudolphi (1801), and finally Ilolostornum variahile, Nitzsch (1819). 

 The latter is the name of the species to-day, and consequently it 

 is not an Ami)historaum ; the typical species of this genus are 

 coniciim, Kud., and suhti-iquetrum, End., but the name Faramphi- 

 stomum, which has not the slightest justification, has been adopted 

 by modern systematists. 



Trichina, Owen, is now called Trichinella, Railliet, since Meigen 

 applied the name Trichina to a Dipteron in 1830. Medicine, 

 veterinary science, and agriculture will not employ the terms 

 "Trichinellae," "examination for Trichinellse," and " Trichinellosis." 

 For more than thirty years the whole of the educated world has 

 known the meaning of Trichinae, but what Trichinellse are it does 

 not know and will, moreover, not learn ; there is no risk of con- 

 fusion ; when we read that someone is sufiPering from Trichinae or 

 that they have been found in a pig we do not think of flies ; I 

 consider it wrong to bring about a change of name that will never 

 be adopted. 



The genus Monostomum, Zeder, was abolished by the bestowal 

 upon its species of numerous other generic names ; afterwards, 



