620 



SCIENCE 



[N. S. Vol. XXXIX. No. 1008 



(3, 4) Salpa Forskal, 1775, und Cyclosalpa 

 Blainville, 1827. — Diese beiden Genera sind 

 durch Ihle, 1911 (Zool. Anz., v. 38, pp. 585- 

 589) verteidigt und auch in seine Bearbeitung 

 in "Das Tierreicli" (v. 37, 1912; Siehe auch 

 Nota p. 27, von F. E. Schulze) iibergegangen. 

 Wir glauben uns mit diesem Hinweise^ beg- 

 niigen zu konnen und erlauben uns noch an 

 die gegenteiligen Aufsatze^ von Poche (Zool. 

 Anz., V. 32, 1907, pp. 106-109; v. 39, 1912, 

 pp. 410-413) zu erinnern. 



(5) Appendicularia Fol, 1874. — Appendicul- 

 aria wurde von Chamisso & Eisenhardt, 1820 

 (N. Acta Ac. Leop., v. 10 (11), p. 362, t. 34 

 f. 4), fiir eine arctische, nicht erkennbare Art, 

 aufgestellt. Fol bat 1874 (Arcb. Zool. exper., 

 V. 3, notes, p. 49) den Gattungsnamen fiir die 

 tropische Art Appendicularia sicula, die von 

 der arctischen sicher generiscb verscbieden ist, 

 iibernommen und darauf bin hat sicli der 

 Name in letzterem Sinne allgemein einge- 

 biirgert. Appendicularia wiirde anderenfalls 

 eine Species incerta entbalten und fiir Appen- 

 dicularia mit der Species sicula wiirde ein 

 neuer Gattungsnamen aufzustellen sein. Der 

 Name der Ordnung Appendicularidag wiirde 

 verscbwinden. 



(6) Fritillaria Fol, 1874.— Quoy & Gaimard, 

 1834 (Voy. Astrolabe, v. 4, p. 306) stellen den 

 Namen Fretillaires auf [(Fritillaria Huxley 

 (1851, Pbilos. Trans. (London), part 2, p. 

 595), Fritillaire C. Vogt, 1854 (Mem. Inst. 

 Geneve, v. 2, no. 2, p. 74)], identificierten ibn 

 aber sofort mit Oihopleura Mertens, 1831. 

 Um den Namen PrUillaria zu retten, bat Fol, 

 1874 (Arch, exper., v. 3, notes, p. 49) ihn in 

 bestimmten von f riiberem abweicbendem Sinne 

 gebraucht, in welchem eK sich vollstandig 

 eingebiirgert hat. Fritillaria wiirde Synonym 

 zu Oilcopleura und eine Neubennung notig. 



1 The secretary spends an average of about six 

 (6) hours per week in studies and correspondence 

 for the Commission on Nomenclature, and he 

 earnestly requests all persons to give full details 

 with full references to every case submitted. Even 

 slight omissions cause a loss of time. The secre- 

 tary also respectfully requests that authors sub- 

 mit their cases in typewriting, rather than in 

 handwriting. — C. "W. S. 



C. Apstein (Berlin), A. Borgert (Bonn), 

 G. P. Farran (Dublin), G. H. Fowler (Aspley- 

 Guise), R. Hartmeyer (Berlin), W. A. Herd- 

 man (Liverpool), J. E. W. Ihle (Utrecht), 

 H. Lohmann (Hamburg), W. Miehaelsen 

 (Hamburg), G. Neumann (Dresden), C. Ph. 

 Sluiter (Amsterdam), F. Todaro (Eome). 



C. W. Stiles, 

 Secretary of Commission 



SPECIAL AMTICLES 



A RUST — NEW ON APPLES, PEARS AND OTHER 

 POME FRUITS ^ 



For several years the writer has been study- 

 ing an interesting rust on several cultivated 

 and native species of the pome family. In 

 1908, the fecial stage of this rust was found on 

 the servieeberry (Amelanchier florida Lindl.) 

 and on the thornapple or haw {Crataegus 

 douglasii Lindl.) ; latet, the same rust 

 was found on apples, pears, quinces and related 

 fruits, as noted below. The rust on Ame- 

 lanchier florida and Crataegus douglasii has 

 been referred to ^cidium Masdaleanum, 

 D. & H., the telial stage, Gymnosporangium 

 Masdaleanum (D. & H.) Kern., occurring on 

 the incense cedar (Lihocedrus decurrens Tor.). 



During the past six years the writer has 

 paid particular attention to this rust for the 

 reason that it seems to be of considerable 

 economic importance. While it occurs rather 

 sparingly on practically all varieties of apples 

 so far observed, it has been found to attack 

 certain varieties of pears very seriously. 

 Quinces are also subject to considerable injury 

 by this rust. In 1910, and again in 1912, this 

 rust was so serious in a block of Winter Nelis 

 pears as to practically destroy 95 per cent, of 

 the crop. The fruit was badly deformed and 

 fully 50 per cent, of the leaves were found 

 infected. The fruit and stems in many cases 

 were completely covered with seeia, distortion 

 and dropping of the fruit being the result. 

 All varieties of pears are not equally suscep- 

 tible, but both European and Oriental vari- 

 eties were found affected. Oriental hybrids 



1 A preliminary paper. 



