Bacteriologie. — Lichenes. 229 



of the Colon bacilli which survived 62.8° C. When the 12 cultures 

 which survived, were heated again at the same temperature, it 

 was found, that many did not survive and in each repeated heating 

 different results were obtained. It seems evident that 62.8° C. main- 

 tained for 30 minutes is a critical temperature for colon bacilli. 



Among the 174 cultures studied all were found to have a low 

 majority thermal death point, but were able to survive pasteurizing 

 temperatures on account of the survival of a few cells. 



The colon test as an index of the efficiency of the process of 

 pasteurization is complicated by the ability of certain strains to 

 survive a temperature of 62.8° C. for 30 minutes and to develop 

 rapidly when the pasteurized milk is held under temperature con- 

 ditions which might be met during storage and delivery. The pre- 

 sence of a large number of colon bacilli immediately after the 

 heating process may indicate improper treatment of the milk. 



If milk is pasteurized at a temperature of 65.6° C. or above for 

 30 minutes we should not expect, from these results, that anj^ colon 

 bacilli would survive. Consequently under such conditions the colon 

 test for the efficiency of pasteurization may be of value. It must be 

 remembered, however, that a study of more cultures may reveal 

 strains of colon bacilli that are able to survive this and even higher 

 temperatures. M. J. Si'rks (Haarlem). 



Hue, A., Lichenes novos vel melius cognitosexposuit. 

 (Annal. Mycolog. XII. p. 509—534. 1914 et XIII. p. 73—103. 1915.) 



Verf. beschreibt die folgenden Flechten ausführlich in lateini- 

 scher Sprache: 



Nylanderiella Hue nov. gen. (in die Familie der Pyrenothamna- 

 ceae gehörig), mit N. medioxima (Nyl.) Ramalina ryosolea (Ach.) 

 Hue, Cetraria aculeata f. acanthella Nyl., C. gracüenta Wain , C. tris- 

 tis Schaer., Endocena informis Cromb., Anaptychia scorigena (Moni.) 

 Hue, Lecanora (s. Caloplaca) melanhaematica Hue; L. (s. Caloplaca) 

 xanthopa Hue, L. (s. Parmularia) perconcinna Hue, L. (s. Parmula- 

 ria) divides Hue, L. s. (Parmularia) orientalis Hue, L. (s. Parmula- 

 ria) leptopismodes Nyl., L. (s. Placopsis) stenophylla Hue, L. (s. Pla- 

 copsis) cribellans Nyl., L. (s. Eulecanora) verruciformis Hue, L. (s. 

 Orcholechia) jucunda (Fw.) Hue, L. parallale Müll. Arg. va\\. i. atrata 

 Hue, Aspicilia (s. Euaspicilia) atroviolacea (Fw.) Hue, A. (s. Elaste- 

 naspicilia) Claudeliana Harm., Palyblastiopsis haematochroa Hue, 

 Asteristion erumpens Leight., Solorinella asteriscus Anzi, Theloschis- 

 tes tetrasporellus (Nyl.) Hue, Lecanora (s. Placodium) vulnerata Hue, 

 L. (s. Placodium) tenuissima Hue, L. (s. Placodium) microphylla 

 Hue, L. (s. Placodium) aequata Hue, L. (s. Placodium) Kobeana Hue, 

 L. (s. Caloplaca) Fosanii Hue, L. (s. Caloplaca) diffluens Hue, L. (s. 

 Caloplaca) micromera Hue, L. (s. Caloplaca rubeola Hue, L. (s. Calo- 

 placa) dolomiticola Hue, L. (s. Caloplaca aggesta Hue, L. (s. Calo- 

 placa) subaurantiaca Fee, L. (s. Caloplaca) verrucata Hue, L. (s. 

 Eulecanora pachycheila Hue, L. (s. Eulecanora) megalospora Hue, 

 L. (s. Eulecanora) chionocarpa Hue, L. (s. Eulecanora) xylophila Hue, 

 L. s. {Eulecanora) subrubra Hue mit f. borea Hue, var. microcheila 

 Hue, var. megalocheila Hue und var. sulcata Hue, L. (s. Eulecanora) 

 pachysperma Hue, L. verruculigera Hue, L. (s. Eulecanora) hemi- 

 phracta Hue, L. (s. Eulecanora) verrucifera Hue, Lecidea (s. Blaste- 

 nia) Demangei Harm., Aspicilia (s. Euaspicilia) marmoricola Hue und 

 A. {Blasteniaspicilia) cineroUsacea Harm. Zahlbruckner (Wien). 



