104 



Hab, — Fresh water, Clifton, New Dorp, New Brighton, Gar- 

 retsons. Very frequent but not abundant. (Plate XC. fig. 6.) 



Stauroneis gracilis, Ehr. 



Siatiyoiieis gracilis^ Wm. Sm.,Syn. B. D. p. 59, pi. XIX. fig. iS6; Kiitz. 

 Bacill. p. 104, t. XXIX. fig. 3; Rabenh. Sussw. Diat. p. 48, t. IX. fig. 3; Ralfs. 

 in Frit. Inf. p. 913; Brun, Diat. of the Alps and Jura, p. 89, pi. IX. fig. 6. 



Valve lanceolate with obtuse apices ; stauros linear, not reach- 

 ing the margin ; striae delicate, punctate, convergent. 



Hab. — Fresh water, scarce. Clifton, New Dorp. (Plate XC. 

 fig. 10.) 



Brun erroneously attributes 5. gracilis to W. Sm. 



Stauroneis anceps, Ehr. 



Stattroneis anceps^ Kiitz, Bacill. p. 105, t. XXIX. fig. 4; Wm. Sm. Syn. Vol. 

 I. p. 60, pi, XIX. fig. 190 ; Van Heiirck, Syn. p. 68, pi. IV. figs. 4-5; Rabenh, 

 Siissw. Diat. p. 48, pi. IX. fig. 14;, Ralfs in Prit, Inf. p. 912; Brun, Diat, of the 



Alps and Jura, p. 89, pi. IX. tigs. 1-2. 



Valve lanceolate, constricted at extremities into rounded api- 

 ces; stauros reaching the margin ; stride fine, convergent. 



Hab, — Fresh water, not frequent. CUfton. (Plate XC. fig. 12.) 



Some New North American Lichens. 



By John W. Eckfeldt, M.D. 



During the year 1887 I had submitted to me for study a 

 collection of Lichens made in Florida by Mr. .W. W. Calkins, who 

 was spending the winter at Jacksonville, and among the number 

 of two hundred species there were several unknown at that time 

 to me. With the kind assistance of Dr. Nylander, of Paris, who 

 has named these plants, I am enabled to bring them before the 

 attention of our Lichenists. One species herein enumerated is 

 from the Pacific coast : 



Lecidea (Biatora) Floridensis, NyL spec. nov. 



Thalluscinerascensvelcinereo-fuscescens, tenuis, opacus, con- 

 tinuus; apothecia nigra, plana, marginata (latit I mm. vel min- 

 ora), intus obscura; sporse 8 nae, incolores, ellipsoide^, simplices, 

 longit 0,011-15, crassit 0,006-8 mm, paraphyses non bene dis- 

 tinctae, epithecium et hypotheclum fuscse. lodo getatina hyme- 

 nialis fulvo rubesccns (pr.nccedente ceerulescentia livi). Species 

 videtur ex affinitata L crnstulaicv, Ach., sed spcrmogonia non visa. 



A rather rare and fine «;noripc; nmirr;nrr;« 4-k^ *^^;«.uu^*-^r^nd 



