130 
FERNS : BRITISH AND FOREIGN. 
elongated, immersed, rarely superficial, forming linear, con- 
tinuous or interrupted reticulated sori. 
Genus 55. — Outline portion of fertile frond, under side. No. 4. 
1. A. lineatum, Kaulf. Polytsenium lineatum, Dcsv. ; J. Sm. 
Gen. Fil. ; Hook. Gen. Fil. t. 107. Vittaria lanceolata, 
Sw.; Schk. Fil. t. 101 B.— West Indies. 
2. A. laneeolatum, Kaulf. Hemionitis lanceolata, Linn. ; 
(Plum. Fil. 1. 127,/. c) ; Schk. Fil. t. 6. — West Indies. 
3. A. Cayennense, Kaulf. ; Kunze, Anal. t. 19, /. 2. He- 
mionitis Cayennensis, Dcsv. ; Presl. — Tropical 
America. 
4. A. retieulatum, Kaulf. Hemionitis reticulata, Forst. 
Schk. Fil. t. 6. — Indian, Malayan, and Pacific Islands. 
§ 4. Vittarice. Fronds simple, linear. Sori transverse, 
continuous, marginal or anti-marginal. 
56. VITTARIA, Sm. 
Vernation uniserial, contiguous ; sarmentum short, furnisheu 
