DESCBIPTION OF ENOEA.VINGS. 



G95 



PLATE XV {continued.) 



Figs. 60 and 61. Ceratoneis Fasciola (Ehr.) 



62 and 63. Dictyocha Speculum (Ehr.)— Fig. 62, viewed in front ; fig. 63, 

 viewed siddvays. 



64. DifHugia acanthophora (Ehr.) — Its surface illustrates what is 'termed an 

 imbricate disposition of the scale-like markings. A navicular body is 

 represented in its interior, as seen tlirou<?h its ti'ansparent lorica. 



65 and 66. Asplanehna Brightwellii (Brightwell.) — These two figures are from 

 Mr. Brightwell's Book; fig. 65, is there described as "a young 

 specimen (female), just emerged, in which the red eye and germs of 

 other organs are seen ;" in fig. 66, " may be seen the oesophagus leading 

 to the stomach, and above tlie stomach two small bodies, (cither salivary 

 or hepatic glands), and under it the opaque ovisac." 



67, 68 and 69. Zoothamnium arbuscula (Brightwell.) — These three figures 

 from Mr. Brightwell, illusti'ate the curious cycle in development, referred 

 to in tlie text, 



70. Vaginicola. . ? (Brightwell.)— Apparently a Vaginicola undergoing spon- 



taneous fission. 



71. Mesocena heptagona (Ehr.) 



72. Stauroptera Cardinalis (Ehr.) — A latei'al view. 



73. Stauroptera isostauron (Ehr.) — Dorsal or ventral aspect. 



PLATE XVI.— (The figures are after Kiitzing.) 



Fiars. 



Rhiphidophora nubecula 

 Epithemia Musculus 

 Rhiphidophoi'aMeneghiniana 

 Licmophora fulgens 

 Meridion Znickeni 

 Grammatophora hannulifera 

 Grammitophora constrictum 

 Odontidiura me.sodon 

 Odontidium turgidulum 

 Tabellaria ventricosa 

 Rhabdonema Adriaticura 

 Pododiscus Jamaicensis 

 Tabellaria flocculosa 

 30, 31, 32 and 32 a. Odontella ob- 

 tusa 

 Pyxidicula adriatica 



PLATE XVII— (The Figures are after Kiitzing.) 



Figs, 1 to 12 inclusive. Fragillaria 

 Capucina 

 13. Himantidium Soleirolii 

 1-1. Cymbosira Agardhii 

 I.5. Achnauthidium microccphalum 



Figs. 16. Achnanthidium delicatulum 

 17. Cyclotella Scotica 

 18, 19 and 20. Cymbella gustroides 



21. Doi-yphora Amjihiceros 



22. Encyoncma prostratum 



