BY G. 1. PLAYFAIR. 169 



Omnia speciinina apices versus magis atteiiuata quaiii forma a 

 cl. Raciborski delineata. Endochroma totae cellulae (ut primo 

 videtur) in lamina quatbuor lateralia dispositaarea vacua centrali 

 in forma crucis reliquente, vero tamen endochroma in taenias 6-8 

 angustissimas longitudinales ex axi centrali radiantes, ordinata 

 est. Nuclei amylacei singuli magni. 



Genus T e t m e m o R u s Ralfs. 

 Tet. immanis, n.sp. (T.iii. f.5). 



Tet. permagnus, 6-8 plo. longior quam latus, a fronte visus 

 oblongus, in medio constricbus, lateribus fere parallelis, apices 

 versus pauUo atbenuatus, apicibus robundato-bruncatis, incisura 

 profunda lineari exbremo ampliato; a latere visus lateribus 

 parallelis sed pauUo rebusis, apices versus rapide abtenuatus, 

 apicibus obbuso-robuudabis. Membranaachroa puncbaba, punctis 

 in lineis longitudinalibus dispositis. 



Long. 364-425; lab. 50-58 /x. 



Botany. 



lb oubline somewhab like T. Brebissonii, bub far exceeding it in 

 size. Of. also I'et. pe?iioides Benn., in Cooke, Br. Desm. T.26, f.2. 



Tet. gracilis, n.sp. (T.iii. f.4). 



Teb. parvus, 6-plo. longior quam labus, medio sinu acubo levi 

 vix consbricbus, a fronbe visus laberibus fere jiarallelis, ad apices 

 versus aegie abbenuabus, apicibus rotundatis, incisura lineari 

 exbremo ampliabo; a labere visus laberibus parallelis, apicibus 

 robundatis. Membrana achroa puncbaba, punctis obscuris in 

 lineis longibudinalibus disposibis. 



Long. 102; lab. 18/x, 



Coogee. 



This form may perhaps be placed near Tet. laevis, from which 

 it differs in its evenly cylindrical shape. Fronb and side views 

 are both like the fig. of Tet. Brebissonii in Wolle, T.20, f. L 



