48 MESSES. W. WEST AjN'D G. S. WEST ON 



35. Cylikdeoctstis ckassa, De Bary, Conj. p. 74; Cooke, Brit. Desm. p. 46, pi. 18, 

 fig. 2. 



Var. ELUPTicuM, nov. var. (PL A\ fig. 27.) Var. latior, lateribus valde convexis. 

 Long. 35 fA ; lat. 29 //.. 

 No. 0. 



Genus Miceasteeias, Ag. 



36. MiCEASTEEiAS PiNNATiFiDA, Balfs, Brit. Desm. j). 77, tab. x. fig. 3. {Euastrum imina- 

 tifidtmi, Kiitz. Phycolog. Germ. p. 134.) 



^ar. INCUDIFOEMIS, nov. var. (PL VI. fig. 5.) 



Var. tarn longa quam lata ; lobo polari in parte inferiore cylindrico, partis superioris 

 lobulis attenuatis unidentatisquc ; membranii dense punctata. 



l-ong. 62-63-5 /x; lat. 63 f^; lat. isthm. 11'5 ^. 



Ko. 1. 



37. MicEASTEEiAS Ceux-Melitensis, Ealfs, Brit. Desm. p. 73, tab. ix. fig. 3. {Euastrum 

 Cruw'Melitensis, Ehrenb. in Abliandl. Berl. Akad. p. 81, ex p. Kiitz. Phycolog. Germ, 

 p. 134.) 



Var. EVOLUTA, W. B. Turn. Presliw. Alg. of E. India, p. 92. 

 I^ong. 94 ^ ; lat. 84 ju ; long. dent. apic. 3 ^. (PL VI. fig. 1.) 

 No. 1. 



38. MiCEASTEEiAS MAHABXJLESiiWAEEi^sis, Hobson, Notes on Indian Desm. in Quart. 

 Journ. Micr. Sc. 1863, p. 168 ; Lundell, Desm. Suec. p. 15, tab. i. fig. 6. 



Var. TETEACEEUM, nov. var. (PL VI. figs. 2-4.) Yar. lobulis brevioribus et crassioribus, 

 denticulis minoribus et paucioribus, apicibus truneatis tridenticulatis ; lobo polari 

 a processibus duobus liorizontalibus Qi xwocessihns qiiahio^^ ad apicem ornatis • tumore 

 centrali a seriebus granulorum non semper intra marginem sed seriatim tumore 

 centrali tenus granulato. 



Long, sine proc. 131-138 fx ; lat. 106-119 ^u; lat. istlim. 25-30 «. 



No. 0. 



Tbis belongs to tbe "£. compacta'' section of Nordst. (Eresliwater Algijc of New 

 Zealand and Australia, p. 31), but the doubling of the two smaller apical processes 

 distmguishes it from all other varieties of the species. Pig. 4 shows an abnormally 

 developed semicell. 



