THE FRESHAVATER ALG.^ Or MADAGAtSCAJi. 7^ 



It differs from S. mcMei, Halfs, var. gramilatum, Hoy et Biss. (Jap. Dcsniid in 

 Journ. Bot., July 1886, p. 238), in being much smaller, in its more narrowly 

 elliptical semicells, its longer and straigliter spines, and m the coarser and more 

 distant granules. 



126. Staurastrum PSEIJDOCIJSPIDATUM, Koy et Biss. Jap. Desm. in Journ. Bot. 1880 

 p. 237, tab. 268. fig. 3. 



Long. 21-22 fx ; lat. sine spin. 15-17 /i, cum spin. 27-28 /u ; lat. isthm. 5-5-r) « 

 (PL VIII. fig. 44) 

 Nos. 1 and 3. 



127. Staitrastrum MONTicuLOSUM, Breb. in Menegh. Syn. Desm. p. 220 ; Ralfs, Brit. 

 Desmid. p. 130, t. xxxiv. lig. 9. 



Var. BiFARiuM, Nordst. Bidrag till kiinn. sydlig. Xorges Desm. p. 31, fig. 14. Forma 

 minor. (PL VIII. fig. 21.) 

 Long, sine proc. 19 n, cum proc. 27 /t ; lat. c. acul. 23 /x ; lat. isthm. 7*5 ^. 

 No. 1. 



128. Staurastrum fissijm, W. B. Turn. Preshw. Alg. of E. India, p. 110, tab. xiv. fig. 24. 



Var. PERTissuM, nov. var. (PL VIII. figs. 22, 23.) Var. paullo raajus, processibus longi- 

 oribus apicibus bidenticulatis ; a vertice V]sa3 lateribus concavis. 

 Long. 19-23 /x ; lat. c. proc. 28-32"5 fi ; lat. isthm. 6-7 "6 a*. , ' 

 No. 3. 



129. STArRASTRUM ORNiTHOCEPHALiJM, nov. sp. (PL VIII. fig. 24.) S. parvum, paullo 

 latins quam longum (cum processibus), modice constrictum ; semicellulx' late 

 campanulatae, apicibus convexis cum verrucis duabus emarginatis intra marginera, 

 angulis in processus breves productis, cum crena singula utrobique infra apices, 

 capitatis apiculatis ; a vertice visas triangulares lateribus subconvexis, angulis pro- 

 ductis capitatis apiculatis cum crena utrobique in l)asi, cum verrucis duabus 

 emarginatis intra latus utrumque ; membrana glabra. 



Long. 23 fx ; lat. 26 ^u ; lat. isthm. 5-7 /«. 



No. 0. 



This Staurastrum seems to be unique ; the two emarginate warts just witliin tlie 

 margins of the vertical view can only be seen projecting when it is in an inclined 

 position. 



130. Staurastrum orbiculare, Ealfs, Brit. Desm. p. 125, tab. xxi. fig. 5. 



Var. DEPRESSUM, Boy et Biss. Jap. Desm. in Journ. Bot. 1886, p. 237, tab. 208. fig. 14. 

 Long. 19 fx ; lat. 19 /n ; lat. isthm. 7 n- 

 No. 0. 



SECOND SERIES. — BOTANY, VOL. V. ^ 



