176 MR. "W. "WEST OX THE FRESHWATER 



29. StaUBASTRUM maamense, Arch. (Cooke, Brit. Desm. 

 p. 155.) [S. pseudocrenatum, Lund, Desm. Suec. p. 65, tab. 4. 



fig. 4.] 



Long. 32-5-42-5 p ; lat. 28-37-5 n ; lat. isthm. 10-13-5 u. 



I. Ballynahinch ; Derryclare Lough. — II. Adrigole. 



tt30. S. trachyxotum, nov. sp. (S. saxonicum, ReinscJi, 1867.) 



- 



tfVar. annulatum, nov. var\ (PL XXIV. fig. 16.) 

 Yar. cum atmulo uno granulorum magnorum ad basin semi- 

 cellulae. 



I 



Long, cum spin. 43 /i ; lat. cum spin. 40 fx ; lat. sine spin. 35 \x ; 

 lat. isthm. 14 p, 



II. Carrantuohill. 



As the specific name saxonicum was applied to a Staurastrum 

 by Bulnheim in 1863, another name is needed for this species. 



t31. S. sUBSCABRrM, Nord. (Alg. Sandv. p. 16, tab. 2. fig. 1-) 



tt^orma scabrior. (PI. XXIII. fig. 4.) 

 Forma membrana asperiore, prsesertim ad apices. 

 Long. 40 /x ; lat. 35-37 fi ; v lat. isthm. 10 /x. 

 I. Kylemore ; Clifden. 



tt32. S. TEACHTGoyuM:, nov. sp. (PL XXIII. fig. 5.) 



S. parvum, paulo longius quam latius, modice constrictum, 

 sinu subaperto ; semicellula3 subellipticae apice truncate, spims 



( 



a 



vertice visas triangulatse, lateribus subconcavis, angulisrotundatis 

 cum annulo spinarum brevium circa centrum glabrum. 

 Long. 325 /i ; lat. 28 fx ; lat. isthm. 7*5 /*. 



I. Kylemore. 



33. S. mtjticum, Breb. (Ralfs, Brit. Desm. p. 125, tab. 21. 

 fig. 4, tab. 34. fig. 13.) 



II. Lough Gruitane ; Adrigole. 



34. S. orbictjlaee, Balfs. (Brit. Desm. p. 125, tab. 21. 

 fig. 5.) 



Loug. 37-41 fi ; lat. 28-37 ;u ; lat. istbm. 7*5-11 /". 



I. Creggan Lough ; Ballynahinch ; Derryclare Lough ; Lough 

 Sbindilla ; Nacoogarrow Lough ; Letereen Lough. — IL Lough 

 Guitane; Lower Lake of Killarney ; Glen Caragh ; Carrantuo- 

 hill ; Adrigole ; Castletown. - 



