150 MR. W. WEST (XST THE FRESHWATER 



Long. 14-17 fx ; lat. 14-16 \i ; lat. isthm. 5 fi. 



I. Lough Shannacloontippen ; near Recess ; Bally nahinch ; 

 Moher Lough ; near Oughterard ; near Westport ; Lakes, Clif- 

 den to Roundstone : Creggan Lough ; Derryclare Lough ; Lakes 

 east of Lough Bofin ; Nabincka and Nacoogarrow (Loughs ; 

 Roundstone ; Boy Lough ; Letereen Lough ; Baheh Loughs ; 

 Glendalough ; Lough Shindilla. — II. Lough Gruitane ; Upper 

 and Lower Lakes of Killarney ; Kenmare ; Adrigole ; Cloonee 

 Lough. 



ft43. COSMARIUM SUBDAXICUM, 110V. sp. (PI. XXL fig. 4.) 



C. parvum, circiter tarn longum quam latum, ineisura median a 

 prof unda lineari (extremo ampliata); semicellulse subtrapezicae, 

 lateribus subconvexis binis papillis brevissimis emarginatis in- 

 structs, in apice truncato quinque crenis levissimis praeditse; a 

 vertice visse elliptic*©, medio leviter subtumidse; a latere visae sub- 

 eirculares; meinbrana Levis ; pyrenoidibus singulis. 



Long. 17'5/i; lat. ad bas. semicell. 14 /j ; lat. ad apic. 11/* J 

 lat. isthm. 4 ^ ; crass. 8*5 /j. 



I. Ballvnahinch. 



This is similar to C. danicum, Boerg. (Bidrag til Bornholms 

 Desmidie-Plora, p. 145, tab. 6. fig. 6), but the sides differ in not 

 having such a large subapical notch as well as in the lack ot 

 granules. It is also similar to O. bipunctatum, Boerg. (Desm. 

 Brasil. p. 945, tab. 4. fig. 88), in outline, but differs in its margin, 

 its smooth membrane, and in its faint monosubpapillate central 

 protuberance. 



44. C. qrena-TUM, Balfs. {Brit. Desm. p. 96, tab. 15. fig- 7.) 



I. Oorid Lough. — II. Lough Guitane ; Carrantuohill ; Grlen 

 Caragh ; Castletown ; near Lough Brin ; Cloonee Lough ; 8 m. 

 S. of Kenmare. 



• • • 



45. C. subcrenatuh, Hantzsch. (Babh. FL Europ. Alg. u*« 

 p. 164; Nord. Desm. Arct. p. 21, tab. 6. figs. 10, 11.) 



Long. 33 p ; lat. 30 fi ; lat. isthm. 11 /i. 



II. Muckross; Carrantuohill; Cloonee Lough. 



f Var. divakicatxjm, Witte. (Ferskv. Alg. frati Nov. Semi. 

 p. 40, tab. 12. fig. 27.) 

 Forma crenis lateralibus sub-bidentulatis, et grauulae sermcel- 

 lularum in series 3 verticales dispositse. 

 L Creggan Lough. 



