TETMEMOR11S. 221 



Abnormalities of tin's Desinid are sometimes met with, one 

 of the most curious and interesting being ;i form in which 

 one semicell is bifurcated at the apex. I'lilr J;icols. Dcsm. 

 Danem. 1875, t. 8, f. 31; West and (J. S. \Vest, Obs. on 

 Conj. 1898, t. 4, f. 40. Another ahnornial cell has liccn 

 observed which consisted of three " seinicolls " ; West, Al<_r. 

 X. Yorks. 1889, t, 291, f. 5. 



Forma minor Nordst. 



Tetmemorus ijranulatus forma minor Novilst. Ato-. aq. dulr. ct Char. 

 Sandvic. 1878, p. 10; West, Al\ W. Ireland, 1S<)2, p. 132; West \ 

 (}. S. West, Alo-a-fi. Yorks. 1900, p. <iO; Al-. N. Ireland, Uo2. p. 27. 



Cells considerably smaller than the average size. 



Length 95-117 ^; breadth 21-28 p.. 



ENGLAND. Near Settle, Great Sleddale, and bog 

 near Widdalc Beck, Yorks ! 



SCOTLAND. Near Scourie, Sutherland ! 



IRELAND. Near (Plenties, Donegal ! Ballynahinch, 

 Galway ! 



Gei'Hji'. Distribution. New Zealand. Sandwich 

 Islands. 



Var. attenuatus AVest, (PI. XXXII, fig. 10.) 



Tetmemorus granulatus var. attenuatus West, Alg. W. Ireland, 1892, p. 132, 

 t. 20, f. 7 ; West & G. S. West, Some N. Amer. Dcsm. 189(5, p. 238 ; Alg. 

 N. Ireland, 1902, p. 27. 



Semicells rather suddenly but slightly attenuated 

 jnst below the apices. 



Length 170-182 ^; greatest breadth 30 ^ ; breadth 

 of isthmus 22-25 /A ; breadth of apex 15-17 ft ; breadth 

 below apex 15 /x. 



ENGLAND. Blea Tarn and Stickle Tarn, Westmore- 

 land ! Hawkshead, Lancashire ! 



WALES. Bog below Llyn Idwal, Carnarvonshire ! 



SCOTLAND. Loch Lnichart, Ross ! Loch Macaterick, 

 Ayr ! Hoy and Kirkwall, Orkneys ! Scalloway and 

 Lerwick, Shetlands ! 



IRELAND. Donegal ! Galway ! Kerry ! 



Geogr. Distribution. United States. 



We have examined American specimens of this variety up 

 to :' ()-'"5 // in length . 



