MICROSCOPIC LIFE OF ST. KILDA 



95 



having a raw appearance, due no doubt to its being con- 

 tinually cut for fuel. In a little trickle of water issuing from 

 a small corrie above the village, and known, I believe, as the 

 " Glen," I found several species of aquatic and semi-aquatic 

 mosses growing on the stones. These were Fontinalis 

 antipyretica, RJiacomitriuin aciculare, Grimm ia apocarpa. 



A small box was filled with these, and they were 

 examined later on the same day, on our return to Loch- 

 maddy. Twenty species of organisms were observed, includ- 

 ing Rotifers, Tardigrades, Rhizopods,Nematodes, Peridiniaceae, 

 and Desmids, 



LIST OF SPECIES. 



Philodina flaviceps (Bryce, M.S.). 



Abundant. 



P. acuficornis, Murray. Few. 

 P. macrostyla, Ehr. Several. 

 P. n/gosa, Bryce. One. 

 P. brevipes, Murray. One, very 



large. 

 Callidina plicata, Bryce. Few, 



typical. 

 C. angiisticollis, Murray. One 



empty case. 

 C. sp. ? Several. 

 Annraa cochlearis, Gosse. 



Polyarthra platyptera, Ehr. 

 Diaschiza ladnulata (O. F. 



Miiller). 



Metopidia acuminata, Ehr. 

 Mono sty la sp. ? 



Macrobiotus hufelandi, C. Sch. 

 Echiniscus arctomys, Ehr., 



variety. 



Euglypha ciliata, Leidy. 

 Thread-worm sp. 

 Penium sp. 

 Closterium sp. 

 Peridinium tabulation, Ehr. 



REMARKS. 



Philodina flaviceps was the only abundant species. It is 

 very common at the margins of lakes, all over the Highlands, 

 where it also occurs in streams and rarely in bogs ; it has not 

 yet been found outside of Scotland. 



Callidina sp. This was one of the pellet-making Callidin<z, 

 with a very long neck and a loop formed by the gullet. It 

 is well known and widely distributed on the mainland, and 

 has been thought to be C. leitgebii, Zelinka, a species about 

 which there is much doubt. 



It was interesting to note the existence of two thoroughly 

 pelagic species of Rotifers, Anurcea cochlcaris and Polyarthra 

 platyptera, which are abundant in nearly every lake in the 

 country, although the largest bodies of water they could find 



