466 
R. Scott. — - On Traquairia . 
The surface of the sphere is covered by a finer network than T. Carru- 
thersii and T. burntislandica. The inner capsule is preserved in some 
specimens, but none of those observed contain spores. 
Measurements : — 
Width of sphere without arms : 0*216 mm. -0-252 mm. 
Length of arm : 120 j u. 
Width of arm at base : 108 
The most characteristic feature in the organisms described is the very 
complicated structure of the outer envelope with its elaborate system of 
anastomosing tubes connected with prominent spines, which are themselves 
very complex organs. 
Nothing parallel to this is known in the vegetable world. 
The presence in well-preserved specimens of an inner capsule contain- 
ing spores, in the interior of which smaller spores are produced, reminds 
one of Radiolarians, though some previous authors have seen an analogy on 
this point with the massulae of Azolla. 
The spores, however, are not always confined to the inner capsule. 
The inner capsule and spores are features common to another fossil 
genus, Sporocarpon . In N. elegans there are spines also. But on the 
whole the outer envelope of Sporocarpon is less complicated, and often has 
a more cellular appearance than that of Traquairia. 
On the other hand, Sporocarpon elegans with its long spines is very 
much like a Radiolarian. The organisms of both genera urgently need 
further investigation. 
Professor Dendy, F.R.S., in a discussion at the Linnean Society, 
suggested that Traquairia might belong to an extinct group of Protozoa 
allied to the Radiolarians. 
My thanks are due to Dr. Smith-Woodward, F.R.S., Mr. Carruthers, 
F.R.S., Dr. Hinde, P'.R.S., and Professor Judd, F.R.S., for help in connexion 
with this paper. 
EXPLANATION OF FIGURES IN PLATES XXXIX AND XL. 
Illustrating Mrs. D. H. Scott’s paper on Traquairia. 
PLATE XXXIX. Drawings. 
Fig. 1. Traquairia burntislandica. Portion of the periphery showing hollow spines, x 280. 
Pettycur, Burntisland. S. 990. 
Fig. 2. T. burntislandica. Portion of the periphery showing hollow spines and tubular pores, 
x 280. Pettycur, Burntisland. S. 986. 
