﻿212 Canadian Record of Science. 



name Neasina Agassizi} It is of considerable size, the 

 largest specimens measuring 190 mm. in breadth, but is 

 very thin, being only 2 mm. in thickness. The general 

 form is fan-like or reniform, with concentric lines or 

 bands, from the edges of which loose tubes or hollow 

 bundles of fibres project into the water. These bands are 

 described as " chambers," which are, however, crossed by 

 inunnnerable thick partitions dividing them into cham- 

 berlets, and these partitions are composed of a tine 

 corneous stroma or network, in which and on the surface 

 are contained the arenaceous grains that give consistency 

 to the whole. It is evident that such a structure, if 

 fossilized, would resemble a flattened Cryptozoon in form, 

 appearance and structure, except in having rounded 

 chamberlets instead of short tortuous canals, a diflerence 

 not of essential importance. Goes mentions as probably 

 an allied form Jidianella foetidct, Schlumberger, from 

 shallow water (five metres) on the West Coast of Africa. 

 It wants the filamentous stroma and has the chamberlets 

 larger and more regular and the lateral tubes more 

 numerous. If these forms are rightly included in Forami- 

 nifera, they would strengthen the same reference for 

 Cryptozoon and Archccozoon. In an}^ case they indicate 

 the persistence up to the modern time of organisms 

 apparently of the same general structure. 



IV. GiRVANELLA, Xicliolson {Strei^tochctus, Seely). 



These peculiar fossils were first detected by Nicholson 

 and Etheridge in the Silurian of Girvan in Scotland,^ and 

 were illustrated by Mr. Wethered, of Cheltenham, at the 

 meeting of the British Association in Liverpool last 

 autumn.^ A similar form discovered in the Chazy of 

 Vermont by Prof. Seely, of Middlebury College, was 



1 Bill. Mils. Coiiiii. Zoology, Vol. XXIII., No. 5, 1892. 



2 Nicholson and I.ydeker, Pahtontoiogy, 1889, first dc 



rs. 



3 New Cotteswald Naturalists' Club, Vol. XII, Pt. 1, 1895-1). 



2 Nicholson and Lydeker, Pahtontoiogy, 1889, first described in Memoir on Girvai 

 1878. 



