Mr. W. Clark on the recent Forarninifera. 167 



nute polypiferous constructors, which may be either compound 

 or single animals. Cabinet specimens are almost always polished 

 by attrition. 



This statement is, I believe, the true solution of the condi- 

 tions of the only two Forarninifera about which doubts can 

 exist as to the animal ; all the rest, without exception, follow 

 the type of the animals I have described above as to gene- 

 ralities. I may add, that I have examined with the highest 

 powers many of the Nodosaria striata, and have not detected a 

 membranous animal lining, which better observers say they have 

 seen. When there is a minute perforation at the side of the 

 neck of the bulb, occasioned by a boring animal, in such, the 

 chambers sometimes contain the remains of parasites and fine 

 mud and sand that cause discoloration of the globules, which 

 authors may have mistaken for parenchymatous matter. It is 

 also possible that very minute parasites may enter at the stran- 

 gulated necks when the stem is broken up, and locate themselves 

 within, in like manner as in the Miliolidce, which, I have stated 

 above, are constantly inhabited by parasites of various species. 

 Whatever doubt may exist as to the animals of Nodosaria Icevis 

 and N. striata, I think there can be none of the N. striata having 

 its unilocular globules piled one on the other. In this opinion 

 I am strongly supported by an article in the February Number 

 of the { Annals' for 1849 by Mr. M'Coy, who thus observes on 

 his Nodosaria fusulinaformis : — 



" Shell of two or more inflated, pyriform, easily separable 

 lodges, the first one having a small mucronate point at its 

 posterior end, and contracted to a very slender, short neck at 

 the anterior end which joins the pyriform second cell, which is 

 also contracted to a similar minute neck in front; surface 

 smooth." 



Mr. M'Coy also observes, " that the lodges or cells are almost 

 always found separated (from the minuteness of the connecting 

 neck)." Mr. M'Coy also says, " I have however heard of several 

 of them being found united in a line by their little necks, and 

 the posterior cell not being a terminal one." 



This is substantially my account of Lagena lavis in my first 

 paper, and I can truly say, that Mr. M'Coy's article never came 

 to my knowledge until long after it and the present notes were 

 written. I have scarcely a doubt from the extracts, that these 

 organisms are of a nearly, if not absolutely identical structure 

 with Montagu's Vermiculum lave, our Nodosaria, and the Lagena 

 lavis of authors ; they have the same slender strangulations of 

 the nodulous Lagena, the fragments of which have so long been 

 mistaken for distinct objects. The typical Nodosaria have nothing* 

 like the aspect of the very recent lageniform species, first, I 



