2i2 The Irish Nattiralisi. Septeiiibef, 



as the test of this species is subarenaceous, the spiral arrange- 

 ment of the early chambers, which constitutes the difference 

 between Spiroplecta and Tcxtidaria, is not easily seen. This 

 is especiall}^ the case with the pointed forms, in which the 

 early spiral chambers are always extremel}^ minute. I have 

 since examined with transmitted light specimens mounted in 

 Canada balsam, and by this means I have been enabled to see 

 most distinctly the arrangement of the chambers throughout 

 the entire test. I have examined in this way about 150 from 

 dredgings taken off the Irish coast, including these Rathlin 

 specimens, with a large number of fossil specimens from the 

 Chalk of Co. Antrim ; also the only perfect specimen which I 

 had of the variety fisttdosa, Brady, from Raine Island, Torres 

 Straits, 155 fathoms. In all cases both the recent and fossil 

 specimens when perfect had the early chambers arranged in a 

 spiral manner. Further research since 1888 has therefore 

 confirmed me in my belief that this species is truly a Spiro- 

 plecta and not a Textidaria. 



To my friend, Robert Welch, I am greatly indebted for the 

 very accurate drawings of the Foraminifera which accompany 

 this communication. 



The following species were from dredgings taken in Church 

 Bay in from 17 to 22 fathoms: — 



lyisT OF Species. 



Blloculina irreg^ularis, d'Orb.— Very rare. 



B. ringens, var. elong^ata, d'Orb. — Rare. 



B. depressa, d'Orb. -Frequent. 



Spiroloculina excavata, d'Orb.— Frequent. 



S. canaliculata, d'Orb. — Rare. 



IVIilioIina seminulum (Linn.).— Common. 



IVI. oblongra (Montag.). — Verj- rare. 



IVI. trigonula (Lamk.). — Rare. 



WI. secans (d'Orb.). — Rare. 



lYl. subrotunda (Montag.).— Rare. 



IVI, bicornis (W. & J.).— Frequent. 



IVI. Ferussacii (d'Orb.).— Rare. 



M. agglutinans (d'Orb.).— Very rare. 



Jaculella acuta, Br.— Frequent. 



Hyperammina artoorescens (Norm.)— Rare. 



Botellina labyrinthica, Br.— Common. 



Reophax scorpiurus, Moutf— Very rare. 



R. monlliforme, Siddall.— Rare, specimens large. 



