OF GALWAY. 23 



Dentalince, and Cristellarice are but poorly represented. Among 

 the Polymorphince. we have the rare Polymorphijia myristiformis, 

 P. complanata^ a species new to Great Britain, and an example of 

 P. compressa^ with a short Entosolenian tube. Globigerifia biil- 

 loides occurs plentifully, and is accompanied by the rarer G. inflata. 



Among the Textidarice and BolivincE^ Textularia difforfiiis is 

 remarkably frequent, Bolhmia IcBvigata and B. dilatata being also 

 more common than usual on the east coast of Ireland j on the 

 other hand, the rarity of Verneuilina polystropha is equally striking. 



The Buliminas, including Virgulina Schreibersii^ are well repre- 

 sented, and the material is especially rich in its Cassidulmce and 

 DiscorbincE^ of the latter, the frequency of the beautiful Disco7-bma 

 Parisiensis and of D. Wrightii is remarkable. The latter often 

 occurs double and sometimes treble, the faces of two or more spe- 

 cimens being appHed together, suggesting a process of gemmation 

 or embryonic adhesion (as also the double and probably trigonal 

 Lagenas). D. orbicularis — first noticed as British by Balkwill and 

 Wright, in their Dublin shore-gatherings — occurs seldom in the 

 typical form, but its wild-growing variety is extremely common. 



Operculina ammonoides^ of which we have a few specimens, is 

 not often met with. 



These general remarks must close by the notice of a Ramidina^ 

 new to Britain, of which the species is as yet undecided. 



POECELLANOUS GROUP. 



CoRNUSPiRA iNVOLVENs. — This consists of a fine tube, spring- 

 ing from a central chamber or umbo, and after two or three turns in 

 the same plane, the diameter of the tube, which is nearly circular, 

 increases considerably. This species is often found in half-tide 

 pools. 



BiLOCULiNA DEPRESSA. — A broadly oval, flat Biloculina, with a 

 linear aperture extending the whole breadth of the somewhat trun- 

 cated anterior end ; this and a broad, flat margin are formed by 

 the junction of the two surfaces. As in the MiliolincE^ the cham- 

 bers open at alternate ends of the shell. Extremely plentiful in 

 the deeper parts of the Irish Sea \ it is rare here. 



