574 MISS J. DONALD ON NEW AND LITTLE-KNOWN 



Museum, and they are so much alike that I think the discovery of 

 better-preserved individuals would most probably prove them to be 

 the same species. There is only one of M. maxima, the surface of 

 which is very imperfect, and the shell is flattened by pressure. The 

 band is obscure, but seems to be in the same position as in 

 Cerithioides telesco^ium, and there are traces of grooves on the base. 

 Of Olyptobasis conica there are two specimens, both badly preserved 

 and more or less contorted by pressure. It agrees with Cerithioides 

 telescopium in form and in having a grooved base, but there is no 

 evidence of the existence of a sinual band ; this band, however, is so 

 superficial that it could only be visible on well-preserved shells. 



I have met with eight specimens of this species, none of which 

 are entire. Six of these are Irish, and they are all more or less 

 compressed. I am indebted to Mr. J. Wright for the loan of three, 

 two of which were figured by Prof. Haughton. The largest (PI. 

 XYII. fig. 5) consists of about five and a half whorls, the base is 

 embedded in the matrix, and the apex is broken. Length about 

 94 millim. ; width of body-whorl one way 47 millim., the other 

 40 millim. A smaller specimen (PI. XVII. fig. 4) has ten whorls 

 and the apex embedded in the matrix ; it is figured by Prof. Haugh- 

 ton, and has a length of 67 millim., width 36 millim. The other 

 figured by Prof. Haughton has only two and a quarter whorls in a 

 length of 48 millim. 



Locality. Near Cork. 



In the Museum of Queen's College, Cork, there is a fragment 

 consisting of two and a half whorls from Windmill Quarry, Cork. 



A specimen (PI. XVII. fig. 1) in Trinity College Museum, Dublin, 

 has eight whorls preserved ; the apex is broken, and the shell is 

 greatly compressed, so as to make the sutures appear much more 

 oblique than they would be in the natural condition. Length 70 

 millim. ; width of body-whorl about 40 millim. ; height about 20 

 millim. Locality. Little Island, Cork. 



There is a large specimen of about nine whorls in the collection 

 of the Geological Survey, Dublin. Surface badly preserved. Length 

 87 millim. Locality. Kilgrogan, Limerick. 



The British Museum (Natural History) possesses two specimens of 

 this species which are not contorted by pressure, and the whorls are 

 slightly more convex. They a-re both broken, but the surface 

 of that in the Gilbertson Collection is well preserved, showing 

 the lines of growth distinctly. Neither has the base entire, but 

 one is so fractured across the top that the impression of some of the 

 grooves on the base of a higher whorl is left on the upper part of the 

 lower whorl. The shell (PI. XVII. fig. 8) in the Gilbertson Collec- 

 tion has part of four whorls preserved, but only the second and third 

 are entire. Length about 62 millim. 



Locality. The specimen in the Gilbertson Collection is from Bol- 

 land ; the locality of the other is unknown. 



Formation. Carboniferous Limestone. 



