20 Proceedings of the Royal Irish Academy, 



0. TJNiDENTATA, (Montagu), auct. 



Logs 11, 17, 21, 22, 28, 33, 34, 55, 63, D; depth, 10 or 20 

 to 808 fathoms, Montagu's Turho imidentatus apparently 

 included the present and at least one other species, Brachystomia 

 eulimoicles, Hanley. In his remarks Montagu notes that the 

 shell has usually a tinge of purple, or rose colour at the tip, 

 and mentions that it was obtained alive on Pecten maximus 

 from deep water. Being acquainted with the latter fact, he 

 must have found etdimoides, the form which so usually is asso- 

 ciated with the Pecten : the apex of the species under consider- 

 ation has only a dull bluish colour, whilst eulimoides is always 

 tinged with either orange or rose. It is worth noting that 

 Turton, Fleming, Macgillivray, Martin, and Yeramy all identi- 

 fied the species associated with Pecten as Montagu's wiiden- 

 tata. 



Bea.ch:tstomia EULiMoiDEs, Hanley, sp. {Odostomia). 



Stations II., YIII. Logs 28, 31, 33, 63, A. 

 Var. EissoiDES, Hanley, var. {Odostomia). 



Logs 6, 25, 35, E, F. 



Var. ALBELLA, Loveu, var. {Tiirlonilla). 



Log 6. Some years ago I ventured to affirm that Clark was 

 right in uniting these forms. Since then I have examined 

 very many examples of the various forms and am still further 

 confirmed in my opinion. 



[B. suBOBLONGA, Jeffreys, sp. {Odostomia). 



Log 37, Mr. Mchols/^^e Mr. J. T. Marshall]. 



Spiralin-a, nov. gen. (non SpiraUna, Giimbel, 1862, = Spirolina, Lam., 

 1804). 



S. spiEALis, Montagu, sp. {Turlo). 



Station YIII. Logs 6, 9, 11, 12, 17, 18, 22, 28, 33, 34, 

 35, 55, 63; depth, 4 to 110 fathoms. This species is a 

 member of a group of closely allied forms widely distri- 

 buted. Its affinities are all with the Bracliystomia group, from 

 which it differs in being sculptured with strong, straight, longi- 

 tudinal costse abruptly terminated (or in some forms abruptly 

 reduced in size to thread-like strise) at the periphery by the first 

 of a series of spiral striae which encircle the base. 



JoEDANiELLA, nov. gen. 



