l>art 21 Ac/J.s/\.i AND .\( List)ii)h:s. SI 



Till' holotype of M. auhsulcatu has eight wliorls in a length of 

 18"5 millimetres; its greatest width=G'75 nnn., and the depth 

 of the sinus = alM)iit 2o mm. 



I give new drawings of these shells in Pi. \'I, ligs. 10-13, 

 whieh should l)e eom|xired with the figures 4, (I, 7, 8, Si 10, of 

 j)l. V, g. .1. (i. S. vol. liv (ISyS), as well as with rtgs. 1-4 & lo, 

 IM. VI, of this paper. 



Loeality and liori/on. — Vise, Assise vi. 



This speeies has -previously been stated to occur at Settle^ in 

 England ; at Craigenglen in the Lower Limestone Series, and at 

 Uleneart. Dairy, in the Upper Limestone Series, in Scotland. 

 SiK'cimens from the P]nglish loeality greatly resend)le in size and 

 character those from Vise, as do also two from Craigenglen. One 

 of these hist is in the Royal Scottish Museum. Edinburgh ; the 

 other Ixdongs to Mr. .1. Smith, and is rather larger and better 

 preserved: it has eight whorls in a length of 17 millimetres, while 

 the greatest width = 6 mm. The exam])les from Glencart, like the 

 other gastero|)oda from that locality, are very small. 



^Fr. Kobert J)unlo]) jiossesses the best series that I have seen : 

 it consists of ten specimens which are for the most ])art large, with 

 the sui-faee wondei-fuUy well preserved, showing the sinual band, 

 lines of growth, and ornamenting threads very distinctly. The 

 latter are especially tine and numerous above the bantl, while thos*' 

 forming the band itself vary in number and strength. In one of 

 the ]»igg<'st examj)les ( PI. VI, Hg. 14) an old lip-margin is pre- 

 served, with a deep sinus : it is evidently not the final outer li]) of 

 the adult, as there are impressions of lines of growth on the matrix 

 showing that the sinus had been filled uj), and that jiai't of the 

 shell-structure had sul)se(piently perished. These specimens were 

 found a quarter of a mile east of Strathavon. in the Lower Lime- 

 stone Series. 



Hesides the small sjx'cimcn pi-cvioiisly mentioned from tlie Lower 

 Limestone Series of Ilairmyres, Mr. .lohn Smiths collection 

 contains two minute examjdes fnun Hrodlie. Dairy, and two others, 

 also small, from Dernshaw, Stewarton ( Ayi*shiri'). from the I'lijM'r 

 Limestone Series. He has also two immatiwe shells from l*o)lva>^h 

 (Ish- of Man). 



The late Mr. .L <i. (ioodehild foinid an external moidd in the 

 Voredale \^v^U on Widdale Fell, Mosedale ( Vorkshire). 



In lielirium this species occurs at Tournai, as well as at Vise. I 

 |M)ssess two -specimens from th«' former locality )»urchase<l from 

 M. I*iret. and tliere are also two in the Mritish M u.seum (Nattiral 

 llistorv). I'nif. L. (I. de K'oninck merelv noted its existence at 

 Vise. 



.Mtogetlii r I have examined about sixty specimens of this s|H'cies, 

 only two (.f which. Itotb from Cniii^enLrlen, have the piotoconch 

 preserved. 



' .NfoKt of tlio siwciiiu'ii."* from this locality ure in the SiHl^fwii-k Mti^»'uni. 

 an<l won- colK'ctiMl by Mr. Bnrr«»w ; they an- iinTrly liiU»<llf.l • ('lu-l.. L«t., 

 Settle." ajul the exact locality is not reconltMl. 



