68 MKS. JAKE LO^fGSTAFF OX [vol. Ixxui, 



Mr. James Wright, Kirkcaldy, and Mr. John Smith, Dahy, for 

 the privilege of examining examples in their private collections. 

 Fnrthei', for assistance in many ways I am greatly obliged to 

 Dr. A. Smith Woodward, F.R.S., Dr.'F. A. Bather, F.E.S., Prof. 

 E. J. Garwood, F.R.S., Dr. F. L. Kitchin, the late Mr. G. C. Crick, 

 Dr. F. R. Cowper Reed, Dr. Lee, Prof. S. H. Reynolds, Prof. 

 G. A. J. Cole, M. Louis Dollo, and M. Douville. 



Genus Aclisiis'a De Koninck. 

 AcLisiNA PULCHEA De Koninck. (PL V, figs. 1 & 2 a~2 h.) 



Aclisiiia pidchra De Koninck, 1881, ' Faune Calc. Carb. Belg.' pt. iii, Ann. 

 Mus. Roy. Hist. Nat. Belg. vol. vi, p. 87 & pi. vii, tigs. 26-27. 



Remarks. — L. G. de Koninck represents this species as 

 having the whorls ornamented b}^ seven or eight spiral grooves and 

 ridges of equal size. In reality, however, the upper ridges, from 

 1 to 3 in number, are finer than the three or four below, and on the 

 bod^^-wliorl these latter are followed by numerous still finer ridges, 

 one or two of which frequently show above the suture on the 

 penultimate whorl. On the earlier whorls onl}^ one of the three 

 finer ridges exists, it is immediate^ below the suture. None of 

 the Belgian specimens that I have seen has the apex intact. The 

 sigmoidal form of the outer lip is well preserved in a specimen 

 (PI. Y, fig. 2) in the collection of Canon H. de Dorlodot : this 

 character is only indicated b}^ the lines of growth in all the other 

 species of the genus that I have examined. 



So far, I have not met with an}' typical specimens of this species 

 in the British Isles. 



Holotype.— 0/A c/f. pi. vii, figs. 26 & 27. Also PL V, i\g. 1 of 

 this paper. 



There are two smaller examples associated with the holotype in 

 the Musee Royale d'Histoire Naturelle at Brussels, also a good 

 specimen in the British Museum (Natural History), and I have 

 two otliers purchased from M. Piret. 



Locality and horizon. — Tournai (Assise i). 



AcLisiNA PULCHEA, var. EXiciUA, uom. nov. 



AcUsiiia pulchra var. temiis (De Koninck) Donald, 1898, Q. J. G. S. vol. liv,, 

 p. 52 & 1)1. iii, figs. 1-4. 



Remarks. — I referred a small Scottish variety of A. 2yi(^('-hra 

 to j\Lii'chlsoiiia tenuis De Koninck, because I found that it agreed 

 with the best-preserved shells on a tablet so named in the Binissels 

 Museum. During a subsequent visit a further examination of 

 this tablet convinced me that there were two distinct si^ecies on 

 it. The specimen marked as holotyjDc is much worn, and has only 

 three somewhat coarse threads ornamenting the whorl ; two of the 

 eight exam])les associated with it are the same, and they all look 

 like immature shells. The remaining five are diiferent, and are 

 conspecific with the Scottish shells. These latter greatly resemble 



