82 MRS. JANE LOXGSTAFF ON [voL IxXlli, 



ACLISOIDES ? AEMSTRONGIANA Doiialcl. 



Aclisoides striatula, vav. armstrongiana Donald, 1898, Q. J. G. S. vol. liv, 

 pars, p. 68 & pi. v, fig. 9 [exclude tig. 10]. 



Diagnosis. — Shell elongated, conical, composed of more than 

 eight whorls. These are slightty angular a little beloAV the middle, 

 flat above, and convex below. The ornamentation consists of six 

 threads on the lower two-thirds of the whorl, the three upper of 

 which are the strongest and suggest a sinual band. Lines of 

 growth unknown. Sutures deep. Aperture longer than wide ; 

 inner lip reflected on the body-whorl. Columella nearly straight. 

 Base convex, slightly produced. 



Remarks. — I formerly considered this a variety of A. striatula 

 (De Koninck), but I now believe it to be a distinct species, and 

 therefore give a fresh diagnosis. It is distinguished from A. stria- 

 tula by its less convex contour, more angular whorls, and deeper 

 sutures, as well as by the disposition, number, and relative strength 

 of the ornamenting threads. I can only refer this species to 

 Aclisoides with a query, as none of the specimens met with have 

 the protoconch oi' lines of growth preserved. It is quite ])Ossible 

 that the discovery of better examples may prove it to bek)ng to 

 Aclisina. 



Holotype. — Op. cit. pi. v, ^^. 9. Bennie Collection: Ko3^al 

 Scottish Museum, Edinburgh. 



Dimension s. — Length = 10 millimetres ; Avidth = 3 mm. 



Locality and horizon. — Law, Dairy, in the Lower Lime- 

 stone Series. Besides the holotyj)e there are two smaller specimens 

 from this locality in the same collection, and Mr. J. Smith has 

 two examples from Dykes, Kilbirnie, also from the Lower Lime- 

 stone Series. 



EXPLANATION OF PLATES V & VI. 

 Plate V. 



Fig. 1. Adisinn pnlchra 'De'Kormn:^. Holotype, X 3. Touriiai. Brussels 

 Museum. (See p. 68.) 



Figs. 2 (/ tt 2 h. Acliaina pulclira De Koninck. Fig. 2 a. Slightlj^ flattened, X 3. 

 Fig. 2 6 Portion of fifth whorl, X 12. Tournai. Dorlodot 

 Collection. 

 3(1 &3b. Aclisina reintsta, sp. nov. Fig. 3a X 5. Fig. 3 b Body- 

 whorl, X 9. Law, Dairy. Bennie Collection, Eoyal Scottish 

 Musevim, Edinburgh. (See p. 69.) 



Fig. 4. Aclisina faber, sp. nov. Back view, X 7*5. (See p. 70.) 



Figs. 5a-5c. Aclisina faber, sp. nov., juv. Fig. 5 a. Front view. X 22*5. 

 Figs. 5 6 & or. Different views of the protoconch. X 26. High 

 Smithston, Kilwinning. Collection of Mr. John Smith. 

 (ja 6c. Aclisina ilelica' ula, sp. nov. Fig. 6a. Back view, x !<>• Fig. 



6 b. Aperture, X lo. Fig. 6 c. Protoconch, x 26. Longstaff Col- 

 lection. (See p. 71.) 



7rt & 7 b. Aclisina micnla, sp. nov. Fig. 7 (f. Back view, x 15. Fig. 



7 b. Protoconch, X 26. High Smithston. Collection of Mr. John 

 Smith. (See p. 71.) 



Fig. 8. Aclisina siniil is Donald. Protoconch, X 26. High Smithston. Col- 

 lection of Mr. John Smith. (See pp. 71 72.) 



