part J A(I.ISI.\.\ AM) Ari.isniDHs. /;> 



coUet'tioii contains sonn- tioni Dvkcs, Kilbirnif, one nt" wIiIlIi lias 

 the i)n)t<H.'oni'li well jn-i'stTvcd. A new drawing ( IM. \'l, lii^. 2) of 

 the protoeoneli (»f tlie «)riginal example is j<iven, as the tit^un* VMt 

 does not show that it slightly overhani^s the sj)iiv. With the 

 excej)tiou of the holotype most of the specimens found are small, 

 and if it were not for the existence of a shell of intermediate size, 

 these small examj)les mii^ht he considered to constitute a distinct 

 s})ecies. 



Holotyp.-. Oi>. rif. |.I. iv. fi--. \:\. 0>llecti<»n of Mr. .I..l»n 

 Smith. 



Locality and iiorizou. -j^aw. Dairy, in the Lower Linie- 

 >tone Series. 



The medium-sizetl specimen is from the same loeality, and is in 

 the siime c<>lleetion. 



AcLisiNA rAi{vri,A Donald. 



AcliaiiM parruhi Donald, 18S)H, op. cit. p. (U Si. j)!. v. (ig. 1. r tig. •_'. 



Kemarks. — A. jmrvnla differs from A. piinilht by its more 

 convex whorls, dee})er sutures, and sj^reater spiral ani,'le. There are 

 two additional specimens in the collections of Mr. Hennie and 

 ^[r. Smith, which occurred respectively at Law, Dairy, and Dykes. 

 Kilbirnie, in the Lower Limestone Series. I feel douhtful about 

 the specimen rej)resented by tii^. 2 being really this species, and I 

 think that it is most probably an immature example of A. ptisiUa. 



Holoty])e. — Op. cif. ])1. V, tig. 1. Longstaff Collection. 



Locality and horizon, -(.'rawlield Quarry, Beith (Ayrshire), 

 in the Lower Limestone Series. 



ACLTSINA TEKKHUA Donald. 



Aclisina ten-bra Donald, IHUH, (>j>. rif. p. «i.i Si pi. iv, i'vj;. 1(1. 



Holotyi)e. — OjK ('if. pi. iv, tig. 1(5. Young Collection, Kelvin - 

 grove Museum, (ilasgow. 



Locality and horizon. -C'rawfield (Quarry, Meith, in the 

 Lower Limestone Series. 



There is another s|)ecimen in my own collection from Liw. 

 Dairy, al.so in the Lower Limestone Series. 



Aclisina stuiatissima DonaM. ( Tl. \1. figs. 3 <\L -1.) 



Aclisina ijiia</ra(a var. .ttrinti.ssinia Duiiald, 1898, ov, cif. \>. «»l & pi iv 

 Hg. 12. 



Remarks. — I consider that this form should be rcg:irded as a 

 distinct sj)ecies rather than as a variety of A. ({tiadrnta. Unfortu- 

 nately, the shell originally ligured has j)erished with the Himter- 

 Selkirk (.'oUection, I therefore suggest as holotype the s|)ecimen 

 mentioned at that time as having been pn-sented to me bv 

 Dr. .lohn Young, from the same loeality. It is brt»ken, and onlx 

 six whorls remain, which = Ii'25 millimetres in length, and not 

 quite 1 mm. in wiilth. The surface is wi'll })reserved, and shows 

 the ornamenting stri;e distinctlv. I lii:i,ri. now tlie pmtoeojich 



Q. J.G. S. -No. 290. 11 



