338 MISS DONALD ON PROTEROZOIC GASTEROPODA  [ May 1902, 
belong to this genus, it is the earliest known representative, for 
none older than the Devonian have been recorded previously. 
Dimensions.—The length of the largest example=14 milli- 
metres, and the width=5 mm. Its five upper whorls are merely 
represented by their impression left in the matrix. The smaller 
shell=about 9 mm. in length. 
Locality and Horizon.—Woodland Point (Ayrshire), in beds 
of Middle Llandovery age [Lapworth]. 
EXPLANATION OF PLATES VII-IX. 
Puate VII. 
Fig. 1. Murchisonia (2) dudleyensis, sp.nov. Wax-impression, X13. Dudley. 
Museum of Practical Geology, London. 
Figs. 2-4. Goniostropha (2%) elegans (Sollas). Wax-impressions. Fig. 2. 
Type, partly embedded, x 4; fig. 2a. Outline of whorl, x 6; 
Fig. 3. Specimen with band more nearly central, X 4. Rhymney 
Quarry, Cardiff. Bristol Museum. Fig. 4. Specimen with whorls 
more exsert, X 3. Tymaur Lane, Rhymney, Cardiff. Cardiff 
Museum. 
5 & 6. Cyrtostropha corallii (Sow.). Fig. 5. Front view, embedded in 
coral (Stenopora fibrosa var. incrustans), X 2; fig. 5a. Portion 
of whorl, x 4. Grindrod Collection, University Museum, Oxford. 
Fig. 6. Wax-impression, back view, x 4. Lily Mere. Collection 
of the Rev. M. 8. Donald. 
7&8. C. scitula, subgen. et sp.nov. Fig.7. Back view, partly embedded, 
x 2; fig. 7a. Portion of eighth whorl, x 6. Locality unknown. 
Grindrod Collection, University Museum, Oxford. Fig. 8. Young 
specimen, X 6. Chance’s Pitch, Malvern. Worcester Museum. 
9&10. C. bicincta (M‘Coy). Fig. 9. Type, partly embedded in matrix, 
x 4. Fig. 9a. Portion of second whorl from base, x 12. Chair 
of Kildare. Museum of Science & Art, Dublin. Fig. 10. Sinistral 
variety, partly embedded, x 4. Chair of Kildare. Museum of 
Practical Geology, London. 
Fig. 11. Ketomaria girvanensis, Don. Portion of body-whorl showing lines 
of growth, X 2. Minuntion (Ayrshire). Gray Collection. 
Puate VIII. 
Fig. 1. Cyrtostropha torquata (M‘Coy). Front view from wax-impression, 
x 4. Fig. la. Single whorl of another specimen, x 5. Lily 
Mere. Collection of the Rev. M. S. Donald. Fig. 1b, x 5. 
Kendal. Carlisle Museum. 
Figs. 2 & 3. C. obscura (Portl.). Fig. 2. Front view of type, greatly com- 
pressed, X 2; fig. 2a. Portion of a wax-impression of a whorl, 
taken from the cavity in the. matrix made by part of fig 2, x 3. 
Fig. 3. Back view of another specimen, slightly compressed, X 2. 
Desertereight. Museum of Practical Geology, London. 
Fig. 4. C. robusta, subgen. et sp.nov. Front view of specimen, x 13. Thraive 
Glen, Gray Collection. Drawn from a photograph. 
5. C. Ordovizx, subgen. et sp. nov., X 2. Fig. 5a. Portionof whorl, x 4. 
Shalloch Mill. Gray Collection. 
6. Goniospira filosa, sp. nov., X 2. Fig. 6a. Body-whorl, x 3. Shalloch 
Mill. Gray Collection. Drawn from a photograph. 
Figs. 7 & 8. Turritoma (?) polita, sp. nov. Fig. 7. Back view, slightly crushed, 
making the spiral angle appear rather wider, xX 3. Fig. 8. 
Specimen embedded in matrix, x 3. Shalloch Mill. Gray Col- 
lection. Drawn from a photograph. . 
