﻿Vol. 6r.] THE SILURIAN KOCKS OP LL1NGAD0CK. 577 



five whorls. Whorls convex, ornamented above by four strong 

 keels, the intervening spaces unequal in width. Lines of growth 

 distinct and close together, crossing the keels obliquely. Aperture 

 subcircular. Umbilicus open, wide. 



Kemarks and Resemblances. — There are two examples of 

 this form, the wax-impression of only one of which shows the orna- 

 mentation distinctly. The base of both is embedded in the matrix. 

 On the body-whorl of the best-preserved specimen an additional 

 keel is seen below the four, and there are traces of a fine thread in 

 the middle of each of the two lower spaces. Sowerby's actual 

 type of this species is wanting in his Collection in the British 

 Museum (Natural History) ; but there are two specimens in it from 

 the Wenlock Limestone (43623), which are marked Euomphalus 

 funatus and agree with his description. I have compared the wax- 

 impressions with these examples, and they appear to agree with them 

 -as well as with Sowerby's figures in the ' Mineral Conchology,' and 

 also with other specimens in the general collection. Some of these 

 show the aperture to be circular, also the operculum ; the umbilicus 

 is open and of moderate size, and there are at any rate four additional 

 keels on the base ; one or two specimens show also a fine inter- 

 calated thread between the keels. Lindstrom * considered Euomphalus 

 funatus, Sow. identical with Trochilites globosus, Schlotheim. I am 

 guided by his opinion in this, as he had the opportunity of examin- 

 ing Schlotheim's type in the Museum of the University of Berlin, 

 -an opportunity which I have not had. 



Dimensions. — The length of the specimen figured (PI. XXXVII, 

 fig. 16) is 15*5 millimetres, and the width 11 mm. 



Horizon. — (90) Wenlock. 



Etheridge recorded Euomphalus funatus from the Upper Lland- 

 overy, the Woolhope Limestone, the Wenlock Limestone, and the 

 Aymestry Limestone. 



Lindstrom recorded this species from all the Silurian strata of 

 •Gothland. 



EXPLANATION OF PLATE XXXVII pars. 



Fig. 3. Plethospira (TJlrichospira) similis, sp. nov. X 3. (See p. 569.) 



4. Bembexia (?) Groomii, sp. nov. X 6. (See pp. 569-70.) 



5. Bembexia (?) sp. X 3. (See p. 570.) 



6. Murchisonia (Goniostropha) Cambria, sp. nov. X. 6. (See p. 571.) 

 Figs. 7-9. Loxonema Grindrodii, Don. ("?). Fig. 7. X 2. Fig. 8, front view. 



X 2. Fig. 9. X 4. (See p. 572.) 

 Figs. 10 & 11. Gyronema Octavia (d'Orb.). Fig. 10. X 3. Fig. 11, back 

 view of base. X 2. (See p. 575.) 

 12 & 13. Gyronema Octavia, var. glabrum, Lindstrom. Fig. 12, aperture. 

 X 2. Fig. 13, back view. X 2. (See p. 575.) 

 Fig. 14. Gyronema Octavia, var. interstriatum nov. X 2. (See p. 575.) 



15. Gyronema Octavia, var. fasciatum nov. X 2. (See p. 575.) 



16. Bolytropina alobosa CSch'loth.). X 2. (See p. 577.)' 



1 'Silurian Gastropoda & Pteropoda of Gotland' Kongl. Svensk. Vet.-Akad. 

 Handl. vol. xix (1881-84) No. 6, p. 162. 



Q. J. G. S. No. 243. 2 s 



