Dr. Woodivard — Additional Note on So^nalonotus. 157 



Gasteropoda, 

 7. Loxonema ? sp. (PI. IV. Fig. 11.) 



This is merely a cast of a spiral Gasteropod resembling Loxonema 

 (or an elongated form of Holopella from the Upper Silurian). It is 

 probably safest to refer it to Loxonema. It occurs in the same bed 

 ■with Chonetes sordida. 



The only object in figuring these casts is in order to show the 

 associated fossils contained in certain beds in the Lower Devonian 

 slates near Torquay, S. Devon. Even such imperfect materials 

 become of value for purposes of comparison and correlation with 

 the Devonians of North Devon and the Eifel. E.E. 



IV. — Additional Note on Homalonotus from the Devonian. 



By Henry Woodward, LL.D., F.R.S., F.G.S. 



(PLATE' IV. Figs. 1, 2, 3.) 



N the Geological Magazine, November, 1881, I published a brief 

 description, accompanied by a Plate, of a new species of spinose 

 Homalonotus, which I named after its discoverer, H. Champernownei. 



On tbe accompanying Plate IV. Fig. 3, I have given an illustration 

 df the tail probably referable to the above-named species. 



The specimen gives evidence in the axis of about twelve coalesced 

 caudal rings, the anterior of which were ornamented with a double 

 row of spines. The extremity of the pygidium is produced into 

 a blunt robust spine or mucro, whicb was probably considerably 

 longer than the specimen now shows it to be, being only preserved 

 as a cast. 



The axis of the caudal shield is narrow and strongly annulated, 

 save the last eight lines, which are smooth and somewhat more 

 contracted, the axis diminishing from ten lines in breadth in front, to 

 five lines near the hinder part of the shield. The side ribs are 

 about six in number, and fade gradually away near the margin, 

 which is smooth, and slightly elevated. 



The specimen is much distorted by slaty cleavage. 



Formation and Locality. — From the Red Homalonotus bed, top of 

 the Lower Devonian, New Cut, Torquay. 



Collection of A. Champernowne, Esq., M.A., F.G.S. , Dartington 

 Hall, Totnes, Devon. 



The specimen (Fig. 1) on our Plate represents a tail of Homa- 

 lonotus, obtained by E. B. Tawney, Esq., M.A., F.G.S., from 

 Smuggler's Cove, Torquay, S. Devon. This pygidium is very 

 distinct in form from the preceding one. It measures 11 lines in 

 breadth at its proximal border, and 12^ lines in length. 



The axis is very broad in proportion to the lateral portions, and 

 the division between them is but slight. 



Breadth of axis at proximal border 6 lines. It is composed of 

 from 12 to 13 annuli or coalesced caudal rings, the corrugations 

 of which are slightly bent downwards on each side, and continued 

 to the border of the pygidium as well-developed side ribs. The 



