106 INFERIOR OOLITE AMMONITES. 



descendant of L. Murchisonce, and if it were any advantage it could be written of 

 as L. Murchisonce mut. Lucyi ; bu*t since L. Murchisonce is, of course, the mutation 

 of something else, the only result would be that the more species, and therefore 

 the more links we obtain, the longer the chain of such names that can be strung 

 together. 



The name given to this species is a token of respect to the able President of 

 the Cotteswold Naturalists' Field Club, Mr. W. C. Lucy, F.G.S., &c, to whom I am 

 indebted for the kind present of the specimen shown in Plate XXI, figs. 10, 11. 



Ludwigia Lucyi occurs in the Concavum-beds, that is to say, in an horizon 

 distinctly above the stage characterised by L. Murchisonce and certain other 

 species peculiar thereto. The type-forms all came from Bradford Abbas ; but the 

 species is very scarce. The variety was labelled " Yeovil," 1 which, judging from 

 its matrix, I interpret as Halfway House (Sherborne), Dorset. 



Plate XXI, figs. 3, 4, represent the side and front views of a fine type-specimen 

 with its test fairly preserved ; figs. 5, 6, are similar views of a smaller specimen, 

 also with very well-preserved test ; fig. 7 is the side view of another but smaller 

 specimen, with test complete, and showing the ribbing characteristic of the genus ; 

 fig. 8 illustrates the side view of a very young specimen, with test ; and fig. 9, the 

 front view of the same specimen, showing that the carina had not been developed 

 at this stage. All these specimens were collected by myself at Bradford Abbas. 

 Dorset. Fig. 10 gives the side view of the variety; fig. 11 shows the front view. 

 The top and bottom of this figure illustrate the section of the ventral area with 

 the test preserved ; but at the point of re-entry, and on the greater part of the 

 ventral area depicted, there is no test. 



In Plate A, fig. 5, a tracing of the suture-line is shown. This was taken from 

 a portion (an additional detached piece not placed upon the plate) of the last 

 specimen. It shows the true characters of Ludwigia. The small size of the 

 inferior lateral and auxiliary lobes is noticeable, and also the manner in which 

 they are elevated. 



1 Teovil is a town in the adjoining County of Somerset, and is upon the Middle Lias. Having 

 been for many years the residence of dealers, it is given as the locality to a vast number of Inferior- 

 Oolite fossils scattered over England and the Continent. The error is also preserved in both the 

 London Museums. Many of the fossils so labelled came from as far off as Sherborne in Dorset ; but 

 there was in some cases a desire to keep the particulars as to locality as secret as possible ; and the 

 effects of untrue information on this head can be traced, both directly as regards localities and 

 indirectly as affecting conclusions, in the literature on the Inferior Oolite of Dorset. Fortunately, 

 the matrix at the different localities varies in so many ways — even on the same horizon — that anyone 

 who has had thorough experience in collecting Dorset-Somerset Inferior- Oolite specimens can 

 generally say at once, and with perfect confidence, from what localities the specimens have been 

 obtained, whatever may be stated upon their labels. 



