54 SUPPLEMENT TO THE 



Gen7is — Productus, Sowerbi/, 1814. 



52. Productus SUBACULEATUS, il/«rc/^ Dav., Dev. Mon.,Pl. XX, figs. 1, 2; and Dev. 



Sup., PI. Ill, fig. 22. 



In my description of this species, p. 101 of my ' Devonian Monograph/ I say, " In 

 none of the British specimens that I have been able to see were the spines in place, but 

 some of the French examples still preserved their spines, which were slender, and some- 

 times exceeding half an inch in length ; some may even have attained an inch." Since 

 then Mr. G. F. Whidborne has found at Hope's Nose a specimen in which the spines are 

 seen in place, and these slightly exceed half an inch in length. I have added a figure 

 so as to complete the description of the species. 



Getitis — Chonetes, Fischer, 1837. 



53. Chonetes Hardrensis, PJdllips. Dav., Dev. Mon., PI. XIX, figs. 6 — 8, not 9 ; and 



Dev. Sup., PL III, fig. 24. 



This species is described at p. 94 of my ' Devonian Monograph.' 



At page 039 of his 'Die Brach. des Mittel- und Ober-Devon. der Eifel,' 1871, Dr. 

 Kayser considers Chonetes Hardrensis and sordida, Phillips, to be synonyms of the 

 Chonetes {Terebratidites) sarcinulata of Schlotheim. Chonetes 2^iebeia, Schnur, and Orthis 

 semiradiata and hiradiata of Quenstedt, are likewise added to the synonyms. 



It is probable that Dr. Kayser may be right in his identification and views ; but, not 

 being myself quite certain, I prefer to retain Philhps's species, at all events provisionally. 



Some good examples, with the shell preserved, M'ere found by Mr. Whidborne in the 

 Middle Devonian at Hope's Nose, near Torquay, and of one of these I give a figure. 



54. Chonetes? Phillipsii, Dav. Dev. Sup., PL III, figs. 23, 23«. 



Shell transversely semicircular, somewhat wider than long ; hinge-line straight, as 

 long as the greatest breadth of shell ; ventral valve very convex and convolute, flattened 



