Dr. W. B. Carpenter on Eozoon canadense. 371 



and the prseopercular margin. The first anal ray corresponds 

 to the fourth or fifth of the dorsal fin. Anal fin much higher 

 than long. Brownish olive, with numerous dark greenish in- 

 distinct cross bands (in the male). 



A single male specimen, 3 inches long, has been sent by 

 J. Matthew Jones, Esq., from the Bermudas. 



MoUienesia Jonesii. 

 D. 12. A. 10. L. lat. 29. L. transv. 9. 



Female. The height of the body is two sevenths or one fourth 

 of the total length (without caudal), the length of the head 

 one fourth. The diameter of the eye is rather shorter than 

 the snout, one fourth of the length of the head, and one half 

 of the width of the interorbital space. The length of the 

 dorsal fin is one fourth of the distance between the eye and 

 root of the caudal ; it is much longer than high. Anal fin 

 small, opposite to the middle of the dorsal. Lateral line none. 

 Brownish, each scale with a deep-black hind margin ; a black 

 band between the eye and scapula ; a round black spot on the 

 upper half of the root of the caudal. Dorsal fin with two or 

 three series of black spots ; anal with a black line behind and 

 along each ray ; the other fins immaculate. 



This species was discovered by T. M. Rymer Jones, Esq., 

 in a volcanic lake, Alcohuaca, near Huamantla, in Mexico, 

 8000 feet above the level of the sea. Several specimens were 

 presented by him to the British Museum : all are females ; and 

 the largest exceeds somewhat the length of 3 inches. 



XL VIII. — Final Note on Eozoon canadense. 

 By William B. Carpenter, M.D., LL.D., F.R.S. 



To the Editors of the Annals and Magazine of Natural History. 



Gentlemen, 



As it is obviously impossible to carry on any discussion 

 without some common basis of agreement, and as Profs. King 

 and Rowney have now made it clear that no such basis can 

 exist between them and myself, it is not my intention to trouble 

 you with any reply to their last Paper. 



For (1) my opponents deduce, from their examination of a 

 few specimens of a single Foraminiferal type, what they affirm 

 to be " Foraminiferal impossibilities; " and (2) under the pre- 

 conception thus formed they refuse to credit my statement of 

 an objective fact, viz. the existence of an unmistakable "num- 

 muline tubulation " in a specimen of Eozoon which they have 

 not examined. 



