LITTLE RIVER GROUP, No. II. 99 



as wide as the shell, somewhat conical below, nucleus veiy small. Suture impressed. 

 Aperture unknown. Shell surface smooth and shining. 



Sculpture. — Surface ornamented with numerous sharp ribs, transverse to the whorl, about 

 20 visible on one-half of a whorl. These ribs are not all equally spaced or equally prominent ; 

 one-sixth of a whorl may have them nearly twice as far apart as the rest. While quite dis- 

 tinct on the two last whorls, the ribs are less so than on the upper whorls of the shell. 



Size. — Length, 5| mm. ; width, nearly 2 mm. 



Horizon and localUy. — Dark gray shale of Plant Bed N'o. 2. Fern Ledges, Lancaster, 

 St. John County, N.B. 



This shell is of interest as being the oldest known of its genus. It comes from the 

 plant bed iu which, many years ago, the author found the species of Pulmonate described as 

 Strophites grandœva by Sir Wm. Dawson. Sir William's species shows considerable resem- 

 blance to this but is larger and proportionately shorter. Our species has fewer whoi-lsthan P. 

 veUisIa of the Carboniferous of Nova Scotia, and more than either P. Bigsbyii or P. Vennilion- 

 ensis,the former occurring at the Joggins, N.S., in company with P. veiusta, the latter found 

 in the Coal-measures of Illinois. 



Note on Eurypterella ornata. Matt. 



Among the fossils found in the rocks of the Little River group, described in the writer's 

 former paper, was the above species, which he referred provisionally to the crustaceans, but 

 of whose actual zoological relations it was stated that no satisfixctory evidence was forth- 

 coming ; further knowledge of the associated species leads him now to think that it is more 

 probably an Arachnid of the order Pedipalpi, or Spider Scorpions. The author would, there- 

 fore, suggest a comparison of Eurypterella with the abdomen of species of Geralinura. Zittel 

 figures a species from the Coal-measures of Bohemia, G. Bohemica,^ and Dr. Scudder figures 

 another species, G. carhonaria, from Mazon Creek, Illinois,'^ whose abdomens are similar to 

 Eurypterella. 



There have now been obtained from Plant Bed No. 2, in which this species occurs, the 

 remains of eleven other different kinds of animals, of which eight were air-breathers ; two of 

 the other species were determined by Mr. J. W. Salter, namely, Eurypterus pulicaris and 

 Ampliipeltis paradoxus, both referred to the Crustaceans, and the third was a worm, Sjrirorbis 

 Erianus, described by Sir Wm. Dawson. 



The Carboniferous Spirorbis has frequently been found attached to leaves, and has also 

 been met with inside the trunks of Sigillarian trees ; and the older species found at St. John 

 occurs attached to fossil leaves and stems, often but little mascerated iu the water. The plants 

 with which the animal remains of Bed No. 2 occur, grew along the borders of a marsh, or a 

 very shallow fresh water pond, and were entombed directly on its margin. 



The following is a list of the animal remains of Plant Bed No. 2 : 



Insects.'* — Gerephemera simplex, Scudd., collected by C. F. Hartt and J. W. Hartt. 



Xenoneura antiquorum, Scudd., collected Vjy C. F. Hartt and J. W. Hartt. 



' Treatise on Palseontology, Zittel & Barrois, vol. ii., p. 736. 



' Illustrations of Carboniferous Arachnida, Memoirs, Boston Society of Natural History, PI. 39, fig. 1-3, 1890. 

 ' This arrangement by classes and orders is to some extent conjectural, as will be seen by reference to the 

 preceding pages. 



