254 MISS JANE DONALD ON IHE GENERA [May 1 899, 



to this genus ; and, as Billings says that M. Missisquoi from 

 the same formation greatly resembles it, perhaps it should be 

 referred here. But the species is not figured, and neither it nor 

 M. Adelina shows the lines of growth ; therefore we can only be 

 guided by the general form of the shell, which appears to agree with 

 that of members of Ectomaria. Ulrich & Scofield refer several 

 species to Solenospira from the Hamilton and St. Louis Groups of 

 America, and also from the Devonian and Carboniferous of Europe. 

 Some of the latter, they state, having more than four revolving 

 keels, may belong to Aclisina. In this surmise they are certainly 

 correct in one instance (M. tenuis, De Kon.), but the other Carboni- 

 ferous species mentioned belong to different genera. 



Ectomaria pagoda (Salt.) var. Peachii nov. (PI. XXI, figs. 1 & 2.) 



Description. — Shell elongated and turreted. Whorls angular, 

 more than eight in number, wide in proportion to the height. Orna- 

 mentation consisting of a strong keel near the middle of the whorl, 

 with another equally strong about midway between it and the suture ; 

 there is also a slighter keel above, immediately below the suture, 

 and an additional keel below on the body-whorl. The uppermost 

 space is the widest, and the other two spaces are nearly equal, the 

 lowest being but slightly narrower than that next above. Lines of 

 growth indistinct, apparently sloping backward to the middle space 

 and forward again below. Aperture imperfectly known. 



Remarks and Resemblances. — Some shells in the Geological 

 Survey Collection, Edinburgh Museum, resemble Eunema (1) pagoda, 

 Salt.^ so closely that I consider it better to regard them as a variety 

 of that species, rather than as constituting a distinct species. I 

 designate this variety Peachii after its discoverer. It agrees with 

 the type in having angular whorls, ornamented by the same number 

 of keels, but it differs in having the lowest space narrower than 

 that of Salter's figure, and the whorls are also rather wider in 

 proportion to the height. 



In the British Museum (I^at. Hist.) there is a piece of rock 

 (^0. G. 11489) from AUumette Island, River Ottawa, on which 

 there is one fairly good specimen of a keeled shell, and also frag- 

 ments of two others which accord very nearly with Salter's figure 

 and description of E. pagoda. Associated with them there is also 

 a smooth shell similar to Hormotoma gracilis, Salt. These fossils 

 were originally presented to the Museum of Practical Geology, 

 London, by Sir W. Logan, but were transferred to the British 

 Museum in 1880. The type-specimens described by Salter as 

 E. pagoda and H. gracilis were collected by Sir W. Logan at Ban- 

 quettes Rapids, at the eastern end of Allumette Island. The keeled 

 shells in the Museum vary slightly from Salter's type, as figured, in 

 having the lowest space about equal with, instead of wider than 

 that above ; in this character they are intermediate between the 

 type and the Scottish examples. They, the typical E. pagoda, and 



1 Geol. Surv. Can. ' Canad. Organ. Eem.' dec. i (1859) p. 30 & pi. V\, fig. 5. 



