198 TRANSACTIONS OF THE [May 18, 
ALUTA, n. gen.* 
Small bivalves similar in form to Aparchites (oval or ovate), 
but having a soft, flexible test, and a fine somewhat distinct 
punctation of the surface. There is no marginal fold or a very 
narrow one. 
ALUTA FLEXILIS,n. sp. (Plate XV., fig. 4.) 
Oval about one-half longer than wide, and having a very nar- 
row rim. At the anterior upper corner is a tubercle (ocular 7”) 
enclosed by a shallow furrow. Towards the back on the upper 
part of the valve (in the only example known) is a broad, shal- 
low, circular pit; irregular undulations impress the surface of 
the valve elsewhere. 
Soulpture.—Minute, rather distinct punctures. . 
Size.—Length, 34 mm.; width, 24 mm. 
Horizon and Locality.—A calcareous band in Div. 1. ¢} at 
Porters Brook, St. Martin’s, N. B. Scarce. 
This species in the position of the ocular (?) tubercle resem- 
bles Primitia oculata of the Protolenus Fauna, but the form of 
the shield is different. The species is also near Walcott’s 
Leperditia dermatoides, which, although figured as ovate (if one 
may judge by the description), include oval forms as well; that 
the author makes no reference to an ocular tubercle, so we find 
it necessary to made a specific description. 
The flexible wrinkled test causes this fossil to be overlooked 
as the embryo of some trilobite, but there is no trace of an axial 
ridge. 
CIRRIPEDIA. 
While skeletons of creatures referred to this group of crus- 
taceans have been found in considerable numbers in the Ceno- 
zoic and Mesozoic rocks they are in lessened numbers in the 
earlier deposits ; and they are more difficult to recognize on ac- 
count of their wide departure in the detail, of structure from 
existing types. Nevertheless we now find Cirripedes recognized 
as members of all the great faunas from the Ordovician onward, 
but the writer is not aware that any remains referable to these 
creatures have been reported from faunas antecedent to the 
Ordovician ; he, however, believes that such remains are present 
in the Cambrian rocks and proposes to describe herein such as 
appear to have belonged to Cirripedes. 
None of these occur contiguous to each other as to suggest 
the remains of one individual such as enabled Dr. Henry Wood- 
* Aluta leather. 
