CANADIAN PERIOD. 

 HYDROZOA. 



Genus PHYLLOGRAPTUS Hall. 



PHYLLOGRAPTUS LORINGI (sp. nov.) Stipe apparently having the 

 usual quadripartite form of the genus, the foliate expansion having a 

 somewhat irregular elongate oval outline and a moderately narrow axis ; 

 cellules leaving the axis at different angles with it in different parts of 

 its length, ascending along the middle portion so as to form an acute 

 angle with the axis and sweeping outward with an increasing curva- 

 ture to the lateral margins, where they are at right angles with the 

 axis, or, in some cases, slightly recurving. Toward the apex the cel- 

 lules are less curved and form more acute angles with the axis. Each 

 cellule gradually but slightly increases in size as it passes outward to 

 the margin, where there are thirteen or fourteen in the space of a centi- 

 meter. Each cellule is provided at its aperture with a strong, prominent, 

 recurving, lower lip, the edges of which, in our specimen, it being com- 

 pressed, have the appearance of spine-like appendages. Being broken, 

 also, at the lower end, its form there, and the fall length, are not accu- 

 rately known ; but the full length was apparently about four centimeters ; 

 width, at about midlength, one and a half centimeters. 



Dedicated to the memory of Mr. F. W. Loring, who was murdered by 

 the Apache Indians in October, 1871, while a member of one of the 

 exploring parties. 



Position and locality. Strata of the age of the Quebec group, Fish 

 Spring, House range, Utah. 



4 



BEACHIOPODA. 



Genus ACROTRETA Kutorga. 



ACROTRETA PYXIDICULA (sp. nov.) Shell minute ; marginal outline 

 subcircular or transversely suboval, without observable mesial sinus 

 or fold. Dorsal valve moderately convex, most prominent near the 

 umbo ; beak small, depressed but well defined, hardly projecting beyond 

 the hinge-line ; cardinal angles rounded ; hinge-line short, nearly 

 straight ; lateral and front margins regularly rounded. Ventral valve 

 obliquely depressed-subconical ; apex acute, prominent, and perforated 

 by a minute foramen ; margin in front of the hinge-line regularly rounded ; 

 area small, triangular, nearly flat, the angles it forms with the sides of 

 the shell rounded. 



Surface of both valves smooth or marked by very fine concentric lines 

 of growth. 



Width, two millimeters: length, a little less ; height, a little less than 

 the length. 



This species seems to possess all the generic characteristics of 

 Acrotreta, except that the ventral valve is not so much elevated as is 

 usual in that genus. 



Position and locality. Strata of the age of the Quebec group, Sohell- 

 bourne, Schell Creek range, Nevada. 



Genus LINGTJLA Bruguiere. 



LINGULA ? MANTICULA (sp. nov.} Shell small, elongate-subovate or 

 subelliptical, broadest at or a little behind the midleugth ; beaks 



