132 PROCEEDINGS OF THE ACADEMY OF [1888. 



anastomoses into an irresrular network. The branches seem to 

 anastomose as frequently by the growing towards each other of two 

 adjacent branches ; these unite whenever they chance to meet into 

 a common branch, which grows upwards and bifurcates as before » 

 as by the more slender diagonal connecting filaments. 



By reason of this peculiar mode of growth no single bi'anch can, 

 as a rule, be traced for any considerable distance as maintainino; its 

 identity, for as it bifurcates each bifurcation is often met by that 

 from the adjoining two branches and they, by unitiug, form a single 

 branch ; at the outer margin the branches taper down and terminate 

 in from two to more sharp points, or serrations. 



Surfiice of the branches marked by strong, irregular longitudinal 

 Avrinkles, which at times seem to assume a semi-scabrous character. 

 Margins of branches rarely present a slight serration or roughness j 

 and in places where portions of the black corneous branches have 

 scaled off the cast shows the obverse sidft to have the same character 

 as the other. 



The openings in the network are of various sizes and shapes but 

 mostly oval or fusiform, no two being alike. 



The type specimen presents about one third of the circumference 

 of a circle and measures nine c. m. from the niai'gin to as near the 

 center as is preserved and which judging from the angle of radiation 

 of the branches could not be more than one c. m. further. 



There is some hesitancy in placing this species in this genus l)e- 

 cause all the forms which we are acquainted with are rather loosely 

 branching with few if any anastomoses or reticulations. Still the 

 character of the branches so closely resembles those belonging to 

 this genus that I am constrained to place it here. 



From the lower third of the shale at Lockport ranging as high 

 as the Homocrinus band. 



Only two fronds have been found in which the margin is preserved, 

 and both seem to represent portions of a quite regular circle. 



Dendrocrinus celsus (n. s. p.) PI. VII, fig. 3. 



Calyx elongate, cylindrical, slender, quite evenly tapering from 

 the insertion of the brachials to the base which is of the same size 

 as the last joint of the column. 



Height to top of first radials seven millimeters. Width of base 

 two millimeters. Width of top of calyx not quite six millimeters. 

 Arms branched, without pinnules. Under-basals much higher than 



