The Crinoidea of the Lower' Niagara Limestone. 303 



little over half of the calyx. I was at first inclined to publish it as 

 a EucaJyptocrinus, but upon mentioning it to Chas. Wachsmuth, 

 Esq., of Burlington, Iowa, to whom a diagram of the species jvas 

 sent, he called my attention to its being a Callicrinus. I quote 

 from a letter of his to myself, dated March 21, 1888. 



" The specimen of which you send the diagram is in my opinion a Callicrinus 

 (Angelin) and not Ettcalyptocrimts. The genus Callicrinus has not heretofore 

 been recognized from America, but I judge from some excellent specimens 

 which I examined lately from Wisconsin, that not only your new species but 

 also Hall's Eucalyplocrinus r.ornutus should be referred to it, and probably 

 Roemer's Eucali/ptocrinus ramifer.'''' 



From the Lower Limestone of the Niagara Group, Lockport, 



N. y. 



Note. — All the plates and their relative proportions as figured in the restora- 

 tion can be observed in the type specimen, which shows the interior of the 

 calyx and a small portion of the exterior, with four nearly perfect spines. 



I also wish to express my indebtedness to Chas. R. Keyes, Esq., who at the 

 request of Mr. Wachsmuth sent me a tracing of C. murchisonianits, from Icono- 

 graphiu Crinoideorum in stratis Succice siluricus fossilium, page 15, Tab. xxviii, 

 fig. 14, which will be found reproduced on the same plate (PI. Ill, fig. 2) with 

 C. acanthinus for comparison, and on account of its being of interest in exhibit- 

 ing parts of the calyx not shown by the specimen from the Niagara, as this is 

 the first publication to my knowledge of this genus here, although as before 

 stated the credit of the generic identification is due to Mr. Wachsmuth. 



o"- 



Dendrocriniis? nodi1>rachiatiis n. sp. PL III, fig. 6. — Calyx 

 small, campanulate ; sides incurved, evenly tapering to base, which is of the 

 same size as the upper end of the column ; rim spreading. Ventral tube long 

 and in its (apparently) compressed condition, about one-half as wide as the 

 diameter of the top of the calyx. Arms ten, long, not tapering till near the 

 end, with nodose joints ; pinnulate ? Column round, composed of unequally 

 arranged joints, having wide and narrow median rims. Under basals five, as 

 wide as high, pentagonal. Basals hexagonal, with the exception of the poste- 

 rior, which supports the anal upon its truncate top. Third or radial ring com- 

 posed of seven plates — five radials, an azygous, and a large anal. Radials 

 broad, pentagonal, except the right posterior, which is quadrangular and 

 elevated above the plane of the rest by the underlying large azygous, which 

 is pentagonal and of nearly the same size as the rest of the radials, and rises 

 to the same level, lifting the radial above it to the same position as is occupied 

 by the first brachial plates in the other series. Anal plate large, subhexa- 

 gonal, extending up as high as the right posterior radial ; but one other plate 

 belonging to the anal area can be made out in the type specimen — this is 

 slightly smaller than the first, and rests upon its upper face. Brachials 3X5; 

 of the same character as the arm joints ; on each third brachial a bifurcation 



