142 
PALEONTOLOGY OF NEW-YORK. 
Genus LIMARIA (Steininger). 
Small, ramose ; coralla quite solid, cells with a subtriangular aperture ; calicles none. 
I have included under this genus a single species which is not ramose ; this one has the 
internal structure and form of aperture which characterizes the ramose species. The cells in 
different species open by a subtriangular or transversely extended sinuate aperture; the tubular 
cell is flattened near the aperture, and angular below as shown in transverse sections of the 
stems. With the exception of the form of cell and aperture, their structure and mode of 
growth differ scarcely at all from species of the preceding genus. It differs from the two fol¬ 
lowing genera, in having no intercellular septate spaces. Worn specimens of Limaria are 
scarcely distinguishable from Chaytetes or Favosites. 
Two species of this genus are recognized by Mr. Lonsdale in the Wenlock limestone of 
England, and we have three species in the Niagara group. 
531. 1. LIMARIA RAMULOSA (n. sp.). 
PL. XXXIX. Fig. 4a-d. 
Compare Limaria clathrata , Steininger, Mem. Soc. Geol. France, i, 339, t. 20, f. 6, 1834. 
— — Lonsdale, Sil. System, pag. 692, pi. 16 bis, fig. 7, 7 6, 1839. 
Coral ramose ; branches cylindrical or compressed, equally bifurcating or sometimes irregu¬ 
larly trichotomous; apertures of the cells sinuous, or subtriangular from wearing, closely 
arranged ; internal structure of stems prismatic. 
I have separated this species from L. clathrata , which it greatly resembles from the uniform 
close arrangement of the apertures of the cells, which are likewise less transversely elongated 
than in specimens from Dudley. A single fragment among several specimens from Dudley has 
the characters possessed by the Niagara species, but it is at the same time very different from 
the larger number of specimens from the same locality. Until we know to what degree these 
variations may extend, it seems more satisfactory to place the Niagara specimens under another 
designation. 
Fig. 4 a. A single bifurcating branch of this species, somewhat worn. 
Fig. 4 b. A fragment which is trichotomous. 
Fig. 4 c. The surface enlarged. 
Fig. 4 d. The end of a stem enlarged, showing the structure. 
Worn specimens of this species may be readily mistaken for some of the preceding or fol¬ 
lowing forms ; but by a careful examination, the apertures of the cells will always be found 
characteristic. 
Position and locality. In the lower part of the limestone at Lockport, Niagara county. 
