FISTULIPOKID^E. 23 
become closely arranged as the surface is approached. At the surface the vesicles are 
replaced by a dense calcareous deposit, which gives the solid aspect to the maculae and inter 
zooecial spaces. 
Compared with Fistulipora lockportensis , which also has a laminate growth, F. laminata 
may be readily distinguished by its much smaller zooecia and strong lunaria. The other 
associated species of the genus differ so much in growth and other characters that they should 
not be confused. 
Occurrence. — Rather uncommon in the Rochester shale at Lockport and Rochester, N. Y., 
and at Grimsby, Ontario. 
Catalogue numbers, 35467, 35468, 35738, U. S. National Museum. 
Fistulipora tuberculosa (Hall). 
PI. VII, figs. 11-15; PI. VIII, figs. 7, 8; PI. XXIII, fig. 14. 
Rhinopora tuberculosa Hall, Nat. Hist. New York, Pal. II, 1852, p. 170, pi. 40E, figs. 4a-c. 
Rhinopora tuberculosa Grabau, Bull. New York State Mus., No. 45, 1901, p. 175, fig. 77. 
The type specimen of Rhinopora tuberculosa was found by the writer to be a somewhat 
crushed example of a Fistulipora, having a utricular method of growth and occurring in com- 
parative abundance in the shales. Other more perfect specimens show the following diag- 
nostic characters: 
Zoarium consisting of irregular hollow branches, with a wrinkled epitheca on the inside, 
averaging 5 mm. in diameter when not crushed; thickness of zoarium ranging from 0.5 to 
1.0 mm. Surface exhibiting at intervals averaging 3 mm. subsolid, slightly elevated monti- 
cules from which the zooecia radiate in distinct lines. Apertures small, elongate oval, 0.20 
mm. in their longer diameter and 0.10 mm. in the shorter, 7 to 8 in 2 mm. Lunarium very 
prominent and overarching more than one-half the aperture. Maculae and zocecial inter- 
spaces occupied by angular vesicles. 
The utricular form of growth, small zooecia, and prominent lunaria are characteristic of 
this species and cause it to be easily distinguished from associated forms of Fistulipora. 
Although the individual branches of this species are small, an entire zoarium is often of 
considerable size, one specimen in the collection of the United States National Museum being 
13 cm. high and 15 cm. in breadth. 
Occurrence. — Not uncommon at Lockport and other localities in western New York; 
Grimsby, Ontario. 
Catalogue numbers, 35486, 35487, U S. National Museum. 
Fistulipora lockportensis n. sp. 
PI. Vll, figs. 1-3. 
Zoarium forming irregular lumps made up of superposed layers 10 cm. in diameter, but 
more often consisting of epithecated laminar expansions 5 cm. wide and composed of layers 
each H to 3 cm. thick. Surface rough on account of the large zocecial apertures and exhibit- 
ing rather iiTegular and inconspicuous rounded monticules. The latter may be distin- 
guished most easily by the presence of maculae, from which the zocecia radiate. Zooecia in 
the immediate vicinity of the macula? slightly larger and with more prominent lunaria; 4 
zooecia in 2 mm. Apertures rounded and with a distinctly elevated peristome; the posterior 
half more elevated and forming the lunaria, which is usually inconspicuous and seldom 
indents the zocecial cavity. Maculae and interzooecial spaces occupied as usual in the genus 
by vesicles. Diaphragms usually wanting in the zocecial tubes, although occasionally a few 
thin delicate ones may be developed. 
The laminar or irregular growth, laige zooecia, and inconspicuous lunaria are particularly 
characteristic of this species. The associated F. laminata also has an explanate method of 
growth, but its much smaller zooecia and well-developed lunaria will serve as a ready means of 
distinction. 
Occurrence. — Not uncommon at Lockport and Rochester, N. Y. 
Catalogue numbers, 35488, 35489, U. S. National Museum. 
