NJGS - Bulletin 61-I. The Cretaceous Fossils of NJ - State of New ...

30 CRETACEOUS FOSSILS
differs from C. cretacica, the common species in New Jersey, in having
the tubercles on the surface of the fillings of the excavations. These do
not occur on the surfaces of the fillings of C. cretacica.
Range inNew Jersey-
NAVESINK : 53
Type.-Navarro formation, Tesas; USNM 76266
Cliona retiformis Stephenson 1953
Plate 45, Figure 1.
Cliona retiforntis, Stephenson, 1953, U. S. Geol. Surv. Prof. Paper 242,
p. .50, pl. 8, figs. 1-3.
Clionn retifor-ntis, Stephenson, 1954, TI. S. Geol. Surv. Prof. Paper
264-B, p. 27, pl. 6, fig. 1.
Ferruginous internal molds of the burro\i,s of a sponge that is prob-
ably referable to this species, ~vliich was originally described from the
Woodbine formation of Tesas, have been found on the internal mold
of a shell of Ostrea soleniscas hleek, and on the imprint of a fragment
of a thick unidentified shell, from the Raritan Formation.
Young individuals of this hurro\ving sponge entered the shells of
mollusks through circular openings of their own making that ranged
in diameter from 0.1 mm. or less to ahont 0.5 mm. Once inside the shell,
the sponge bored laterally, often meeting and joining its borrolvs with
those of other sponges of the same species to form a netmork of borron,~.
These burrows are extremely irregnlar in form and directions, ranging
from small to relatively large in size, and being expanded at intervals
into irregular ovate or jug-shaped cavities. This network of burrows
may form an open lacework of lahyrint,hine passages or a dense mesh
of burrows and turnip-shaped intereomnnieating cavities. The fossils
of this species are usually composed of the fillings of the burrows, the
outer surfaeesof the fillings being molds of the walls of the burrows. The
outer snrfaees of these molds are finely stippled.
Range in New Jersey-
RARITAN: (Woodhridge member) : 1
Ra71ge mitside New Jersey-
Texas (Woodbine formation)
Type.-Near Euless, Terrant County, Texas. UShTM. 105068;
Plesiotype-Sayreville, N. J.; USNRl 108611, 108612.
Family Coeloptychiidae
Coeloptychiurn ? jerseyensis Shimer & Powers 1914
Plate 2, Figures 4, 5.
Coolopl?/chi?cn~ I jerseyensi~, Shimer & l'owers, 1914, Proe. U. S. Nat.
Museum, vol. 46, p. 155-156, p1.7.
Description.-hfushroomlike, contracting from a broad and depressed
upper surface into a short stalk. Edge of disk rounded. Entire
NEW JERSEY GEOLOGICAL SURVEY