+ “ 
290 PROCEEDINGS OF THE NATIONAL MUSEUM. ~ vou. xxxty. 
as they rise from the rim of the cloaca, and probably shghtly curving 
in the process. This arrangement is regular and tends to produce 
radiating pores from the cloaca to the periphery. Canals or cham- 
bers, properly speaking, appear to be absent. What look hke vermi- 
form canals are probably mere color markings, which wind among 
the spicules without interrupting them. These radiating pores pro- 
duce upon the outer surface small, more or less circular openings, but 
ostia, strictly speaking, are probably absent. Certain larger openings 
appear to be superficial and to be produced by the absence of a spicu- 
lar arm, such as in other instances serves to separate adjacent pores. 
Locality and horizon.—Allen limestone; cut on the Santa Fe Rail- 
road, 5 miles southwest of Chanute, Kansas. 
Type-specimens.—Cat. No. 58472, U.S.N.M. 
HELIOSPONGIA RAMOSA, var. PARALLELA, new variety. 
LENGE SOWIE, inks, TO, IP lene SOWIUOL 
This form seems to agree in all respects with the foregoing except 
in the mode of growth, the typical one bifurcating freely while the 
present variety appears to have a principal stem which gives off long, 
parallel branches. 
Locality and horizon.—Allen limestone; cut on the Santa Fe Rail- 
road, 6 miles southwest of Chanute, Kansas. 
Ty pe-specimen.—Cat. No. 53473, U.S.N.M. 
MYALINA WYOMINGENSIS Lea. 
ate Re NGIEXe a Sears 
1853. Modiola wyomingensis Lea, Acad. Nat. Sci. Philadelphia, Jour., (2), 
10, 1 AH, joll, SOx, 1S, IG, 
1853. Modiola minor Lea, Acad. Nat. Sci. Philadelphia, Jour., (2), II, p. 
POS, Ol, SOx, ithe, 2, 
1886. Modiola wyomingensis CLAYPOLE, Wyoming Hist. and Geol. Soce., 
IPOS, hovel Croll, 10h 1h 2, jo, BL, 
1898. MWyalina wyomingensis WELLER, U. S. Geol. Sury., Bull. 158, p. 565. 
1903. Myalina wyomingensis Girty, U. S. Geol. Survey, Prof. Paper 16, 
p. 422, pl. vin, figs. 8-138. 
“Testa levi triangulari, inferne compresso-alata; umbonibus 
elevatis, acute angulatis. 
“Remarks.—This is a broad flat species, very different from the 
minor, which is on the same specimen. These are parts of four 
distinct specimens on this small piece of slate; which is represented 
of the natural size.” | | 3 
Lea’s description and remarks are given above. Part of the inclos- 
ing rock having been removed the type-specimen proves to have the: 
following characters: 
Shell of medium size, subtriangular. Hinge but slightly shorter 
than the extreme width. Length and maximum width about equal. 
Umbonal ridge prominent, sigmoid, rounded sharply above, more 
