DESCEIPTIONS OF SPECIES. 273 



locality on the east side of the Animas Eiver, then called Durango 286, but now cited 

 as station 2388, can be referred with little doubt to the species just described as 

 Menophyllum ulr'icharnmi . 



The brief description accompanying the title Streptelasma sp. , while based mainly 

 upon the coral belonging to Menophyllum ulrichanum, unfortunately includes char- 

 acters possessed by both species, and as a whole it will apply to neither. The only 

 feature recorded from the Devonian form is that of the septa meeting in the center 

 and being twisted. The other form possesses the characters of 31. ulriclianunn as 

 cited above. The number of septa is greater than in the specimen figured on PL I, 

 but it is not greater than in other characteristic examples. The number cited in the 

 earlier reference is from 60 to 64, and there is an almost equal number of secondary 

 septa. 



The Devonian species is a larger and more slender form with perhaps 34 septa 

 which are differently arranged from those of 3L ulrichanum. Dissepimental tissue 

 and tabulfe are developed in moderate degree. This form would, I believe, better be 

 placed with Zaphrentis. 



Locality and horisoti.— San Juan region (stations 2379, 2382, 2384, 2386, 2388); 

 Ouray limestone. 



SYRINGOPORA Goldfuss, 1826. 

 Sykingopora acxileata Girty. 



1899. Syringopora aculeaia. Girty, V. S. Geo). Surv., Mon., vol. 32, pt. 2, p. .509, pi. 67, flgs. 5o, 5/*. 

 Madison limestone: Yellowstone National Park. 



The material presented does not retain its structures for satisfactoiy study, but 

 in the size of the corallities, mode of growth, and such few characters as are avail- 

 able, the fossils from Colorado agree with the types. 



Locality and horizon. — Crested Butte distinct (station 2359); Leadville lime- 

 .stone. Aspen district (station 2363); Leadville limestone. Salida region (station 

 2260); Leadville limestone. 



Stringopoea surcularia Girty. 



1899. Syringopora mreidaria. Girty, U. S. Geol. Surv., Mon., vol. .32, pt. 2, p. .510, pi. 67, tigs. 4a, ih. 

 Madison limestone: Yellowstone National Park. 



Several large fragments of this form were collected at Salida (station 2358) and 

 a small one at Crested Butte (station 2360). The structures in both cases are poorly 

 preserved, but the specimens probably belong to the species cited above. 



A specimen from the Rico region (station 2381) referred to S. surcularia occurs 

 as external casts in chert. The corallites have a diameter of about 2.5 mm., and 

 much resemble those of S. surcularia, but of course, strictly speaking, they are 

 14364— No. 16—03 18 



