,. CHAZY LIMESTONE. 17 



22. 2. STICTOPORA GLOMERATA (n. 5yj.). 



Pl. IV. Fig. .5. 



The specimen consists of a surface several inches square, covered and crowded with this 

 coral, denuded completely of its colluliferoiis crust. Its appearance is very similar to the 

 specimen fig. 4 e, though its mode of growtli is considerahly dilferent ; and principally from 

 this circumstance, as well as from the impossibility of defining the external characters of 

 the coral, I have referred it, with some hesitation, to a distinct species. 



Position and locality. Granville ( Vermont), in a limestone, associated with Maclurea 

 magna, which I have elsewhere shown to be identical with that of Cliazy. 



Genus STREPTOPLASMA ( Fam. Cyathophyllidea ) . 

 [ Greek, iTTpe-irTos, twisted, and irXarfiAa, lamells.] 



Turbinate, gradually or abruptly expanding above; form like Cyathophyllum ; terminal 

 cup more or less deep ; lamelhe vertical or longitudinal, more or less spirally twisted 

 together when meeting in the centre. 



There is some objection to the application of the term Stromhodes of Sciiweigger to 

 fossils of this character, or those formerly grouped with CyAXHopHVLLiF., as the genus was 

 constituted for a diflferent coral. To indicate the prominent character, I have proposed this 

 name as applicable to a considerable number of palaeozoic species. 



23. 1. STREPTOPLASMA EXPANSA («. .fp.). 



Pl. IV. Figs. G a, b. 



Turbinate, short, expanding above ; terminal cup deep ; lamelhe fine, numerous. 



This species presents some variety of form and aspect, l)ut its essential characters are a 

 short broad turbinate form, with a deep cell. It is imbedded in the crystalline encrinital 

 limestone, and being itself usually in a crystalline state, it appears like the pelvis of a 

 crinoidean. From this crystalline condition, nothing satisfactory can usually be learned 

 respecting its structure. 



Position and locality. This species is apparently confined to the lower part of the Chazy 

 limestone, not having been noticed above the position of the Maclurea magna. It abounds 

 at Chazy, to the west and southwest of the village. (State Collection.) 



[Paleontology.] 3 



