Mr. F. M'Coy on three new Devonian Zoophytes. 377 



XXXIII. — Descriptions of three new Devonian Zoophytes. By 

 Frederick M'Coy, Professor of Geology and Mineralogy in 

 Queen^s College, Belfast. 



Stromatopora (Caunopora) verticillata (M'Coy). 



Sp. Char. Corallum forming slender, cylindrical, vermiform 

 branches 1 or 2 lines in diameter, each with a distinct central 

 canal one-fourth to one-third of a line in diameter ; surround- 

 ing sclerenchyme nearly solid, traversed by verticillate whorls of 

 simple, nearly sti*aight canals, averaging about one-third the 

 diameter of the central canal in most of their length, extend- 

 ing obliquely upwards and outwards from the inner channel 

 (whose walls they perforate with regular, rounded, quincun- 

 cially arranged openings) to the surface, where they form 

 slightly elongate quincuncially arranged pores, four in the 

 space of 1 line, separated by solid interspaces thicker than their 

 diameter. 



This species by its narrow cylindrical branches and distinct 

 central channel resembles the C. ramosa (Brassart sp.), but in- 

 stead of having a minute vermicular subequal reticulated struc- 

 ture, as in that species, the general structure is neai'ly solid, and 

 regularly traversed from the centre to the surface by large, ob- 

 lique, nearly straight verticillate canaliculi, giving a plumose 

 appearance to the longitudinal section. 



Not uncommon in some parts of the Devonian limestone of 

 Teignmouth. 



{Col, University of Cambridge.) 



Alveolites vermicularis (M'Coy). 



Sp. Char. Corallum forming polymorphous masses of obscurely 

 defined concentric layers, of short, irregularly and obtusely 

 polygonal, vermicular, tlexuous tubuli, traversed by regular 

 horizontal diaphragms slightly more or less than the diameter 

 of the tubes apart ; cavity of the tubes in vertical and hori- 

 zontal sections separated by at least their diameter of scleren- 

 chyme ; about six tubes in the space of 1 line. 



I believe this species has been confounded with the very di- 

 stinct Favosites {Alveolites) spongites of the Eifel, in which how- 

 ever the tubes are half a line in diameter (only two openings in 

 the space of 1 line) ; and m which they are also straight instead 

 of vermicular or minutely flexuous, and have the sclerenchyme 

 much thinner in proportion to the size of the tubes, presenting 

 all the characters (as I tind from examination of authentic spe- 

 cimens) represented with great tidelity inGoldfuss's figures, t. 28. 



Ann. 6) Mag. N. Hist. Ser. 2. Vol. vi. 25 



