ANIMALS. 29 
interspaces ; the margin of its tube-apertures is more crowded with tubercles; and the 
apertures of both the full-grown and interpolated tubes have a more regular arrange- 
ment. I have not succeeded in discovering either surface or mural foramina; but I 
am not without a suspicion that they will yet be found. 
Were I certain that this species possessed transverse plates, there would have been 
nothing of any weight remaining to prevent its being placed in the last genus; but 
having failed in discovering them, and looking to the simple character of its tubes, 
and its interpolated reproduction, I have been led to put it in Stenopora, though not 
without some doubt as to the propriety of the collocation: on the other hand, the 
pullulation of new tubes on the outside of the old ones (vide Plate III, fig. 8) opposes 
its being associated generically with the next species. 
Although an incrusting Coral, I have a specimen of Stenopora columnaris coating 
some encrinal internodes, with a branch, apparently springing from its surface, and 
growing round an imaginary axis; but perhaps the case in point is nothing more than 
a Calamopora Mackrothiu attached to the surface of a Stenopora columnaris. 
This species is generally found covering fragments of the columns of Cyathocrinus 
ramosus, and filling up the cavities of shells. Schlotheim’s figure, quoted in the list of 
synonyms, exhibits it under the former aspect. A specimen in my possession has 
erown on the large valve of a Productus horridus, which is similar to what Geinitz 
represents of a German Coral, herein doubtfully referred to the same species. I have 
seen other specimens incrusting the stems of Zhamniscus dubius. 
Except that it has wider interstitial spaces, and more interpolated tubes, Stexopora 
columnaris might be taken for De Koninck’s Alveolites irregularis. 
It occurs at Humbleton, Tunstall Hill, and Whitley; but is nowhere a common 
species. Geinitz’s dlveolites producti, which may be the same Coral, is found at 
Corbusen, in Saxony. 
Genus Alveolites, Lamarck, 1801. 
Diagnosis.—* Polyparium lapideum, vel incrustans, vel in massam liberam, ¢ 
tubulis plurimis concentricis invicem sese involventibus compositum. Tubule ex 
cellulis tubulosis, alveolatis, prismaticis, breviusculis, contiguis et parallelis formate, 
extus reticulatim concatenate.” (Lamarck.) 
The tubes or cells of Alveolites are short, parallel, contiguous to each other, and 
of a prismatic shape, forming layers enveloping each other, and constituting 
elongated, sub-globular, hemispherical masses of varying sizes. Looking at the 
shortness of the tubes, Lamarck was induced to conclude that their polyp tenants had 
the body less elongated than those inhabiting the Tubipores or Music-corals.” 
1 Animaux sans Vertébres, vol. ii, p. 285, 2d ed. 
2 Idem, p. 286. 
