Rev. T. R. R. Stehbing — OnCalceola sandalina. 57 



curved like the letter S ; and sometimes the smaller extremity is 

 twisted into a flat spiral. I can detect no longitudinal striation, but 

 the tube is covered with very numerous transverse ridges (at least 

 150 in the space of an inch), which are generally better marked on 

 the sides than on the back of the tube. la very small, presumably 

 young, specimens I have been unable to determine the existence 

 of these ridges, and even in fully-grown example s they are more 

 strongly marked in some than in others. The tube is always attached 

 along its whole length, and in no case is any portion free, as is the 

 case in Conchicolites. 



Loc. and Form. — Common in the Hudson Eiver Group (Lower 

 Silurian) of Cincinnati, Ohio, attached to the exterior of Brachiopods 

 and Corals. 



In conclusion, I may mention here some singular fossils from the 

 same locality and formation as the preceding, which have been 

 kindly submitted to me by Mr. U. P. James, of Cincinnati, but the 

 true nature of which seems uncertain. The fossils in question were 

 originally named by Mr. James Tentaculites ininuta (MS.), and they 

 certainly present some resemblances to this genus. They consist of 

 minute, conical, flexuous, or curved tubes, about -yV ^i^ch in length, 

 opening by a circular aperture at their widest extremity, and having 

 their surface wrinkled with irregular rings or annulations. In all 

 their essential characters these tubes seem to agree with Ortonia 

 minor ; but they differ in the very important point that they are not 

 attached to any foreign body, but, on the contrary, are perfectly free. 

 I do not think they can possibly be referred to Tentaculites, since 

 they are flexuous or in some cases irregularly curved, while they are 

 destitute of the strong and regular annulations of the typical species 

 of this genus. Nor can they be referred to Ortonia, unless we 

 believe that their occurrence in a free state is an accidental circum- 

 stance, due to their having become detached from the body on which 

 they grew, prior to fossilization. This is a possible explanation, 

 though an unlikely one. At present I am inclined to believe that 

 we have here a Tubicolar Annelide, which, like Bitrupa, was free 

 in habit ; but I shall delay naming and describing these remarkable 

 fossils until I may be provided with more ample materials. 



Explanation of Plate IV. Figs. 2 and 3. 

 Fio. 2.— a, A group of the tubes of Conchicolites eorrugatus, growing upon Fleiiro- 



tomnria bilix, natural size. — 6, A single tube of the same, enlarged. 

 Fia. 3. — a. Tubes of Ortonia minor, Nich., growing npon a Strophomena, natural size. 



— b, One of the tubes enlarged. 



III. — Notes on Calceola sandalina, Lamakck. 



By the Eev. T. R. R. Stebbing, M.A. 



(PLATE V.) 



Calceola sandalina, both by its generic and specific name, means 



a little shoe or slipper. It is a common fossil in the Devonian rocks 



of the Eifel and other continental localities, and was found years 



ago by Mr. Godwin-Austen at Ogwell, near Chircombe Bridge, in 



Devonshire. Cuvier is said to have classed it with the Oysters, thus 



