22 PALEONTOLOGY OF NEW YORK. 



cone of the larger specimens is generally rather straight, with the rings regular, 

 and no appearance of having been attached to any other body; but the young 

 specimens arc irregularly curved, have; more or less distorted rings, and are 

 lixed upon corals or shells. With such only does Schlotheim appear to have 

 been acquainted, and had not we been supplied with a complete series by Mr. 

 1>. Bright, we should have been induced to consider the full-grown specimen as 

 another species of the same curious genus."* 



" Locality. Western slopes of the Malvern Hills ; Dudley." 



In 1S72 Prof. Nicholson (Am. Jour. Sci., he. cit.) proposed the name Conchi- 

 colites, in the following terms: 



" Conchicolites, Nich. — Animal social, inhabiting a calcareous (?) tube, 

 attached in clustered masses to some solid body. The tube conical, slightly 

 curved, attached by its smaller extremity. The wall of the tube thin, its ex- 

 ternal surface devoid of longitudinal striae. The tube thin, composed of short 

 imbricated rings, but apparently destitute of any cellular structure. Cast of 

 the tube composed of short conical rings, its surface completely smooth, and 

 destitute of striae or furrows. 



" Conchicolites gregarius, Nich. — Tubes closely in contact, attached by their 

 -mailer ends to dead shells. Tubes varying in length from a quarter to half an 

 inch, and having a diameter at its mouth of about half a line." 



" The preceding species is found growing upon the shells of Orthocerata in 

 the Lower Silurian of the North of England. 



" The following described species are from the Lower Silurian in the neighbor- 

 hood of Cincinnati." 



In the Geological Magazine, vol. ix, 1872, Prof. Nicholson published a paper 

 on " Ortonia, a New Genus of Fossil Tubicolar Annelides." 



" The following diagnosis gives the characters of the genus Ortonia, and of 

 the single known species: 



"Ortonia, Nich. — Animal solitary inhabiting a calcareous tube, which is 

 attached along the whole of one side to some foreign body. Tube slightly 



* In the discussion of these forms in the Third Edition of Siluria, under the Wenlock series, page 259, 

 Mr. Salter gives the following interesting facts: 



" Cornulites serpularius (see pi. xvi, f. 3-10) is still, .-is in the Llandovery rocks, the principal annelide j 



and, tl gh more frequent in the Wenlock limestone, is net rare in the Ludlow rocks. The finest specimens 



from the Wenlock limestone of Ledbury; but at Dudley Cornulites are found attached to shells, in 



groups of thi r four together, like Serpulse, and they occur in profusion on the hard and seaworn surfaces 



nf Ludlow rock at Marloes Bay, in Pembrokeshire, in masses a foot in diameter." 



