176 



NEW YORK STATE MUSEUM 



Serpula? infinitesima nov. 



Minute, highly contorted, anastomosing tubes which, when highly 

 magnified in cross light, are nodose in appearance owing to rapid 



contractions and expansions of the shell. 

 Diameter of tubes .i mm, attached throughout 

 their length to the shell of Composita 

 dawsoni (Hall and Clarke) and other 

 species of brachiopods. 



Remarks. This species appears, on other 

 shells, to live quite as largely within the shell 

 as upon it. When it appears at the surface 

 it has the characters mentioned above. It 

 may be straighter within the shell than when 

 partially at the surface. It seems to be par- 

 tial to the shells of M a r t i n i a glabra. 

 It is probable that it is not a Serpula at all 

 Several shells of the collection show the 

 effects of this borer though the tests it 

 secretes are gone. 



Serpula infinitesima 

 nov. 



Showing (above) the nodose 

 and contorted form (x lo) 

 and below the tube partly 

 buried in the shell (7) 



Cornulites? annulatus Dawson? 

 Cf. S e r p u 1 i t e s annulatus Dawson, op. 



cit. p. 313, fig- 131- 

 Specimens much smaller than Dawson's and 

 with coarser marks, otherwise typical. 



Cornulites? annula- 

 tus Dawson ? 

 Oyster basin, Coffin I. 



Stenopora? sp. 



An immature specimen of the S. s i g n a t a type, or what seems 

 as probable, a form of Lioclema with relatively few meso pores. 

 Encrusting form upon Composita dawsoni (H. and C.) 



Specimens small, encrusting; zoecia varying from elongate where 

 crowded to ovate; acanthopores rather numerous, elevated, larg- 

 est ones at the angles of the zoecia; mesopores rather numerous, 

 about eight being found in the walls surrounding a single cell, some 

 much larger than others, except at zoecial angles, never in two rows, 

 triangular to subcircular. Five zoecia in 2 mm. Interspaces fairly 



thick. 



One other specimen still smaller than this was found. 



