DESCRIPTIVE CATALOGUE OF RECENT FORAMINIFERA. 289 



CLAVULINA EOC^NA Giimbel. 

 (Plate 35, fig. 1.) 



Cylindrical or slightly tapering; triserial portion very sliort; nodo- 

 sarian segments usually three or four in number, clearly defined by 

 depressed sutures; walls coarsely arenaceous, rough; chambers par- 

 tially divided by a network of incomplete septa springing from the 

 outer wall; aperture a simple rounded orifice in a central slight depres- 

 sion at the end of the final segment. Section shows the apparent 

 thickness of the walls due to the cancellar structure, and the form of 

 the chambers. Length, about 1.5 mm. {-^^ inch). 



Locality. — Gulf of Mexico (station 2377), 210 fathoms. 



CLAVULINA PARISIENSIS d'Orbigny. 

 (Plate 35, fig. 2.) 



The distinguishing characteristic of this sirecies is the triangular 

 contour of the triserial portion of the test; otherwise it strongly resem- 

 bles C. communis. It is somewhat coarser and rougher than the latter, 

 and near the oral end the sutures are often much dejiressed. 



Locality.— GuU of Mexico (stations 2315, 2377, 2385, 2400), 37 to 730 

 fathoms. 



A variety collected near Key West, Florida, has a very rough test 

 constructed of coral sand. (Plate 35, fig. 3.) 



CLAVULINA PARISIENSIS, variety HUMILIS Brady. 

 (Plate 36, fig. 1.) 



The variation consists in its smaller size, rougher exterior, the deep 

 depression of the sutures, often forming a distinct neck between the 

 two last segments, and the aperture borne at the eud of a long tubular 

 prolongation of the final segment. 



Localities. — Gulf of Mexico, and oft" the coast of Brazil (stations 

 2377, 2399, 2100, 2762), 59 to 210 fathoms. 



CLAVULINA ANGULARIS d'Orbigny. 



(Platte .SO, fig. 2.) 



Arrangement of segments as in other species of Glavulina, triserial 

 at first, then uniserial and rectilinear. Differs from the other species 

 in the triangular contour of transverse section of the uniserial as well 

 as the triserial portion of the test; aperture a central arched slit with 

 a protruding lower lii). 



Locality. — Straits of Yucatan (station 2358), 222 tathoms. 



Sialaltiinily BXJLIM:ININ^E. 



Typically spiral ; weaker forms more or less regularly biserial ; aper- 

 ture oblique, comma-shaped or some modification of that form. 

 NAT MUS 97 19 



