NOTES ON RETICULARIAN RHIZOPODA. 61 



symmetry of form, their thin walls, and smooth, almost 

 homogeneous, tests. 



H. glohulifera is essentially a deep-water Foraminifer. Out 

 of eight localities in which I have notes of its occurrence, 

 six are at depths of more than 1000 fathoms, and three of 

 these at more than 2000 fathoms. Its distribution appears 

 to be world wide, the " Challenger^' collections furnishing 

 specimens from both the North and South Atlantic and the 

 North and South Pacific Oceans. 



HORMOSINA OVICULA, U. Sp. PI. IV, fig. 6. 



Characters. — Test long and very slender, tapering; com- 

 posed of several fusiform segments joined end to end, without 

 overlapping, in straight or slightly curved linear series. 

 Walls thin, texture very finely arenaceous. Colour yellowish 

 brown, with a band of somewhat darker hue encircling the 

 narrowest part of the stoloniferous tubes. Length, ^ inch 

 (5 millim.). 



A very delicate fragile little organism and one seldom found 

 entire. Hormosina ovicula stands in much the same relation 

 to H. glohulifera that Nodosaria pyrula does to N. radicula ; 

 that is to say, its segments are produced at the two ends and 

 are joined by their narrow extremities, instead of the suc- 

 cessive lobes being sessile and more or less embracing. 

 The deepening of the brown colour in portions of the test, 

 which has been noticed in connection with other species, 

 shews itself in the present instance in the little ring sur- 

 rounding the stoloniferous tubes at their narrowest point. 

 Each of these points having been of course, in its turn, the 

 pseudopodial aperture of the shell. 



Hormosina ovicula is, to even a greater degree than its 

 congener, H. glohulifera, a deep-water species. Specimens 

 have been met with in six of the " Challenger'' dredgings, 

 which represent depths ranging from 1900 to 2600 fathoms, 

 and I have no note of its occurrence in shallower water. Of 

 these, two were dredgings from the South Atlantic, two from 

 points lying to the South of Australia, and two from the 

 North Pacific. 



