326 DISCOVERY REPORTS 



58. Dendrophrya erecta, Strethill Wright (Plate VII, fig. 9). 

 Deridiophryaerecta, Strethill Wright, i86i,^««. Mag. Nat. Hist.{T,),\m, p. 122, pi. iv, figs. 4, 5. 

 Dendrophrya erecta, Brady, 1884, FC, p. 239, pi. xxvii a, figs. 7-9. 



One station: WS 221. 



A single excellent specimen attached to a Pecten shell. It is quite possible that the 

 species is widely distributed, but hitherto the only records are from shallow water 

 round the British coasts. 



Genus Dendronina, Heron-Allen and Earland, 1922 



59. Dendronina papillata (Heron-Allen and Earland) (Plate XVI, figs. 33-38 and 

 Plate XVII, figs. 1-3). 



Diffusilina papillata, Heron-Allen and Earland, 1929, etc., FSA, 1929, p. 324, pi. i, figs. 4-6. 

 Six stations: WS 213, 221, 225, 242, 243, 245. 



"Test attached to stones and other objects, generally roughly circular in outline, 

 though the edges are frequently produced into irregular cusps. In form, more or less 

 convex, built up of finely comminuted sand and mud, firmly compacted but without 

 much cement, except in the outer layer which is very smooth, even polished, but with 

 one or more well-marked, projecting papillae, formed of the same minute sand grains 

 more loosely agglutinated. These papillae presumably form the avenues for the extru- 

 sion of the protoplasm, which, however, may perhaps also find an exit round the edges 

 of the test, although these appear to be in close contact with the surface of attachment. 

 Colour varying from dirty white to grey. 



"Specimens broken open reveal a simple cavity with lobular extensions — in fact 

 amoeboid in shape — filled with pale brown protoplasm. Larger sand grains are used in 

 the construction of the interior, than of the outer layer of the wall. No passages con- 

 necting the central cavity with the papillae or the edges can be made out. Probably the 

 protoplasm exudes in a fluid form between the sand grains, and digestion is carried on 

 outside the test. The size varies up to about 2 mm. in diameter." 



The foregoing extract from the original description of the species still holds good on 

 the whole, but a much larger supply of material has demonstrated that the specimens 

 originally described were young individuals constituting the first stage of a larger 

 organism which can no longer be retained in the genus Diffusilina, but must be removed 

 to Dendrouiuo, a genus originally described by us from New Zealand and the Ross Sea in 

 the Antarctic (H.-A. & E. 1922, TN, p. 78 et seq.). It was then suggested that the genus 

 might prove to have a wide distribution. 



Following on the early growth described above, the second stage consists in the 

 prolongation of the central nipple into a short, stout, tubular outgrowth, furnished at its 

 extremity with a constricted circular opening. The same fine material is employed. The 

 walls of the tube are thin and the central cavity large, and the tube is apparently super- 

 imposed on the original papilla, forming a separate chamber of which the top of the 

 papilla forms the base. Its height may be 2-00 mm. or more. 



In the third and final stage the tube expands and forms an irregular body, either 



