738 MESSES. E. HEEON-ALLEN AND A. EAELAXD ON THE 



11 Stations. 



Generally distributed, but never abundant except at Stn. 1, and entirely absent at 

 some Stns. The specimens at each Stn., though often limited in number, generally 

 present the two typical varieties, viz. the compressed and the lenticular forms, 

 and both smooth and granulose. Perhaps the commoner and most widely distri- 

 buted form is a small megalospheric and compressed variety usually with a sub- 

 granulose exterior. At Stn. 1 the species was found in varieties ranging from small 

 thin complanate smooth tests to large lenticular forms, both smooth and highly 

 granulose. At Stn. 2 all the specimens were of small to medium size, and all com- 

 planate. At Stn. 3 the large forms were all of the lenticular type and smooth, the 

 thin type smaller and granulose. At Stn. 4 all the specimens were small and 

 compressed. At Stn. 6 both compressed and lenticular, but only the compressed were 

 granulose. At Stn. 9 the specimens were large, and both compressed and lenticular, 

 granulose and smooth. The same variations are to be found throughout the 

 gatherings. 



462. Operculilia granillosa Leymerie. 



Operculina granulosa Leymerie, 18-1.6, NC. p. 359, pi. xiii. fig. 12. 



„ complavata, var. granulosa Brady, 1884, FC. p. 743, pi. cxii. figs. 6, 7, 9, 10. 



„ granulosa Eg-er, 1893, FG. p. 435, pi. xx. figs. 36, 37, 43. 



Chapitiiin, 1895, FAS. p. 48. 

 „ complanata, var. granulosa Millett, 1898, etc., FM. 1904, p. 606. 



3 Stations. 



We have dealt with the specimens referable to this species under 0. complanata. 



Hetekostegina d'Orbigny. 



463. Heterostegina depressa d'Orbigny. 



Heterostegina depressa d'Orbigny, 1826, TMC. p. 305, pi. xvii. figs. 5-7, Modele uo. 99. 

 aidillarmn d'Orbigny, 1839, FC. p. 122, pi. vii. figs. 24, 25. 

 depressa Brady, 1884, FC. p. 746, pi. cxii. figs. 14-20. 



Egger, 1893, p. 433, pi. xx. figs. 34, 35. 



Chapman, 1899, FTA. p. 18, pi. iii. figs. 6, 7 



Chapman, 1900, FLP. p. 205. 



Lister, 1903, P. p. 128, fig. 56. 



Dakiii, 1906, FC. p. 241, pi. — . fig. 14. 



4 Stations. 



Occurs only at Stns. 2 a, 4, 6, and 11. At Stn. 4 only minute specimens were seen ; 

 at Stn. 11 it was moderately frequent and well developed in the coarse siftings, many 

 of the larger specimens being coloured green owing to the presence of symbiotic algte 

 in the protoplasmic body. The comparative rarity of this typical tropical shallow- ■ 

 water form in the Kerimba material is noteworthy. 



