those near the margin are ninch larger than those in the interioi-, but they 

 eventually taper and unite with the more central canals. 



The polyi)s occur all over the l)asal plate and lobes and are very regularly 

 arranged so that the ccenenchyma forms a sort of reticulate structure. The 

 openings are circular but sometimes appear as small octagons when magnified. 

 The anthocodite are completely retractile. They withdraw themselves until 

 they are within the surface of the ccenenchyma where they appear as octagonal 

 figures formed by the inturning of the tentacles. The regular network which 

 separates the polyps does not contract so as to cover the anthocodia-. The i)olyp 

 openings are about 1 nuu. in diameter and the walls about 0'5 mm. in 

 diameter. They are arranged somewhat regularly in rows which in most cases 

 alternate. 



Locality : Gt. Coco Island, Andamans. 



GENUS SARCOPHYTUM, Lesson. 

 Sarcophytum plicatum, Schenk. 



To this species we refer two colonies, one very large and much convoluted, 

 the other small, mushroom-shaped and regular. The larger is attached to a 

 calcareous nuUipore and has a basal attachment 50 mm. long and 20 mm. in 

 maximum breadth. The whole colony is about 40 mm. in height and has been 

 })rimarily reniform, but by secondary convolutions this scheme is partly obliter- 

 ated ; the margin is verj^ irregular. The texture is "leathery" or may even 

 appi'oach to "hard". The ccenenchymal canals are circular and very definite 

 throughout the colony. 



The autozooids are fairly large and distant but are much more crowded 

 towards the periphery and on the marginal convexity ; they give the colony a 

 downy appearance when exserted. Eight or nine occur in 1 cm. in rather 

 definite rows ; the openings appear as small pores when the anthocodije are 

 retracted. The siphonozooids are hardly perceptible. 



The smaller colony is mushroom-shaped and has a sterile stalk 13 mm. 

 long and 12 mm. in diameter ; this is surmounted by an expanded disc about 

 24 mm. in diameter. The thickness of the central part of the capitulum is 

 about 5 mm. but it tends to become wedge-shaped towards the margin. Con- 

 volutions are still absent. In this specimen the autozooids are larger and 

 the pores more distinct ; the latter are about 1 mm. in diameter. The siphono- 

 zooids appear to the naked eye as dark minute dots. 



The colour of the larger colony is purplish, that of the smaller brown. 



This species is described in detail by Schenk (189G), p. 76, Tafel II. fig. 12, 

 Tafel IV. fig. 40. 



Locality : Mergui and Andamans. 



Previously recorded from Ternate. 



