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barrel-shaped polyps apparently arranged in three to four rows. This appearance 

 is due no doubt to the twisting of the pinnule and the greater development of the 

 polyps. The well-developed pinnules are 2'5 mm. in height and separated by 

 about 2 mm. They overlap on the meta-rachidial surface, but leave a bare space, 

 marked by a deep longitudinal furrow, on the pro-rachidial aspect. No definite 

 zooids nor hint of nutritive canals was visible. 



The coenenchyma is thin, but the outer covering is tough and has a tessellated 

 appearance. At the base of the rachis there is small elongated swelling with a 

 very thick wall, but part of this region is also marked by diminutive pinnules. 



The axis is cylindrical and smooth, with a brownish exterior and a white 

 calcareous cone. No trace of limy bodies was found in the stalk or bladder. 



This species approaches V. rumphii, but is distinguished from it by the 

 large number of polyps, the absence of spicules, and several other features. 



Locality : Andamans. Marine Survey. 



Virgularia, sp. ? 



Two young colonies which we have hesitation in placing in any species. 

 They are immature and show the gradual development of the pinnules. In 

 details they are different and neither agrees with any described species. 



(A) The larger is 46 mm. in length and bears twenty-three pinnules seen 

 as distinct with the naked eye. The pinnules are separated by about 1 75 mm. 

 They are placed obliquely, the pro-rachidial insertion being considerably higher 

 than the meta-rachidial, and about the level of the meta-rachidial insertion of 

 the next higher pinnule. There are from four to six polyps on each pinnule, 

 quite distinct from one another. The pinnules meet and overlap on the meta- 

 rachidial surface. All stages of rudimentary pinnules down to minute points 

 are present. The axis is cylindrical and tapers to a point at each end. 



(B) The other is 35 mm. in length, and bears twelve distinct pinnules on 

 each side. All stages of rudimentary pinnules are present. The meta-rachidial 

 and pro-rachidial insertions are about the same level. The pinnules are small 

 and overlap on the meta-rachidial surface. The polyps, which are six to eight 

 in number, are distinct and leave only a narrow strip at the base of the pinnule. 

 The axis is cylindrical and tapers to both ends. There is a small swelling at 

 the end of the stalk. 



Locality : Andamans, Marine Survey, 15 fathoms. 



GENUS SCYTALIUM, Herklots. 

 Scytalium martensii, Kolliker. Plate V. figs. 1 and 5. 



Several portions of what is apparently one colony about 600 mm. in 

 length, also portions of another smaller colony, agree closely with Kolliker's 



