GONIOPORA. 155 



differentiated, and here and there with traces of paliform knobs. A directive keel, running 

 right across the calicles, often in the line of growth, seems to have been fairly common. 



Dr. Gregory describes tliis coral as having in some calicles the 6 pali typical of Goniopora, 

 and correctly refers them to the points of fusion of the septa (see diagram A, p. 21). As we 

 have already learnt to expect (see p. 146), the pali are not very prominent in forms with large 

 gaping calicles and pronounced reticular columellar tangles. 



What appears to me to be of the greatest interest is the fact that the septa appear 

 frequently to run over the walls from calicle to calicle, as indicated in Dr. Gregory's figure 

 (1. c. PI. II. 13). This character has, so far, only been recorded once, and then on what 

 appears to be an abnormal patch on the single specimen of G. Celebes 1. It is shown in 

 the enlarged photograph, PI. IX. fig. 3. 



If the calicles there shown were filled up with some matrix, and the columellar tangle 

 not larger, but a little more compact, it would, I think, give a very fair impression of the 

 calicles of this Somaldand form. 



There are four specimens. One appears to be part of a thicker stem, and the rest are 

 small shapeless angular lumps, which were probably parts of branchlets. They are too altered 

 now to give us any idea of their original shapes. 



a-(l. Geol. Dept. E. 4838. 



Anotlier specimen described in the same paper by Dr. Gregory as Litharcea mice, also 

 from Somaliland, is certainly a perforate coral, but it is difficult to say, without more 

 specimens, to what genus it should be assigned. Not only has it none of the better-known 

 characters of Goniopora but it appears to have lost all trace of radial symmetry. Until a 

 series is found, such as helped us to assign the place to G. Red Sea 4-, it is wiser to suspend 

 judgment. On account, however, of Dr. Gregory's claim that it belongs to this family, I 

 propose to have it photographed for Vol. V., for, if a Poritid, it seems to me to have more claims 

 to belong to Poritcs than to Goniopora. 



Group XIII.— WEST INDIES. 



It is very doubtful whether this group has any true existence. It is noteworthy that 

 while the closely allied genus Porites is richly developed, both fossil and recent, over the West 

 Indian area, there should be no recorded recent Goniopora, while the only known fossil which 

 appears to be a Goniopora is not of a primitive type. 



145. Goniopora 1 Antigua (i)l. (PI. XIV. fig. 17.) 



[Antigua (Miocene ?) ; Museum Geol. Sue. London, and British Museum.] 



Rlwdarcm irregular^, Duncan, Quart. Jour. Geol. Soc. XIX. (1863), p. 426. 



Stephanoca'.nia tenuis et intcrsepta, Duncan, op. cit. p. 423, PI. xiv. 3rt, 36, and XX. (1864), p. 27. 



Description. — Corallum massive, with polygonal calicles running straight, side by side> 

 as nearly open tubes about 3' 5 mm. in diameter. Walls thin, membranous, apparently 



X -2 



