100 Proceedings of the Royal Irish Academy. 



A beautiful, simple colony of a pale orange colour. It is 17 cm. in 

 length. The base is broken off and the tip is dome-like. 



The coenenchyma is moderately thick, and is finely granular. The polyps 

 are distributed over the whole of the coenenchyma ; in some parts they 

 appear as if in spirals, but they are in reality in longitudinal rows, the 

 members of which irregularly alternate. Four of these rows may be seen 

 from one aspect. The verrucae are extremely small, and ai-e sunk into pits 

 in the coenenchyma, so as to be almost level with it (fig. 83). The members 

 of one longitudinal series are separated by distances about three to four 

 times the length of the verrucae. The verrucae themselves are somewhat 

 cylindrical, and have a distinctly eight-rayed summit. There is not the 

 slightest trace of a bare tract. 



The canal system is, however, typical. The two large main canals are 

 quite prominent in a cross-section. This reminds one of the type of Jimcella 

 juTicea with non-projecting verrucae. 



The axis is lamellar, densely calcareous, and very hard ; the surface is 

 indefinitely marked by longitudinal atriations. 



Locality. — Off and east of Cape Morgan, 36 fathoms. Bottom : stones. 



A long, simple, flagelliform colony, 50 cm. in length. The diameter near 

 the base is 5 mm. ; near the tip it is 4 mm. The coenenchyma is thick, 

 being slightly over 1 mm. throughout. The general colour of the colony is 

 a dull orange-red. 



The polyps are distributed in two longitudinal series separated by two 

 narrow bare tracts ; there are four to seven alternating rows in each series. 

 The verrucae are small and are closely adpressed to the coenenchyma, 

 being sunk in pits so as to be almost level with it. They are very much 

 retracted, however, and there is every reason to believe that when expanded 

 they would be more than double their present length (fig. 84). 



The members of one row irregularly alternate with those of the 

 adjacent row. 



The canal system is well developed, and is clearly seen in the thick 

 coenenchyma ; the two main canals are very large. 



The axis is flexible, but very hard and densely calcareous ; it is about 

 2"5 mm. in diameter near the base. The surface is marked by distinct 

 longitudinal striae. 



Loculity. — Umhlangakulu River mouth, N.-W. by N., 7^ miles ; 50 fathoms. 

 Bottom : sand, shell, and sponge fragments. 



An almost complete colony, 24 cm. in length, of which only the base 

 is wanting. This specimen is extremely interesting, as it shows to what 

 extent the polyps may be extruded in this species. 



