THORNELY— MARINE POLYZOA OF THE INDIAN OCEAN 143 



25. Memhranipora pedunculata, Manzoni, Bry. fr. Ital. 4* cont. sitzb. d. k. akad. 

 d. Wissensch., Ixi, p. 7 ; Hincks, Ann. Mag. Nat. Hist., ser. 5, vi, 1880, p. 377. 



There are a few zooecia with ooecia attached growing on a small bit of shell and corre- 

 sponding with Hincks' description of this species. There are mixed up with this colony- 

 some zooecia with two spines at the top and two avicularia pointing upwards on either 

 side, below the spines. These zooecia, which differ entirely from those I have referred to 

 M. pedunculata, must belong to another colony, but are growing as one with M. pedun- 

 culata on the shell. 



Saya de Malha, 125 fath. 



26. Memhranipora variegata, Hincks, Ann. Mag. Nat. Hist., ser. 5, viii, 1881, 

 p. 131. 



The spines are, as Hincks describes, dark at their bases, the upper four standing 

 upright and thicker, while the six or seven lower ones lie across the zooecium and are more 

 slender. None have the tendency to become clavate. Ooecia, not seen by Hincks, are 

 smooth with an arch across the centre as in M. lineata, Linn., which is either pointed or 

 square, with sometimes a very small avicularium directed upwards in the centre above it. 



Providence, 50 — 78 fath. 



27. Memhranipora savartii (Aud.). Waters, Ann. Mag. Nat. Hist., ser. 5, xx, 1887, 

 p. 181. 



There is a small but good colony of this form, brownish in colour owing to the 

 membranous covering, which is well preserved. There are calcareous nodules at the bases 

 of the zooecia, one or two, according to the width of the zooecium, and there are denticles on 

 the upper margin of the calcareous portion which incline backwards into the ox'ifice and 

 are jagged at their edges. 



Providence, 50 — 78 fath. 



28. Memhranipora granulifera, Hincks, Ann. Mag. Nat. Hist., ser. 5, vi, 1880, p. 72. 

 Providence, 50 — 78 fath. ; Amirante, 25 — 80 fath. 



29. Onychocella velata (Hincks), Ann. Mag. Nat. Hist., ser. 5, viii, 1881, p. 130. 

 The one specimen of this form in the collection is old and the colour faded to a veiy 



pale brown. The crenulated margin of the zooecium is broad. There is only one broken 

 avicularium present, but enough to show the right position and shape. Thei'e are several 

 ooecia. 



Saya de Malha, 29 fath., growing on a piece of old shell. 



30. Micropora coriacea (Esper.). Hincks, Brit. Mar. Pol., 1880, p. 174. 



This is Hincks' variety which has no nodular enlargements of the margin below the 

 orifice but unlike Hincks' variety they have avicularia as on his ordinary species. No 

 ooecia are present. 



Providence, 50 — 78 fath.; Saya de Malha, 125 fath. 



