54 ZOOLOGICAL COLLECTIONS MADK DURING [Jan. 4, 



shallow pits. Mouth entire, transversely elongated, subhorizontal, 

 the lower lip being salient but not toothed. A round avicularium 

 below or on the edge of mouth, on a small rostrum. 



Ooecium elongate, with a deep broad sinus penetrating into it 

 from the mouth. Dorsal surface minutely roughened, but shining ; 

 the outHnes of the cells marked by shallow grooves ; a small rounded 

 avicularium on most cells. 



Hab. Tom Bay, S.W. Chili, 0-30 fathoms. 



Six broken fragments, probably all belonging to one colony, re- 

 present the species. It is distinguished from R. beaniana. King 

 (Hincks), by the sinus (not a slit) of the ovicell, and by the incon- 

 stancy of the position of the suboral rostrum, which is most usually 

 separated by a considerable gap from the mouth. 



Ckllepora tubigera, Busk. 



Cellepora tubigera. Busk, Crag Polyzoa (Mon. Palseont. Soc), 

 p. CO, pi. ix. figs. 8, 10. 



The sinus of the month is sometimes small and on a level with 

 the mouth (as in Lepralia trispinosa, Johnston, &c.) ; otherwise it 

 forms a great vertical gap in the peristome. The rostrum is some- 

 times pointed and bearing an avicularium on its inner aspect (as in 

 0. pumicosa), sometimes broad at the apex ; it is sometimes placed 

 laterally with regard to the cell, and sometimes at some distance 

 from it. The cells are rough or smooth, much or little punctured. 

 The ovicells are globose, smooth, with a few slight ridges running 

 usually across their breadth, or with a crown of punctures on the 

 upper surface from which radiate slight ridges. There are large long 

 avicularia between the cells, generally on special raised but flattened 

 bosses. Two young and nine adult colonies occur in this collec- 

 tion, embracing Sertularian and Tubularian stems, exactly after the 

 manner of C. pumicosa. 



Rab. Trinidad Channel (off Madre-de-Dios Islands), S.W. Chili. 

 One group, consisting of one young and two adult colonies, from 

 30 fathoms ; for the rest the depth is not known. All on Sertularian 

 stems, with one doubtful exception. 



Cellepora bilabiata. Busk. 



Cellepora bilabiata, Busk, Voy. of Rattlesnake, p. 382. 



Two colonies, one forming almost a perfect hemisphere, the other 

 flattened, uneven. Both lips of the elevated peristome sometimes 

 bear avicularia. From the " scutiform area " (which is really formed, 

 as shown by varieties, from a sinus which once extended into it from 

 the mouth) of the small ovicell no grooves appear to extend in this 

 case. The species is nearly related to C. tubigera, Busk. 



Hab. Elizabeth Island, G fathoms. 



Cellepora mammillata, Busk. 



Cellepora mammillata. Busk, Cat. Mar. Polyz. Brit. Mus. p. 87, 

 pi. XX. figs. 3-5. 



The specimen, which, owing to its growth over a pedicelled knob 



