102 On some Mediterranean Bri/ozoa. 



this has not been figured a somewhat diagrammatic figure is 

 given (fig. 14). In various species besides the usual row o£ 

 pores there may be one or two near the centre of the area, 

 and in a specimen from Glenelg, South Australia, the whole 

 of the ovicell area has numerous pores. This last is very 

 closely allied to my L. caminata, in which a few pores may 

 be seen between the rows. In L. costazii, Aud., besides the 

 usual row of pores at the distal edge of the area, there is 

 frequently another row at the proximal edge, as is also the 

 case in L. lacinosa, Calvet, which may be costazii, Aud. 



The two straight sclerites of the mandible (fig. 1G) are 

 quite similar to those of L. lucida, and I only know them in 

 these two species and L. caminata. Something of the kind 

 occurs in Thalamoporella rozieri, Aud. 



The oblique peristomial avicularium, figured by MacGilli- 

 vray in his Lagenipora nilens, occurs also in the 'Challenger' 

 L. bilabiata, B. ; in what has been called C. granum ; in the 

 L. lucida, H. ; in L. diadema, MacGr. 



L. ignota, may be only an erect form of L. lucida, and 

 there are many cases of Cellepora in which the young and the 

 adult forms have received different names. Both have the 

 diagonal peristomial avicularium and the long narrow 

 avicularium. 



Loc. Madeira, 70 fath. (iV~.) ; Tortugas, 12 fath. (0.) ; 

 Oran, 54 fath. From material given by Mons. Oanu. 



EXPLANATION OF PLATE XII. 



Fig. 1. Vedicellina hirsuta, Jullien, x 85. a, spines, x 250. From 



Naples. 

 Fig. 2. Lepralia bifurcata, sp. n., X 25. a, natural size. From Capri. 

 Fig. 3. Ditto, x 25. Showing the bifurcation and large round 



opening. 

 Fig. 4. Ditto. X 50. Showing an ovicell and two spathulate 



aviculaiia. 

 Fig. 5. Vedicellina hirsuta, Jullien. X 12. 

 Fig. 6. Lepralia circumcincta, Neviani. x 12. From Oran. 

 Fig. 7. Ditto. X 85. Operculum. 



Fig. 8. Ditto, x 85. Operculum of ovicelligerous zooecia. 

 Fit/. 9. Ditto. Lateral wall, showing rosette-plates. 

 Fig. 10. Ditto. Distal wall, „ „ 



Fig. 11. Lepralia ora?iensis, sp. n. X 25. From Oran. 

 Fig. 12. Ditto. X 85. Operculum. 

 Fig. 13. Ditto. X 85. Mandible. 

 Fig. 1L Lagenipora socialis, Hincks. Showing ovicell, somewhat 



diagrammatic. 

 Fig. 15. Lagenipora ignota, Norman. X 50. From Oran. 

 Fig. 16. Ditto, x 85. Mandible. 

 Fig. 17. Ditto, x 85. Operculum. 



