450 REPORT ON THE POLYZOA COLLECTED BY DR WILLEY 



produced at the angles ; between the zooecial rows four series of cancelli which are 

 not denticulate ; those belonging to the two central rows of each interspace as large 

 as the orifices of the zooecia, the lateral cancelli being smaller. 



The colony is about 5 mm. in diameter. Two specimens only occur in the collection. 



61. Radiopora cristata, Busk. Busk, Brit. Mus. Cat., III. 35. 

 There are numerous fine colonies of this species. 



62. Fasciculipora carinata, Ortmann. Ortmann, "Jap. Bryo. Fauna." Arch. f. 

 Naturg., 56, i. 1890, p. 65. 



One colony. 



63. Zoobotryon pelliicidum, Ehrenberg. Reichert, Abh. k. Akad. Berlin, 1869. Ii. 



These specimens differ slightly from the Mediterranean species in the arrange- 

 ment of the zooecia. Here the individuals are more crowded at the ends of the 

 branches, while there are longer spaces devoid of zooecia on the main branch. 

 Otherwise the characters seem to be those of Ehrenberg's species. 



EXPLANATION OF PLATES XLII AND XLIII. 



All the figures were drawn by means of a camera lucida; figs. 1, 5, 6, 8, 9, 10, 11, 



12 and 13 with a Crouch objective A with front lens on; figs. 2 and 2 a, 3 and 3 a, i, 



7 and 14 with Crouch objective A ^vith front lens off. All the figures were then reduced 

 by one half. 



Fig. 1. Canda retiformis, Pourtales. 

 Fig. 2 and 2 a. Didymia triserialis, n. sp. 

 Fig. 3 and 3 a. MonoporeUa polymorpha, n. sp. 



Fig. 4. MonoporeUa spinifera, n. sp. 



Fig. 5. Schizoporella triangula, Hincks. 



Fig. 6. Schizoporella depressa, n. sp. 



,, 6 a. Young zooecia of same. 



Fig. 7. Lepralia feegeeusis, Busk, showing ovicell. 



Fig. 8. Lepralia tuberculata, n. sp. , 



Fig. 9. Lepralia calyciformis, n. sp. 



,, 9 a. Colony of same, four times natural size. 



Fig. 10. Smittia marmorea, Hincks. 



Fig. 11. Mucronella articulata, n. sp. 



Fig. 12. Escharoides spinigera, n. sp. 



Fig. 13. Ovicells of Retepora denticulata, Busk. 



Fig. 14. Lichenopora truncata, n. sp. Part of a colony seen from the side. 



„ 14 a. Colony of same, four times natural size. 



Fig. 15. Cellepora longirostris, MacGill. The rostrum below the ovicell has been broken off. 



„ 15a. Young zooecia of same. 



