PoJyzoa of the Adriatic. 307 



me doubtful whether MacGillivray's C. costata is the same 

 thing. The description of the ovicell as " small " and " glo- 

 bular " could certainly not be applied with any accuracy to 

 that of G. retusa, var. canwiata. C. rota, MacG., is pro- 

 bably the present species ; but judging from Manzoni's 

 description and figures (' Bri. foss. del Mioc. d'Austr.' &c.), 

 I should certainly not have suspected any very close rela- 

 tionship between it and C. globularis, Bronn. Of course 

 if Mr. Waters were right in regarding them as the same 

 species, Bronn's name must be adopted. The point must 

 be left for future settlement. The present species belongs to 

 the same group as G. Gostazii, Audouin, and G. incrassata, La- 

 marck. The structure of the ooecium is very similar in all of 

 them, and they all possess the raised aviculiferous processes on 

 the sides of the orifice. In the present form there is an 

 additional one on the lower margin, but it is frequently absent. 

 There is also a stout mucro on each side of the margin be- 

 tween the anterior and lateral aviculiferous processes. The 

 cells are large, erect, distinct, the walls punctured and fur- 

 rowed longitudinally, and the large spatulate avicularia are 

 very numerous. 



Cellepora ? sp. 



Zoarium erect, stem subcylindrical ; zooecia irregularly dis- 

 posed, ventricose, erect, not prominent, surface smooth and 

 dense, orifice suborbicular, slightly produced below into a 

 small shallow sinus, peristome not elevated, somewhat thick- 

 ened, on the lower margin a mucro (not usually much elevated), 

 bearing on the summit a small avicuJarium with a very 

 short subacuminate mandible ; large spatulate avicularia, 

 much expanded at the extremity and borne on a raised 

 framework, scattered amongst the cells. Ooecium (?). 



One or two small specimens only of this form have occurred. 

 I am unable to identify it with any known species. 



Suborder Cyclostomata. 

 There are few Cyclostomata in Dr. Pieper's collection, and 

 none of any special interest. The following species are not 

 recorded by Heller. 



Family Tubuliporidae. 

 DiASTOPORA (part.), Lamouroux. 

 Diasto-pora patina, Lamk. 

 The Diastopora patina of Heller is the Lichenopora radiata 

 of Audouin (sp.) *. 



* In my ' Hist. Brit. M. Pol./ p. 458, 1 have inadvertently identified 

 Heller's species witli the true B. imtina. 



