90 LIVERPOOL MARINE BIOLOGY COMMITTEE REPORT. 



Leucones are those with branched canals, and the Sycones 

 those with a radial canal system. Polejaeff does not agree 

 with Haeckel's distinction of Leucones from Sycones, but 

 proposes to group the Ascones in one order, Homocoela, and 

 both the others in another order, Heteroccela, treating the 

 Calcarea as a separate Class. 



The Calcarea found on our coasts are usually very small. 

 I have never found an example of Sycandra compressa more 

 than one-and-a-half inches in length, but Dr. Bowerbank 

 speaks of one from Ipswich River five inches long by three- 

 and-a-quarter broad. Sycandra ciliata is generally a quarter 

 to half an inch in length, but Ipswich River produced one 

 for Dr. Bowerbank three inches long by three-quarters 

 of an inch in diameter. The size evidently depends on the 

 locality being favourable for growth or otherwise. 



Family. — Ascones. 

 Ascaltis botryoides, H. 



Leucosolenia botryoides, Bk. 



Orantia botryoides, Fleming and Johnston. 



The specific name is descriptive of the way in which a 

 number of individuals of the species are found congregated 

 together in branches or tufts.* Colour white. 



L. F. M., No. 25. 9. 73. 3. Collected at Holyhead. 



Ascetta coriacea, H. 



Leucosolenia coriacea, Bk. 



Grantia coriacea, Fleming and Johnston. 



This is a pretty encrusting species. f Colour greyish 

 white or dark crimson, or lemon yellow or nut brown. 



* Mon. Brit. Spong., vol. ii, p. 28 ; vol. iii, pi. iii, figs. 1-4. Bie 

 Kalksclno amine, vol. ii, p. 65 ; vol. iii, taf. 9, fig. 10. 



\Mon. Brit. Spong., vol. ii, p. 34; vol. iii, pi. iii, fig. 11-14. Die 

 Kalkicliwdmme, vol. ii, p. 24 ; vol. iii, taf. 3. 



