82 Rev. A. M. Norman on undescribed 



confirmation of the accuracy of Professor Schultze's view ; and 

 we must henceforth regard all siHceous spicules exhibiting tubu- 

 lar cavities as distinct in their origin from the organisms within 

 whose chambers they occur, unless every portion of the wall or 

 framework of such chambers is similarly constituted. 

 Kensington, December 18, 1863. 



XII. — On undescribed British Hydro zoa, Actinozoa, and Polyzoa. 



By the Rev. Alfred Merle Norman, M.A. 



[Plates IX., X., XL] 



Although the animals formerly associated in the class Zoophyta 

 have long since been physiologically parted asunder, it is often 

 practically convenient to unite them, or rather, perhaps I should 

 say, to arrange them side by side, in our collecting, our cabinets, 

 and our papers. I trust therefore that this practical convenience 

 may be deemed a sufficient excuse for here bringing together 

 descriptions of animals belonging to totally different classes. 



I must return my sincere thanks for the assistance that I 

 have received from my ever-kind friend, Mr. Alder. Any value 

 that this short paper may have will be due to his accurate 

 drawings which illustrate the species. 



Class HYDROZOA. 



Fam. Corynidae. 



Genus Tubiclava (Allman). 



Tubiclava Cornucopia, n. sp. PI. IX. figs. 4 & 5. 



T. reticule tubulorum conchis viventibus adherentium basali ; hydro- 

 thecis ab hoc reticule assurgentibus cornucopiis forma similibus, 

 supra quam infra paule latieribus, suberectis, vix curvatis, sub- 

 diaphanis, incrementi lineis plus vel minus circumcinctis ; pelypis 

 elengato-claviformibus, tentaculis filifermibus, discretis, et in capita 

 et in stipite sparsis ; gonopheris mori fructus fermam referentibus, 

 genoblastidiis brevissimis, tubulis repentibus adjunctis, affixis. 



Pellicis quadrantem vix attingit. Mare Zetlandicum habitat. 



A number of little trumpet-shaped tubes arise from a creeping 

 base, which is attached to the shells of living Mollusca. These 

 slightly curved tubular hydrothecse are a fifth of an inch or a 

 little more in height, narrowest at the bottom, and from thence 

 of gradually increased diameter towards their distal extremity. 

 Here and there encircling slightly elevated lines on the hydro- 

 theca mark the successive stages of the animaFs growth. The 

 polypites are furnished with greatly elongated club-shaped heads, 

 over the whole of which, as well as upon the upper portion of 



