328 REPORT 1868. 



bricius in his ' Fauna Gronlandica ' forty-eight years before, and simi- 

 larly the next species appears as Lemosolenia botryoides, Bowerbank, 

 though Ellis and Solandef were the describers of the species under the 

 name Spongia botryoides. A curious aggregated form occurs in company 

 with the var. G. compressa in Halse Hellyer. 



Leucosolenia botryoides (Ellis & Sol.). Common under stones and attached 

 to seaweeds. Specimens of gigantic growth found in the same spot with 

 the very large Grantia compressa, living attached to the underside of 

 stones. 



lacunosa (Johnston). " Shetland, 1864 " (Peach, fide Bowerbank). 



coriacea (Montagu). Common under stones, and on the sides of caves 



in various parts of Shetland. Abundant in Halse Hellyer, Burrafirth, 

 where lemon-yellow and white varieties live side by side. 



Leuconia nivea (Grant). " Shetland, 1864 " (Bowerbank in litt.). The speci- 

 mens in this and other cases thus quoted Dr. Bowerbank informs me 

 were sent to him by Messrs. Jeffreys and Peach. 



Jtstulosa (Johnston). Dredged in St. Magnus Bay, 30-60 fathoms. 



Order SILICEA. 



Geodia Zetlandica, Johnston. " Island of Eoulah and Unst " (Jameson). 



Pachymatisma JoTinstonia, Bow. A single specimen, procured after great 

 difficulty, and not without some danger, at the extremity of ' Will 

 Hellyer,' Burrafirth, a cave of difficult access, except under most favour- 

 able conditions of weather. 



Genus NORMANIA, Bowerbank, n. g. 



" Skeleton composed at the external surfaces of short fasciculi of siliceous 

 spicula ; in the interior, of an irregular siliceo-spicular network. Dermis 

 furnished with ternate connecting spicula. Ovaria membranous, aspiculous. 



" Type, Normania crassa. 



" The general structure of the skeleton of the type specimen of this genus 

 is very like that of Pachymatisma, but it is readily distinguished from that 

 genus by the total absence of siliceous ovaria, and by its thin and delicate 

 dermal system. 



" The radial structure of its skeleton near the surface of the sponge, and 

 its dermal connecting spicula, bring it somewhat into alliance with Ecionemia, 

 but the total absence of a central axial column readily distinguishes it from 

 that genus. I have named this genus after my friend the Rev. Alfred Merle 

 Norman, the ardent and accomplished naturalist to whom I am indebted for 

 numerous new and valuable species of British sponges." 



" A genus Normania was established by Mr. G. S. Brady in 1866, for a 

 section of Crustacea Ostracoda (vide Trans. Zool. Soc. vol. v. p. 382), but 

 that title cannot be adopted, as the Normania of Brady is identical with 

 Loxoconcha of G. 0. Sars, which was founded a few months previously (vide 

 G. 0. Sars, Oversigt af Norges marine Ostracoder, 1865, and G. S. Brady, 

 Trans. Linn. Soc. vol. xxvi. 1868, p. 432). 



" Normania crassa, Bowerbank, n. sp. Sponge cup-shaped, sessile ? ; parietes 

 stout and thick. Surfaces smooth, outer one minutely reticulated. Os- 

 cula on inner surface simple, variable in size, very numerous. Dermis 

 thin, pellucid ; outer surface furnished with a stout polyspiculous irre- 

 gular reticulation ; on the inner one with numerous dispersed tension- 

 spicula large and small; spicula subfusiformi-acerate; and also with 

 numerous large and small attenuato-stellate retentive spicula. Con- 



