Ecv. A. M. Norman on a few Hehridean Sponges. 297 



Spongiadae ' it is recorded as dark crimson, dirty bluish- 

 grey, and deep nut-brown ! 



Leuconia nivea (Grant). Tidemarks, Tobermory. 



Order SiLiCEA. 



Normania crassa, Bowerbank. This is a new genus, of which 

 a description will be found in my Shetland Dredging Re- 

 port [vide British Association Report, 1868 (1869)]. The 

 type specimen measures six inches long, two and a quarter 

 high, and rather less across. It is massive, but shows a 

 tendency to assume a cup-like form. The Mincli speci- 

 men is one inch and a half lono; and as much in heio^ht, 

 and is massive. It is not in such tine condition as the 

 type, having been rolled and somewhat water-worn. The 

 genus is intermediate in character between Pachymatisma 

 and Ecionemia. 



Polymastia mamillaris (Miiller). Dredged in the Minch ; spe- 

 cimens small. 



Tethea cranium (Muller). Dredged in the deeper parts of the 

 Minch, where it occurs in company with many other spe- 

 cies which are found associated with it in the Shetland 

 seas, — e. g. Phakellia ventilahrum^ Isodictya infundihuli- 

 formis and laciniosa^ Normania crassa, Trochus occiden- 

 talism Chemnitzia eximia^ Scissurella crispata, Crangon 

 serratus, Hippolyte cidtellata, Caberea Ellisii, Lepralia 

 polita, laqueata, and crystallina, Idmonea atlantica, Hor- 

 nera horealis, &c., which species, with three exceptions, 

 are not as yet known to occur further south than the 

 Minch. 



Dictyocylindrus stuposus (EUis & Sol.). Young specimens, but 

 in very fine condition, dredged in the Minch. 



Phakellia ventilabrum (Linn.). Very fine in the Minch. 



Hymedesmia radiata. Bow. On a valve of Pecten islandicus 

 dredged in the Minch. The type and only other known 

 specimens are from the Shetland Haaf. 



Hymeniacidon aurea (Montagu). Between tidemarks, Tober- 

 mory ; the specimens of a scarlet colour. 



H. Jicus (Esper). A small specimen, between tidemarks, Oban ; 



the first time that I have met with the species mider such 



circumstances. 



Cliona celata, Grant. Dredged in the Minch and Sleat Sound. 



Halichondria panicea (Pallas). Tidemarks, common, as every- 

 where. 

 Ann. & Mag. N. Hist. Ser. 4. Vol.Vu. 22 



