232 Mr. H. J. Carter on Deep-sea 



of sponges. In the same jar also are specimens of Dictyo- 

 cylindrus ahyssorum^ n. sp. ; Phakellia infimdihuliformis ; 

 Halichondria Hyndmani^ Bk. ; WyviUe-Thomsonia Wallichiiy 

 Wright, = Tisiphonia agariciformisj Wy. T. ; and Pachastrella 

 abyssi, Sdt. 



HiECiNiA {Polytherses, Duchas. de Fonb. et Mich.). 



A small cubical fragment, about two inches in diameter, of 

 coarse structure and brown colour, in which the sarcode has 

 been entirely replaced by the alga Spongiophaga communis. 



Loc. Station 25, in 374 fathoms, near Cape St. Vincent. 



Spongelia pallescens, Sdt. ( Adriat. Spongienf. p. 30, 

 Taf. iii. fig. 8). 



In jar 84, depth 155 fathoms, there is a finger-shaped 

 fragment or lobe of this sponge about 2 inches long and | 

 inch in diameter, now of a light whitish grey colour. It 

 appears to have been torn off from a larger specimen. The 

 surface presents a uniformly reticulated structure, in which 

 the knots consist of sharp monticular eminences, and the 

 interstices are depressed as is usual in all the Psammonemata, 

 with here and there a large circular vent. It is sandy 

 throughout, but differs from the following (viz. Dysidea 

 fragilis) in possessing a more definite form, which arises, 

 perhaps, from the horny element being more developed, both 

 around the sandy cores and as simple fibre throughout the 

 structure generally. There is an arenaceous sponge in the 

 British Museum of a greyish brown colour, massive and 

 lobed, with large vents, which seems to be an intermediate 

 species. It comes from Port Jackson in Australia; and the 

 variety of spicules amongst its sand-grains is very remarkable, 

 as indicating the number of different sponges that must be in 

 that locality. Of course, the nature of the foreign contents 

 depends entirely upon the kind of material at hand for the 

 sponge to build with. 



Dysidea fragilis J Johnst. 



Small amorphous fragments of this sponge were dredged 

 up at stations 65 and 82, in 345 and 312 fathoms respectively. 



Dictyocylindrus ahyssorum, n. sp. (PI. XII. fig. 3, and 

 PI. XV. fig. 25, a, h.) 



General form dendritic, branched dichotomously three or four 

 times on the same plane. Hard. Branches round, somewhat. 



