228 Mr. II. J. Carter on Deep-sea 



An "Addeudiim " will be appended, in which a list of all 

 the sponges dredged np by the ' Porcupine ' during her cruises 

 in 1869 and 1870, with their respective localities generally, 

 will be given ; then a list of all the dried specimens without 

 numbers which have been handed over to me ; linally, a few 

 " Memoranda " on some minute organisms which accompanied 

 the sponges — to wit, Poli/treina, Xant/iidium, and Coccoliths, 

 together with a note on the '' black grains " often seen in great 

 abundance in the Globigeriniferous sand. 



Ilalisarca cruentaj n. sp. 



General fonn film- like, spreading, with irregularly undu- 

 lating margin. Colour madder-brown, crimson, becoming 

 crimson-black on the surface Avhen dry. Surface smooth, 

 corresponding with the in-egularities of the object on which 

 it may be growing ; consisting of a delicate sarco-fibrous 

 layer. Pores and vents not recognized. Internal structure 

 madder-pink, composed of areolar sarcode in which are im- 

 bedded the ampullaceous sacs and, when present, also ova, 

 which are known by their spherical form and deeper colour ; 

 traversed by the branched excretory canal-system. Ampul- 

 laceous sacs about 10-6000ths inch in diameter ; spongozoa 

 about f-GOOOth, and ova about 4-6000ths inch in diameter. 

 Size of specimens varying, under 2 inches in horizontal dia- 

 meter. 



Hah. Marine, on tlie surface of Corallistes Boioerbanhiij 

 Johnston ; Stelletta pachastrelloides^ n. sp., and Pachastrella 

 abyssij Sdt., extending into and tinging with its red colour 

 for a certain distance the structure on w^hich it may be 

 growing. 



Loc. Station 25=374 fathoms — that is (as the "station" 

 and " depth " are inserted together on the " Chart "), a few 

 miles north of Cape St. Vincent. 



Ohs. This sponge has very much the appearance of spots 

 of venous blood, especially when dry ; and the colom* is deepest 

 where the specimen is charged with ova, from the dark crimson 

 colour of the latter. It looks very much like Hildenhrandtia 

 ruhra at first sight, on account of its thinness and dark blood- 

 red colour ; but the absence of the algal cell and the presence 

 of ova distinguish it from the cellular structure charged with 

 conceptacles bearing tetraspores and paraphyses in the latter. 

 As the specimens are not favourable for description, the above 

 observations must to a certain extent be taken provisionally. 

 It is at all times difficult to make out the minute structure of 

 Ilalisarca^ which can only be most advantageously examined 



