Report on the zoological collections made in the Indo-Pacific Ocean ...

;SPONGIIBA. 413by a short narrow pedicle, which rises broadening and flattening,and producing two broad expansions, about 25 millim. long, whichbend to one side, where they meet and unite by their apices.The fragment consists of a similar wing-like expansion ; so thatthis character is j)robably more or less constant in the species.The large size of the spicules and the coarse, though vague, dermalskeleton seem to justify the generic position I have assigned to thesponge. Pellina bibula, Schmidt (Baltic), resembles it in form, buthas no apparent vents, and the spicules measure only 'IS to '24 millim.in length.47. Pellina, sp.Tubular. Part of a specimen, consisting of a detached subcylindricaltube, 30 millim. long, 10 millim. in extreme diameter, wall2*5 millim. in greatest thickness; tube contracted towards mouth,which is 4 mOlim. across and has a thin margin. Consistence firm,brittle ; colour dull brown. Skeleton irregular ; tracts loose. Spiculessmooth acerate, slightly curved, tapering very gradually tosharp points ; size "6 by '02 millim.The spicules are larger than in the European species of the genus ;but I do not assign a specific name, as the specimen is imperfect.Hah. Port Curtis, Queensland, 11 fms.Some very small, massive, rounded specimens from Port Darwin,between tide-marks, with spicules measuring -8 by -02 miUim., areperhaps young forms of a variety of this species.48. Pellina, sp.Massive. Nearly allied to " Beniem, yellow" of Carter (Ann. &Mag. N. H. (5) vi. p. 48), from the Gulf of Manaar, and possibly identicalwith it, although that form seems to be paler in colour, and itsspicule as described would be about -24 by •02 millim. in size. It seemsto consist normally of a massive base, which sends up digitate processes,suboval in transverse section and about 15 millim. in greatestbasal and 5 millim. in greatest apical diameter respectively. Consistencein spirit firm, brittle ; colour dull brown. Surface even,covered by thin glabrous dermal membrane. Vents few, scatteredusually on the narrow margin of the sponge, receiving the largerexcretory canals at a slight distance below surface, oblong, maximumgreater and less diameters usually 3 and 1-5 to 2 millim. respectively.Main skeleton composed of loose spiculo-fibro 1 to 2 spiculesbroad ; the primaries only approximately vertical to surface ; thesecondaries irregular in direction. Dermal skeleton reticulatefibre usually 2-3-serial, very loose. Sarcode reddish brown, somewhatgranular. Spicules smooth acerate, tapering to sharp pointsfrom about four diameters from ends; size '38 by "0127 millim.Specimens fragmentary.Another compressed specimen, terminating in an angle above, andwith a single orbicular vent about 3 millim. wide, leading deeply