26 



BRITISH TUNIOATA. 



Alcyonium tuberosum in forma di fico frutto. Bonanni : 

 ' Museo Kirscli/ (1709), pp. 178, 179. 



Pulmo marinus alter Rondeletii. Ray : ' Synops. ineth. 

 Avium et Piscium ' (1713), p. 31. 



Alcyoniinn quint um anti-quorum . Mercati : ' Metalotheca 

 Vatic.' (1715), cap. vi. 



The " Figue de substance d'Eponge et d'Alcion " of 

 Marsigli ('Hist. Phys. de la Mer,' 1725, p. 87, pi. xvi, 

 fig. 79), which is sometimes referred to this species, is 

 most probably a sponge. 



FIG. 99. ? Aplidium ficus. Two colonies, one half natural size. 

 (After Mercati, loc. cit.) 



The figures here given from Mercati (fig. 99) are 

 very fig-like, but much reliance should not be placed 

 upon them as truly representing the species. 



2. Aplidium melleum sp. nov. 

 (Plate LV, figs. 1 and 2, and PL LVI, fig. 6.) 



Colony conical or sub-triangular, small, honey-yellow 

 coloured, transparent, attached to the stems of sea- 

 weeds either by the side or by a narrow base (PI. LV, 

 figs. 1 ^ 1 and 2). Individuals rather darker coloured 

 than the envelope, yellow or orange, arranged irregu- 

 larly through the mass. Branchial aperture 6-lobed. 

 Stomach longitudinally plicated ; intestine not twisted. 

 Post-abdomen very short. 



/ 



Diameter of mass from a quarter to half an inch 

 (612 mm.). 



Hal. On sea- weed, between tide-marks. 



