Actinaria G 10] 



referred to Paractidse. Probably its acontia had been lost by strong contraction. 

 In that case it would belong to this subfamily and would come near Hormathia, 

 on account of its smooth capitulum and scapus, but it differs from that genus, 

 as at present understood, in lacking a circular row of coronal verruca? on the 

 parapet. 



In these characters it is like the Actinia abyssicola Moseley, referred to 

 Stephanactis by Hertwig. Both he and Moseley described the parapet as thick- 

 ened but not verrucose. Hertwig found a few cinclidse, but no acontia. 



Raphactis abyssicola (Moseley) Verrill. 



Actinia abyssicola MOSELEY, Trans. Linn. Soc., Ser. 2, Vol. 1, p. 297, PL 45, 

 fig. 5, 1877. Andres, op. cit., p. 364. 



Stephanactis abyssicola HERTWIG, op. cit., 1882. 



Plate XXII; Fig. 7(?) 



According to Moseley, in life its colour on the column was reddish yellow, 

 paler on the parapet; capitulum rose-red, with darker radial lines; disk rose- 

 red, tentacles paler red. Height was 5' mm.; greatest breadth, 35 mm. It 

 was taken in lat. 40 17' N., south of Nova Soctia, in 1,350 fathoms, in 1873. 



It probably should be called Raphactis abyssicola, for it agrees well with 

 the type of that genus, in most respects. Perhaps my fig. 7, of pi. XXII, is 

 the same species, from near the same region. 



Synanthus mirabilis Verrill. 



Synanthus mirabilis VERRILL, Amer. Journ. Science, Vol. XVIII, p. 474, 1879; 

 vol. VII, p. 211, fig. 23, 1899 (pars); Bull. Mus. Comp. Zool., vol. xi, p. 48 

 1883. (Probably not fig. 9, pi. VI). 



x2 



Fig. 15. Synanthus mirabilis Verrill. Two individuals surrounding and girdling a branch of 

 Paragorgia (c, d,), and united by a suture above and below (a, b,); x about !. 



This small species has not yet been obtained in a sufficiently good state 

 of preservation for complete anatomical studies by sections; it has about 

 pairs of mesenteries; only six pairs are perfect; sphincter muscle mesoglceal, 

 thick. 



It has the amplexicaul habit, common to many other deep sea species. 

 This particular species seems to prefer to attach itself to the smaller branches 

 of Paragorgia arborea. It then spreads its base around the branch, the two 

 opposite lobes meeting and uniting by a suture, thus girdling the branch an< 

 sometimes causing a deep constriction, at which the branch may easily break 

 off. Frequently two or more unite together, to form the girdle, as in the ngure. 



