KHABDOCALYPTUS ÜNGUICULATUS. 269 



(PI. XIX., fig. 17) or of R. capiUalus (PI. XXII., figs. 3-5). 

 Two of them grow together on a mass of coal-cuider in company 

 with the hirge and beautiful specimen sliown in PI. XXI., which 

 will soon be described in detail as the type of the species. A 

 fifth specimen (S. C. ]\I. No. 473) shows a tubular shape, 58 mm. 

 high. A sixth (S. C. INI. Xo. 402), 100 mm. high, is much 

 macerated ; it is attached to a branch of Ceratoisis sp. together 

 with a small R. victor. Finally two more specimens, which 

 belonged to a collector, came under my inspection ; they were 

 both tubular and somewhat fusiform, measuring respectively 115 

 mm. and 150 mm. in height. These two also grew on a piece of 

 coal-cinder, erect and side by side. In the gossamer-like covering 

 and in other points of the macroscopic characterization, they agreed 

 w^ell with the type-specimen. In no specimen have I seen any 

 indication of the formation of secondary oscula or daughter persons. 



The type-specimen referred to above (PI. XXL, fig. 1 ; S. 

 C. M. Xo. 501, from Outside Okinose) is an exquisitely preserved 

 individual of the shape of a thick-walled, somew4iat laterally 

 compressed, tubular sac, gently swollen out on the sides. It is 

 attached to the substratum by an irregular basal mass, situated 

 on one side of the lower end and as usual in the sagittal plane 

 of the body. Total length, 365 mm. Breadth in the middle (ex- 

 clusive of the layer of prostals), 140 mm. sagittally and 120 mm. 

 transversely. Thickness of wall in the same position, 21 mm.; it 

 is much greater than in specimens of R. mollis of approximately 

 the same size. The oval osculum at the upper truncated end, 

 72 mm. by 107 mm. in diameter. 



In the peristomal region there exist numerous, fine, needle- 

 like oxydiactinic prostalia of variable length. They may project 



