9? 



Another specimen of the size of a fist, similar to the one representerl in 

 fig. 1 on plate XVI, consists of 6 pretty normally developed calices a finger 

 long, the walls of which bear a considerable number of hollow, digitate divertic- 

 ula, 3-5 mm. broad and 10-20 mm. long. Although these diverticula, which 

 increase in size towards the upper end of the sponge, are situated somewhat irre- 

 gularly, one can easily discern an indication of an arrangement in transverse and 

 longitudinal rows. In each verticillary, transverse row there are about five 

 diverticula. The intervals between the diverticula of each verticil increase in 

 width towards the upper end of the sponge, where they are 10 mm. wide. It is 

 also to be noticed that the calyx-wall tends to form five longitudinal, projecting 

 folds, which correspond to the five indistinct longitudinal rows of diverticula. 



Some of the diverticula are dichotomously divided, most of them are how- 

 ever simple and straight or slightly curved. In some a terminal, circular aper- 

 ture is observed which has obviously been produced by a secondary local resorp- 

 tion of the apex. Nearly all the diverticula reach other diverticula belonging 

 to different calices and impinge on them either terminally or laterally, where- 

 upon they grow together. Thus all the calices are firmly united to form a solid 

 continuous structure. Each calyx has one or two transverse sieve-plates which 

 however are not regularly placed in the interstices of the verticils of diverticula. 

 Sometimes such a sieve-plate does extend between two consecutive verticils, 

 sometimes however it is attached to the wall of the calyx at the level of 

 the entrance to a diverticulum, in which case the communication between the 

 cavity of the latter and the central cavity of the calyx is made possible by the 

 formation of a marginal hole in the sieve-plate. 



Concerning the microscopic structure of the skeleton and 'the soft parts I 

 have observed nothing new in this specimen. The state of its preservation 

 precluded any closer investigation. 



This specimen was found in the Andamans, 13° 17' N. 93° 7' E. in a depth 

 of 165 m.=90 fths. Some macerated, smaller fragments of similar calices 

 were found South- West of Cape Comorin, 7° 17' 30" N. 76' 54' 30" E. in a depth 

 of 787 m. = 430 fths. and some other fragments near the Andamans in depths of 

 238-458 m. = 180-250 fths. and 436-531 m.=288-290 fths. 



Aphrocallistes ramosus F. E. Sch. 

 Plate XV, fig. 14. 



1886 AphroealUstea ramosus F. E. Schulze in Abh. Preoss. Ak. 1886 pp. 75, 76. 



1887 F. E. Schulze, Challenger Hexaotinellida p. 319. 



1895 F. E. Schulze in Abh. Prensa. Ak. 1895, p. 76, Taf. VII, fig. 14. 



The species Aphrocallistes ramosus described by me in the Abhandlungen 

 der Berliner Akademie for 1886 and in the Report on the " Challenger" Hexact- 

 J3 



