. 93 



These specimens of Aphrocallistes heatrix, which are all very similar to each 

 other, were found in the Andamans, to the west of North Sentinel Island, in a 

 depth of 238-458 m=130-250 fths. 



There are, besides these specimens, two completely macerated skeletons of 

 Aphrocallistes beatnx in the " Investigator " collection, in both of which, the 

 doubtless funnel-shaped base is missing. One of these is caliculate, 3 cm. long, 

 10 mm. broad below and 24 mm. above. It has an upper and a lower sieve-plate 

 and is broken off just below the latter, which therefore appears partly to close the. 

 calyx-cavity below. The upper sieve-plate i^ in this specimen depressed in the 

 centre, funnel-shaped and not flat. Above, the sponge is not torn, but terminates 

 with the natural sharpened margin. The lateral diverticula of the calyx-wall 

 are arranged in 8-10, pretty irregular longitudinal rows ; they are mostly quite 

 low, measuring only 3-5 mm. in height, and hemispherical. Near the apex there 

 is, on the lower side, generally a circular perforation. Only at the lower and at 

 the upper end, just below the margin of the calyx, a few longer diverticula are 

 met with, some of which are terminally still closed, while others are perforated 

 near the end or broken off. 



The other specimen is more tubular, 4 cm. long, 8 mm. broad below and 15 

 mm, above and has only one sieve-plate which is situated some distance above the 

 lower, torn end. The upper end has been broken off. The diverticula of the 

 wall of the calyx are arranged in indistinct, longitudinal and transverse rows and 

 also quite low, only 3-5 mm. high. Nearly all are perforated by a circular aper- 

 ture on the lower side. Some of the diverticula, which are now however broken 

 off, seem to have been longer. 



The first of these specimens was found near the Andamans, 13° 15' N., 93° 

 10' E. in a depth of 362 m=198 f ths ; the second also in the vicinity of the 

 Andamans, but in a depth of 436-531m=238-290 fths. 



Aphrocallistes bocagei Perc. Wright. 

 Plate XVI. 



1870 Aphrocallistes locagei Pero. Wright in Qnart. Journ. Micr. Sci. Vol. X, p. 77, pi. I. 



1887 ■ F. E. Schulze "Challenger". Hexactinellida p. 305, pi. 83-86. 



1895 F. E. Sehulze in Abh. PrenBS. Ak. 1895, p. 78—82, Taf. VIII. 



1900 F. E. Sohulze in Abh. Prenss. Ak. 190O, p. 39-41. 



Some of the Aphrocallistes collected by the " Investigator" so closely agreed 

 in size and shape with the typical Aphrocallistes bocagei described by Perc. 

 Wright in 1870 in the Quarterly Journal of Microscopical Science, Vol. 10, p. 73 

 that there can be no doubt about their belonging to the same species ; others 

 however are not quite po similar to it and at first it appeared by no means 



