164 THE VOYAGE OF H.M.S. CHALLENGER. 



meyeri. This was further proved by the examination of a hxrge sj^ecimen of the same 

 form, preserved in the Zoological Museum at Dresden, which I was allowed to study 

 through the kindness of Hofrath A. B. Meyer. 



I also found a di-ied specimen of Crater omorpha meyeri among the sponges which 

 Dr. Doderlein collected at Enosima in Japan. 



2. Crateromorpha thierfelderi, n. sp. (PI. LXII. figs. 1-4). 



The stalked cup-shaped form, represented in its natural size in PI. LXII. fig. 1 , was 

 trawled near the Little Ki Island (Station 192), from a depth of 129 to 140 fathoms, and 

 a blue mud bottom. It measures 10 cm. in total length, and 4 "5 cm. in maximum 

 breadth. The bulb-like or thick spindle-shaped body is 5 cm. long, and exhibits a 

 simple bulging gastral cavity, about 2 '5 cm. in width, opening superiorly, by a circular 

 osculum 15 mm. broad, and continued inferiorly into the lumen of the stalk. The stalk 

 is from 6 to 8 n^n. in breadth. The lower end of the latter and a large piece of the 

 upper waU of the body have unfortunately been torn away. In its bulging portion the 

 wall is about 8 mm. in thickness, but it decreases rapidly towards the upper end, ending 

 finally in a short, thin, smooth, projecting fringe. Inferiorly, on the other hand, the 

 thickness of the body- wall decreases to about 3 mm. as it joins the stalk. 



WhUe the external surface of the sponge appears smooth, the internal surface exhibits 

 numerous round apertures, belonging to the efferent canals. These pores vary in width 

 up to 5 mm. 



The parenchyma contains besides strongly developed slightly curved diacts (PI. LXII. 

 fig. 4) and medium-sized hexacts, also numerous oxyhexasters, with terminal rays bent 

 gently outwards (PL LXII. fig. 2). Besides these, there are small comparatively regular 

 discohexasters 0'05 mm. in diameter, with five to eight equal-sized terminals on each 

 principal ray (PI. LXII. fig. 3). 



The dermal membrane contains rough tetracts, and less frequently similar pentacts, 

 with a more or less strongly developed internal ray. In the gastral membrane only 

 roughened pentacts occur. 



I have named this form in honour of my friend Professor Albert Thierfelder of 

 Rostock. WhUe it presents a certain resemblance to Crater omorpha meyeri, it is also 

 very closely allied to Crateromorpha murrayi about to be described, and occupies in fact 

 an intermediate position between these two species. 



3. CrateroTuorpha murrayi, n. sp. (PI. LXIIL). 



In the vicinity of the Little Ki Island (Station 192), from a depth of 129 to 140 

 fathoms and a blue mud ground, the trawl brought up, along with numerous other 



