BY E. F. KALLMANN. 



439 



or less rounfU'd off at tlic apex and occasionally pass into more 

 or less abbreviated stn^ngyla ; 

 both kinds are (usually not much) 

 curved, especially in their basal 

 moiety. The tylostyli, which are 

 seldom, if ever, less than 950 fi 

 long, are of very varying stout- 

 ness, and have the bulb less pro- 

 nounced in proportion as they 

 are stouter; between tylostyli and 

 styli of the same length, there 

 are all intermediate gradations. 

 The styli are always proportion- 

 ately stouter than the tylostylij 

 and range in length from about 

 450 to 2800 /x ; their maximum 

 diameter is 28 /x. 



(6.) The acanthostyles are 

 straight, conical spicules, measur- 

 ing at most 12-5 /x in stoutness, 

 and varying from 80 to upwards 

 of 190/x, though rarely exceeding 

 150 /i in length. The spines are 

 recurved, generally between 2 

 and 4 /x in height, and nearh^ 

 always are more or less reduced 

 in number over portion of the 

 basal half of the spicule. 



(c.)The auxiliary spicules are 

 styli and asymmetrically-ended 

 oxea, straight or slightly curved, 

 the latter comparatively few in 

 numVjer and, on the average, 



shorter and slenderer than the fiaspailia ayminata. a, a'.Piincipai 

 styli. They measure from 245 to «Pi^"!e«. «tyli and tylostyli with 

 •^ A • occasional sub.stroiigvla. a .Basal 



about 400/Min length, and seldom ends of principal spicules. h,Aciiu- 

 as much as 6 u in stoutness. thostyli. r Auxiliary oxea and 



styli. c', Ihe same drawn to a 



Loc— Port Jackson. larger scale. 



Fig.2i 



