1IKX \< TINKU.IHA 23 



The calycoeomes (V. 2h, h 1 ) are, on an average, about 225/i in diameter, the 

 priin.iry rays Unrig l)/x in length; each capitulum, G'75/i in length and 14'5/t in 

 l'iv;i-lfh. rnds in two to four roughened secondary rays tipped with button-like dinks. 



II. iiiidiscohcxastcrs (V. 2k, k 1 ), 100/* in diameter, occur but rarely ; the primary 

 rays end in one to three secondary rays tipped with disks having four to six long 

 recurved teeth. Fig. 21 shows an exceptional form, Dl/i in diameter, with thick 

 primary and secondary rays, the latter again dividing into two or three short 

 branches 



The mirrodiscohexasters (V. 2m) are 43/i in diameter, with primary rays 5 5/t in 

 length, and with a convex capitulum, whence about six disk-tipped secondary rays arise. 



Winter Quarters : (1) one specimen (A), the type, and a fragment (B), February 28, 

 1902, McMurdo Bay, 36 m. (20 fins.) ; (2) a small specimen (C), No. 4 hole, January 

 30, 1902, 75 m. (41 fms.) ; (3) a fragment (D), No. 12 hole, September 8, 1903, 

 45-55 ra. (25-30 fms.). 



SUB-FAMILY LANUGINELLIN.*. 

 ANOXYCALYX. 



Lanuginellinae without Oxyhexasters, with Graphiocomes. 



ANOXYCALYX IJIMAI. 

 (Plate III., fig. 7, and Plate VII., figs. 2-2g'.) 



Sponge in form of a small compressed pyriform sack, with the surface studded 

 with small conules and small flattened pyriform buds. With slender tufts of long fine 

 diactin pleura] ia and basalia. The orifice narrow and oval, with a plain rim, and 

 without marginalia. Autodermalia stauractius (mainly) and pentactins, with the odd 

 ray proximal, more rarely tauactins and angular diactins ; hypodcrmal pcntactins 

 confined to the conules ; autogastralia hexactins, with large microdiscohexosters, with 

 graphiocomes, and very large strobilocomes. 



The largest of the three small specimens is 2 2 cm. in the length of the body, and 

 7 '5 cm. in total length, i.e., including the plcundia ; the greatest width is 1'7 cm. 

 and the thickness 7 mm. ; the slit-like orifice is 4 mm. in width. The largest buds 

 attain a length of 2 mm. 



The skeleton is mainly formed of bundles of diactins. 



Spicules. The diactin principalia of the bundles are very slender, wavy, 

 tapering to fine points, and roughened at the ends ; a much thicker kind are isolated, or 

 with slender comitalia. PI. VII., fig. 2a, shows a parenchyma! triactin'x 150. The 

 slender wavy pleuralia attain a length of 5 cm. 



The autodermalia are chiefly stauractins (VII. 2b), with each ray 234 x 12/i, 

 slightly spined, curved inwards, rounded at the end ; occasionally these spicules have 

 thick club-like rays (VII. 2b 4 ). 



