260 Kl-X'OKDS OF THE AUSTKALIAX MUSEUM. 



Phreodkiloides, yeii. iiov. 



Kesembling Phvpodrilns, Beddarcl, but without a spennatheea. 

 The sperm cluet opens into a muscuhir, but uon-glauduhir sac, 

 containing spermatozoa, wliich opens to the exteiior in seg- 

 ment xii. 



Phreodkiloides xoTAniLis, ><p. tior. 

 (Pkte xlvii.). 



Only a single individual of this very interesting worm was 

 received, but fortunately it was sexually mature. It was, after 

 examination in gh^cerine, stained and mounted in Canada balsam ; 

 later it was unmounted, and the anterior end cut into sei-ial 

 sections. 



Dimensions. — It is altogether shorter and more slendei- tlian the 

 preceding ; it was coiled in a flat spiral at each end, so that the 

 length here given is only approximate!}' correct, viz., 8 mm. The 

 body wall is very glandular ; the glands are in two distinct 

 annular groups in each segment, that is, each segment is bianiiu- 

 late, of which the larger occupies the greater part of a segment, 

 and a mucli narrower one lies near the posterior intersegmental 

 furrow. 



Ch(et(i'. — The ventrals commence in segment ii., and the dorsals 

 in iii. (as in Btlireodrilus). The ventral bundle normallj^ contains 

 a single chai^ta, which is a simple-pointed sigmoid, Avith very feebly 

 expressed nodulus (PL xlvii., fig. 13). But in a few segments I 

 noted two such cluette. These ventrals measure 0-05 mm. 



The dorsal ciuetje are entirel}' capilliforms, and there a])pear to 

 be two in each bundle, one longer and thicker, one shorter and 

 finer. This is certainly the case in segments iii. and iv., but 

 unfortunately the rest were broken, the anterior end being- 

 protected by its curvatui'e retained tiiem when mounted in 

 glycerine. After manipulation, however, I found that e\en tliese 

 had been broken. I failed to measure them, but the longer 

 chcvta was rather greater than half the diameter of the body. 



A careful study of transverse sections shows that each of the 

 subsequent segments contain bases identical with that of these 

 tvvo segments, i.e., the inner end is abruptly truncated, there is no 

 nodulus, and the embedded portion is straight — all characters of 

 capilliforms. Clnette are absent in segment xii., and there are no 

 copulatory ch;et;e. 



The CliteUnni commences at al)out the middle of segment xii. 

 and surrounds segment xiii., liut only a \^v\ short portion of the 

 ventral surface is glandular. 



The male pore is situated near the anterior margin of segment 

 xii , ratlier mediad of the line of the ventral cha^tse. There is no 

 spermathecal pore. 



