A -MASSY i". 1 :. 



would appear to be inure or less coalescent with the proboscis, instead of being five through- 

 out must uf their length. The specimen has nu external genital organs as in the type, 

 but this seems to In- an abnormal state occurring sometimes in various speeies ot' rterota 

 (Tesch, 1904, p. 73; .Massy. l ( .) I 7. p. _':'. 1 *). The lateral gill has two crests without 

 firinges and the posterior gill has four small eivsts. The fact that then- are at least 

 fifty suckers on each appendage instead of forty as in /'. rinfin-i inn, d'< >rb. seems to 

 render it advisable to refer the specimen to this speeies. Kwietniewski ( I '.)<)2, p. l. : i) 

 mentions that in the Mediterranean examples of /'. rin/in-f/ini whieh lie has stu<lieil. 

 specimens of :! 4 mm. in length (excluding the proboscis) possess ten to fifteen 

 suckers on each arm, and that larger individuals of 5 (i mm. possess about twenty, 

 and that adult, or almost adult examples of the largest specimens (S mm.) gathered by 

 him possess about thirty-five stickers on each arm. The ventral aspect of the present 

 specimen is shown in figure 7. 



IHxtrilintion. 36 52' N.. 39 55' W. Surface. Type specimen (I'.onnevie. 1913). 



:!. Spongiobranchaea australis, d'Orbigny. Figs. 8, 9. 



" CliiiiUlu i-iiilin-i'iis,'' Quoy and Gaiinard, 1825. 

 Spongiobranchaea nuxtrulin. d'Orliijjny, 1S40. 



New Zealand to Antarctic Circle. Antarctic (Ross Sea and neighbourhood). 



Station 235, eleven. 

 240, one. 

 251, eight. 

 ,, 250, one. 



Station 2G9, one. 



270, (0 two. 



323, one. 

 "Discovery" Collection. l'.X)l- 



11)04, Nov. 12, 1901. one. 



These measured from 2'50 mm. to 16 mm. The largest specimens were usually 

 taken in December and the smallest in March hauls. The smallest specimen, 2'50 mm. 

 in length (Station 240), possessed an exteiual genital gland, but the radula proved to 

 be that of the present species. All the specimens examined possessed seven or eight 

 suckers on each arm. They were on very short stalks and became much larger distally. 

 The example from (.'ape Evans had one arm exserted, Imt the specimen, although 

 apparently in perfect condition, had a flaccid and more transparent appearance than 

 the other examples. An examination proved that it had lost all its internal 

 organization except the above-mentioned arm. Probably the jaws being widely 

 everted in the effort to capture prey some larger animal came along and snapped up 

 both jaws and prev. and the jaws bein^ caught [Hilled the stomach, etc.. out ot the body. 

 This whole mass of organs is usually very firmly connected, and can generally be gol 

 out for examination, without injuring the appearance of the specimen, by making a 



Si-.- ;l ]si> [iM'-i-iit ]>:i|ifr under .S'. mixti'iilif, |>. 225. 



