i86 ■ DISCOVERY REPORTS 



Remarks. All these examples are in poor condition. The largest measures 28 mm. 

 by 2 mm. at the widest part. Some have four teeth only in the hooks of the biserial 

 thoracic tori and five teeth in the abdominal hooks : in others there is a small 5th tooth 

 apically in the hooks of the biserial thoracic tori and a 6th tooth in the abdominal hooks. 

 Willey (1905, pp. 302-304) separates L. ?nedusa from L. variegata (Grube) on the 

 ground that the former species has four teeth only in the hooks of the biserial thoracic 

 tori and five in the abdominal hooks, and L. variegata has an additional tooth in the 

 thoracic and abdominal hooks respectively. In view of the variation in the number of 

 uncinal teeth in the present examples, I cannot believe that this alone constitutes a 

 specific distinction. Grube, however, states that L. medusa and L. variegata are 

 difi^erently coloured. Fauvel (loc. cit.) figures four to five uncinal teeth for his L. medusa 

 and Augener (191 8, p. 540) records five to six uncinal teeth. 



In the biserial tori the hooks are set back to back. The present material is unsuitable 

 for an accurate estimate of the number of gland shields, but there appear to be about 

 eleven. L. montagui has about eight scutes. 



Loimia montagui (Grube). 



Willey, 1905, p. 303, pi. vi, figs. 160-163, with synonymy. 



St. 270. 27. vii. 27. 13° 58' 30" S, 11° 43' 30" E. 200 (-0) m. Gear TYF. Two specimens. 

 i26(-o)m. Gear N 100 B. One specimen. 



Remarks. The largest specimen measures 15 mm. by 2 mm. As in L. medusa the 

 2nd segment sends forward two large foliaceous lobes that fuse in the mid-ventral line. 

 The 3rd segment has a pair of thick triangular lateral lobes. There are eight ventral 

 gland shields. The biserial thoracic tori have the hooks set back to back. The thoracic 

 hooks have six teeth and the abdominal seven teeth. On each side above the notopods 

 is a white glandular tract, extending from the gill region to the 8th chaetiger. It 

 probably corresponds to the path of the large tube joining the nephridia. 



Both Fauvel and Augener have recorded L. medusa from tropical West Africa. 

 L. montagui is easily distinguished by the larger number of teeth to the hooks. I 

 believe this to be the first record of this tropical species from Atlantic waters. I suspect, 

 however, some error in the locality label, for this indicates that these specimens were 

 pelagic. Many Terebellids have pelagic larvae, but the present examples are small but 

 not larval, being in all respects fully formed, and I am unable to account for their 

 presence among the plankton. 



Genus Pista, Malmgren 

 Pista mirabilis, Mcintosh. 



Mcintosh, 18S5, p. 454, pi. li, figs, i and 2; pi. xxvii A, fig. 34. 

 Scione mirabilis, Benham, 1921, p. 85, pi. ix, figs. 97-100. 

 Pista mirabilis, Benham, 1927, p. 99, with synonymy. 



St. 170. 23. ii. 27. Off Cape Bowles, Clarence Island. 61° 25' 30" S, 53° 46' 00" W. 342 m. 

 Gear DLH. Bottom: rock. Five specimens. 



