118 Canon A. M. Norman — Notes on the 



56. Escharella immersa (Fleming). 



1828. Berenicea immersa, Fleming, Hist. Brit. Animals, p. 533. 

 1847. Lepralia Peachii, Johnston, Hist. Brit. Zoophytes, edit. ii. p. 315, 

 pi. Iv. figs. 5, 6. 



To remove any doubt as to this synonymy, I may state 

 that I haA^e examined Johnston^s specimens of Lepralia im- 

 mersa in the British Museum, and they are undoubtedly the 

 same as his L. Peachii. 



Taken at Nordkyn [Nordgaard). 



57. Escharella abyssicola (Norman), 

 Svierholt (Nordgaard). 



58. ^' Mucronella" sincera (Smitt). 



1867. Discopora sincei'a, Smitt, " Kritisk Forteckning, &c." p. 28, 

 pi. xxvii. iigs. 178-180. 



1876. Discopora siyicera, Norman, ' Valorous ' Report, Proc. Roy. Soc. 

 vol. XXV. p. 208. 



1877. Lepralia sincera, Hincks, " Polyzoa Iceland and Labrador," 

 Ann. &Mag. Nat. Hist. ser. 4, vol. xix. p. 102, pi. xi. tig. 2. 



1880. Hemeschara sincera, Busk, " Polyzoa North Polar Exped.," 



Journ. Linn. Soc, Zool. vol. xv. p. 237. 

 1880. Mucronella sinqylex, Hincks, " Hydrozoa and Polyzoa of Barents 



Sea," Ann. & Mag. Nat. Hist. ser. 5, vol. vi. p. 280, pi. xv. tig. 7. 

 1900. Miccroiiella sincera, Nordgaard, Norwegian N. Atlau. Exped. 



xxviii. Polyzoa, p. 14, pi. i. tigs. 13-15. 



Bog Fiord, East Finmark, in 120 fathoms {A. M. N.) ; 

 Svnerholt {Nordgaard). Other specimens in ray collection 

 are from Spitsbergen [Smitt); oft' Hare Island, Waigat 

 Strait, Greenland, 175 fathoms ('Valorous,' 1875;; also 

 Greenland (Copenhagen Museum), and Proven, Greenland 

 (Smitt) ; and the form Mucronella pralucida, Hincks, Gulf 

 of St. Lawrence (Whiteaves) . 



The oral opening is subject to considerable variation; the 

 lower lip is often more or less produced, commonly evenly 

 (see Nordgaard^s figure 15), more rarely acutely (as Nord- 

 gaard, figs. 13, 14), and the last condition seems to be the 

 Mucronella simplex, Hincks, and hence it has been placed by 

 himself and Nordgaard in the genus Mucronella ; but with 

 this genus it has no connexion, for the oral point is a mere 

 projection of the margin, and, as Hincks himself wrote, '' the 

 oral denticle is wanting. ^^ The form of the oral opening is 

 also subject to considerable variation. In zocecia without 

 ooecia the outline is circular or subcircular, but in other 

 cases (Spitsbergen examples) it is nearly of the form assigned 

 by Hincks to his genus Lepralia. Oral spines arc unknown. 



