Natural History of East Finmark. 121 



well as one of larger size and acute mandible ; but tlie most 

 important dift'erence is the form of the oral opening, which 

 in this northern form, whether it be tubular or encrusting, 

 is wider below than above and has a straight underlip. 



In my cabinet are specimens from off Disco, Greenland, 

 100 fathoms {' Valorous,' 1875) ; Gulf of St. Lawrence 

 ( IVhiteaves) ; Cashes Ledge, N.E. America ( Verrill, as "Escha- 

 rella Jacotini"). 



I am indebted to Smitt for a specimen of his var. lamel- 

 losa from Spitsbergen, which certainly has not the characters 

 of the foregoing form, nor does d'Orbigny's figure (Pal. 

 Frany. Cret. pi. dccxxii. tig. 1) of his Semieschara lamellnsa, 

 to which Smitt refers, bear any resemblance to it ; it is wholly 

 without avicularia. 



62. Smitiina arctica, Norman. 



1869. Escharella porifern, forma majuscnla, Smitt, " Krit. Fcirteck. &c." 

 pt. iv. p. f), pi. xxiv. tigs. 36-38, and forma jninuscula, figs. 33-35. 



1888. Snnttia La7idshorovii, form porifera, Hincks, " Polyzoa St. Law- 

 rence," Ann. & Mag. Nat. Plist. ser. 6, vol. i. p. 225, pi. xiv. fig. 2. 



1894. Stnittia arctica, Norman, " A INIouth on the Trondbjem Fiord," 

 Ann. & Mag. Nat. Hist, ser. 6, vol. xiii. p. 128. 



1895. Smittia arctica, Nordgaard, " System, ftirtegn. Norge Marine 

 Polyzoa," Bergens Mus. Aarbog, no. 2, p. 27, pi. i. lig. 2. 



1900. Smittia Landshurovii, var., Waters, " Bryozoa Franz-Josef Land," 

 Joiun. Linn. Soc. Zool. vol. xxviii. p. 90, pi. xii. fig. 7. 



This is a very pretty form, the front wall regularly punc- 

 tate all over; the avicularium on or just below the lower 

 lip of the oral opening with round mandible and a very 

 slender lyrula behind it, which, however, can seldom be seen 

 except on young specimens ; sides and upper lip of oral 

 opening raised ; the ooecium, which is imperforated, generally 

 but not always falls back from the raised upper margin of 

 the oral opening. 



I do not understand the transverse and circular lines which 

 Nordgaard represents on the ooecium ; Waters's figure is 

 characteristic, but the upper lip and the attachment of 

 ooecium are rather more marked in their special character 

 than usual. 



On an annelid tube in Bog Fiord in 100-120 fathoms. 



63. " Smittia'' porifera (Smitt). 



1867. Escharella porifera (typica), Smitt, " Kritisk Forteckning, &c." 



p. 9, pi. xxiv. figs. 30-32. 

 1877. Ze/jr«/j« ;w/v/e/-a, Hincks, " Polyzoa of Iceland and Labrador," 

 Ann. & Mag. Nat. Hist. ser. 4, vol. xix. p. 102, pi. x. figs. 1, 2. 



