some new and peculiar MoUusca. 491 



This is probably the unnamed bivalve No. 8 in Mollcr's 

 Index, p. 24. 



My description and iigure were taken from dead specimens 

 whicJi the late j\Ir. Robert Dawson of Cruden dredged in the 

 Moray Firth ; but these may be semifossil or relics of the gla- 

 cial ej)0ch, like Pecten islundicus^ Astarte depreHsa {A. cribre- 

 cosfafa, Forbes, = J. lik'hardsonij Keeve), TelUna calcaria, 

 and several other arctic shells which have been dredged on 

 the coasts of Scotland. In St. -Magnus Bay, Shetland, I 

 dredged Leda permda, L. abi/ssicohi, and L.ji'iijlda (= Yoldia 

 nana^ Sars) in a fresh state ; and I also dredged L. arctica 

 { = Nucxda truiicata, Brown, =-lY. jwrflandica, Hitchcock, = 

 N. siliqna and N. sidci/era, Keeve) among the Hebrides, It 

 is very difficult to say whether some of the above do not at 

 present inhabit our northern seas. 



Kellia s7/mmetros*, Jeffr. 



Shell triangularly oval, equilateral, compressed but not 

 flat, transparent, and glossy : sculj^ture, none except micro- 

 scopic and slight lines of growth : colour glassy or clear 

 white : mar(jins sloping equally from tlie beaks, rounded on 

 each side, gently eui-ved in front : heaJcs circular or calyci- 

 form, prominent, incurved but straight : cartilage small, tri- 

 angular, placed between the hinge-line and lateral tooth on 

 the posterior side : hinge-line obtuse-angled : hinge-plate nar- 

 row but strong : teeth, in the right valve two short laminar 

 laterals ; in the left valve a strong oblique and projecting car- 

 dinal and two laterals ; one of the laterals in each valve is 

 slight : inside pit-marked : scars indistinct. L. 0*04. B. 0"05. 



Station 9, 1750 fms. ; a single living specimen. 



The very young of K. suhorbicularis of the same size as this 

 is more globular ; its beaks are not prominent ; and the teeth 

 are different. 



Axinus cycladius, S. V. Wood. 



Kellia cycladia, Mon. Crag Moll. p. 122, tab. xi. f. 4 a, h. 



I'(nom>/a stthfn'(/oita, Jefl'r. Ann. & Mag. Nat. Hist. 3rd ser. Jan. 1858, 



p. 42, pi. ii. f. 1. 

 Kellia? (ijclailia, British Concliology, vol. i. p. 228; vol. v. p. 170, 



pi. xxxii. f. 3. 



Station 9, 1750 fms. ; one living specimen. Shetland, 60- 

 90 fms. (J. G. J.). 'Porcupine' Expedition, 1869, off the 

 north-western coast of Ireland, 1366 fms. ; 1870, Bay of 

 Biscay, 386 fms. Mediterranean, 30-120 fms. (Spratt, Acton, 

 Nares, Carpenter, and Monterosato) ! 



* Symmetrical. 



33* 



