On MuUusca collected at Spitsbergen. 499 



ridges extend to the beaks and for a short distance across the 

 rostral part, where they disappear and are rephiced by slight 

 transverse wrinkles ; the rostrum is short and separated from 

 the body by a strong flexuoiis keel or longitudinal rib, which 

 proceeds from the beak and ends below in a sharp point ; there 

 is also in some specimens another more or less distinct keel 

 between the rostral keel and the posterior side : colour whitish : 

 marqiiis gently sloping downwards from the beaks, rounded 

 on the lower part of the anterior side, curved in front, and 

 scalloped or indented between the keels or between the rostral 

 keel and the posterior side ; the point of the rostrum is 

 rounded : beaks small, incurved, but scarcely recurved : carti- 

 lage small, oblong, and yellow : lunule large, diamond-shaped : 

 liinge-line obtuse-angled : hinge-plate slight, thicker on the 

 anterior side near the beaks : teeth, none in either valve : inside 

 glossy, impressed by the ridges and rostral keels : scars incon- 

 spicuous. L. 0'25. B. 035. 



Station 16, 1785 fms. : fragments only. 'Porcupine' Ex- 

 pedition, 1870, off the coast of Portugal, 994 fms. Gulf of 

 Mexico, " off Rebecca," 290 fms. (Pourtales) ! 



The above description has been taken from a living spe- 

 cimen which I dredged in the ' Porcupine ' Expedition. The 

 short rostrum, angulated and separated by a longitudinal keel, 

 distinguishes this remarkable species from any of those which 

 are also concentrically ribbed. 



L. — List of Mollusca collected by the Eev. A. E. Eaton at 

 Spitsbergen during the third Voyage of B. Leigh Smithy Eq. 

 Stel. Pol., in the Greenland Sea. Determined by J. GwYN 

 Jeffreys, F.R.S. 



ClaSs Pteropoda. 



1. Clione papiUonacea, Pallas. Syn. CI. Umaclna, Phipps, itc. 



Ilab. Kings Bay, &c. 



2. Limacimi heVicina, Phipps. Hah. Common from North-Cape 



Island southwards, especially near the shore in bays. 



Class Gastropoda. 



3. EoVis, sp. ? TTah. On Alaria escuhnta, at Fair Haven, in 4-5 



fathoms. 



4. Bulla striata, Brown. Eah. Near the Seven Islands. 



5. BnrcinHin teneriim, Gray. Hah. Green Harbour. 



V). B. fjlaciate, Linn. Hab. Magdalena Bay and Green Harbour. 

 7. Adniete virkhda, Miiller. 



