KEPORT ON THE LAMELLIBRANCHIATA. 293 



I cannot agree with the hitc Di-. Gwyu JeftVeys in considering this species the same 

 as the Crag fossil Lima ocata of Searles Wood. That is a differently shaped shell, more 

 strongly ribbed down the middle of tlie valves, entirely or almost wholly destitute of 

 lirfe at the sides where the margins are even ami not serrate, and strongly dentate 

 within the ventral outline. Jeffreys gives the number of ribs at " about 50." Should 

 this be 30 ? For in two valves received by the British Museum from liini from the 

 " Valorous " expedition I find that number. 



Lima (Limatula) sp. 



Habitat. — Station 104, Mid Atlantic, south-west of SieiTa Leone, in 2500 fathoms. 



A single specimen, which is too damaged for description, apparently belongs to a new 

 species. It is of small size (5 mm. high), of an elongate, narrow form, excessively 

 thin, glossy, and sculptured with numerous very fine hair-like radiating lirse, which 

 produce dentate margins to the valves, and rather conspicuous lines of growth, giving 

 the surface a more or less cancellated appearance. 



Lima {Limatula) sp. 



Habitat. — Station 317, north of tlie Falkland Islands, in 1035 fathoms. 



The single sliell obtained at this Station may be a more mature example of the species 

 from Station 104. It is thicker in texture, more strongly lirate, and not so pointed 

 beneath. It also closely approaches Lima subovata, but is ornamented with a coarser 

 (!ancellation, has less prominent umbones, and is more rounded at the A^entral margin. 



Lima (Limatula) s]). 



Habitat. — Off Nightingale Island, Tristan da Cunha, in 100 to 150 fathoms. 



A single minute valve from this locality approaches very closely Lima subovata, but 

 may be distinct. It is not quite so convex, not so pointed beneath, and has rather fewer 

 radiating lirae. The interior exhibits three thread-like lirse down the centre, with grooves 

 between them which terminate on the margin in little denticles. It may be the young 

 state of the species from Station 317. 



Linm {Limatula.) laminifem, n. sp. (PI. XXIV. figs. 7-7a). 



Testa parva, tenuis, pellucida, ovata, .superne truncata, secjuilateralis, mediocriter 

 eonvexa, laminis concentricis tenuibus numerosis, lirisque paucis obsoletis prope 

 medium instructa. Linea cardinalis gracilis, Isevis. Area ligamenti angusta, fossa 



