116 MR JAMES COSMO MELVILL AND MR ROBERT STANDEN ON THE 



Philobrya wandelensis, E. Lamy. 

 Philobrya wandelensis, Ed. Lamy, Exp. Ant. Franc ( . Charcot, 1903-5, p. 16, pi. i., figs. 15, 16. 



Hob. Scotia Bay, South Orkneys. Dredged, 6 fathoms, February 1, 1904. 



Modiolarca mesembrina,* sp. n. (Plate, figs. 15, 15a). 



M. testa parva, ovato-trapezoide, nigro-brunnea, tenui, convexa, eequivalvi, inaequilaterali, umbonibus 

 prominulis, paullum incurvis, obliquis, interdum partim erosis, superficie omni epidermide nigrescente contecta, 

 sub lente radiatim longitudinaliter decorata, antice compressa, posticd rotundata, dente cardinali in utraque 

 valva prsedita, pagina interna brunnea. 



Alt. 4, lat. 4, diani. 2 mm. 



Hob. Shore, Port Stanley, Falkland Islands. 



We cannot exactly match this with any of the known species. 



Order PSEUDOLAMELLIBRANCHIATA. 



Family Pectinidss. 

 Pecten colbecki, Smith. 



Pecten colbecki, E. A. Smith, "Southern Cross" Ant. Exp. (1902), Brit. Mus. PubL, p. 212, 

 pi. xxv., fig. 11. 



Hob. Lat. 64 48' S., long. 44 26' W., at 2485 fathoms, March 13, 1903. 



Fragmentary portions of the left valve only, the equal auricles being perfect, and a 

 great part of the central superficies. This valve is flattened, and exhibits about fifteen 

 ribs, somewhat uneven. There is uniform, close concentric stria tion. Colour, cinereous 

 white suffused with dull rose-pink, with purplish tinge. Mr EDGAR SMITH described 

 this species from a single right valve. The substance is so thin and papyraceous that it 

 can be bent to a certain extent without injury. 



Pccten multicolor, sp. n. (Plate, figs. 21, 21). 



P. testa delicata, mediocri, tenui, inequilateral!, aequivalvi. planato-convexiuscula, variis coloribus ornata, 

 nune flavida, mine pallidcS violacea, interdum rufescente, vel alba, interdum pulchre' maculata, auriculis valde 

 insequalibus, posticis radiantibus, radiis arct6 squamatis, anticis tenui-costatis, Eeque^ squamatis, valva sinistra 

 costis ad 22, Isevibus, in statu juvenili pulcherrime squamatis, deinde Isevissimis, paullum irregularibus, 

 interstitiis 5-seriatim arctissimd scobinatis, asperulatis, valva dextra costis arctis ad 50, interstitiis interdum 

 planatis, interdum una serie squamarum scobinata decorata, umbonibus acutis, subhevibus, pagina interua 

 radiatim sulculosa. 



Alt. 21, lat. 19, diam. 5 mm. spec. maj. 

 . 16, 14, ,, 3 min. 



Hob. Gough Island. 



A very delicate Pecten, variously coloured, in which the ribs and interstices of the 



* /tfaffifjpu'os, southern. 

 (ROY. soc. EDIN. TRANS., VOL. XLVI., 146.) 



