142 PROCEEDINGS OF THE ACADEMY OF 



losa Spengler. T. proximo, Brown. Sanguinolaria sordlda Gould, Inv. Mass. p. 

 67. N. W. coast of Greenland. 



52. Astarte elliptica Macgillivray, Moll. Aberd. 259. Crassina elUpiica 

 Brown, Ulust. Conch. G. B., pi. xviii., f. 3. N. W. coast of Greenland. 



53. Astarte plana J. Sow., Min. Conch, pi. clxvix., f. 2, 1817. Venus borealis 

 Cbemn. (non Lin.) . Crassina corrugata Brown. Astarte lactea Brod. & Sow., 

 Gray, App. to Beechey's Voy., Zool., 152, pi. xliv., f. 19. Port Foulke. 



54. Astarte striata Gray, Beechey's Voy., Zool., p. 152, pi. xliv. f. 9. Ni- 

 cania striata Leach. West coast of Greenland. 



55. Cardium (Serripes) groeslandicum Chemn. West coast of Greenland. 



56. Cardium Hayesii, nov. sp. Near C. islandicum. Shell rather thick, ele- 

 vated ; beaks prominent; ribs acute, 33 to 35. Witbin yellowisb ; teeth strong ; 

 liganaental fulcrum short, so that the little notch indicating its posterior extrem- 

 ity is situated about the middle of the distance between the cardinal and tbe 

 posterior lateral teeth. Inner margin strongly crenated throughout, as well on 

 the posterior margin as on the inferior and anterior ones. 



In this short description we have given only the characters which distinguish 

 the species from its nearest allies, all of which inhabit the same seas. C. 

 islandicum has more numerous ribs, a thinner shell, less prominent beaks, and 

 a weaker hinge. C. arcticum Sow. has less numerous ribs. C. Dawsoni is more 

 oblique, with a much thinner shell and weaker teeth. Cardium interruption 

 of the English crag is less tumid, less oblique, and more pointed behind. C. 

 Hayesii also.differs from all these species in the shortness of the ligamental ful- 

 crum. 



Of this shell two specimens were taken by Dr. Hayes at Disco Island. One 

 measures 0.88 inch in height by 0.9 inch in length; the other 1.6x1.75. 

 With age it shows a tendency to become more compressed and expanded 

 about the margins. I have received the same shell from Nova Scotia. 



57. Leda minuta Moll. Area minuta, Mull. , 0. Fabr., etc. West coast of 

 Greenland. 



58. Modiolaria laevigata Loven. Modiola Isevigata Gray, App. to Parry's 1st 

 Voy., p. 244. Mytilus discors 0. Fabr., non. L. West coast of Greenland. 



59. Crenella faba. Mytilus faba 0. Fabr., F. G., p. 419. Modiola peclinula 

 Gould. N. W. coast of Greenland. 



60. Mytilus edulis Lin. Godhavn. 



61. Pecten islandicus Mull. West coast of Greenland. 



ECHINODERMATA. 



62. Pentacta frondosa. Uololhuria frondosa Gunner. Godhavn. 



63. Chiridota laeve Grube. Holothuria Imvis 0. Fabr. Godhavn. 



64. Myriotrochus Rinkii, Steenstrup, Videusk. Meddel. fra den Naturh.For- 

 ening, 1851, 55, tab. iii., f. 7-10. Port'Foulke. 



65. Asterias groenlandica. Asteracanthion groenlandicus Steenstrup. Port 

 Foulke. 



66. Asterias albula. Asteracanthion albulus. Stimpson Asteracanthion pro- 

 blema Steenstrup. Port Foulke, Godhavn. 



67. Ophioglypha squamosa. Ophiura squamosa Liit. Port Foulke, Godhavn. 



68. Ophiopholis aculeata Liitken. Ophiura aculeata Mull. Godhavn. 



ACALEPH^E. 



69. Lucernaria auricula 0. Fabr., Fauna Groenl., p. 341. Godhavn. 

 Besides the above, Dr. Hayes brought home a considerable number of Nudi- 



branchiata, Actiniae, etc., which are very difficult to determine from alcoholic 

 specimens. 



[May, 



