238 BULLETIN OF THE MUSEUM OF COMPARATIVE ZOOLOGY. 



Fig. 37. Ophiocnida ahnonnis, below ; \. 

 Fig. 33. " " above; f. 



Fig. 39. " " arm-joints ; f. 



Fig. 40. Ophiochata (?) mixta, below ; \. 

 Fig. 41. " " above ; J. 



Fig. 42. " " arm-joints ; \. 



PLATE III. 



Fig. 43. Ophiozmm tessellata, below ; f . 

 Fig. 44. " '« above ; f . 



Fig. 45. " " aim-joints ; f. 



Fig. 46. Ophiomusium planum, below ; J. 

 Fig. 47. " " above ; f . 



Fig. 48. •' " arm-joints; f. 



Fig. 49. Ophioconis miliaria, below ; J. 

 Fig. 50. " " above; |. 



Fig. 51. " ♦' arm-joints ; J. 



Fig. 52. Ophiolipus Agassizii, below ; f . 

 Fig. 53. " " above ; I 



Fig. 54. " " arm-joints; f. 



Fig. 55. Sigsbcia murrhina, below ; f . 

 Fig. 56. " " above ; f. 



Fig. 57. " " ' arm-joints near base of arm ; |. 



Fig. 58. " *' arm-joints near tip of arm ; f. 



Fig. 59. Astroschema intedum, below ; f . The first pore usually has no ten- 

 tacle-scale. 



Fig. 60. " " above ; |: 



Fig. 61. " " arm-joints ; f. 



Fig. 62. " arenosum, below ; |. * 



Fig. C3. " " above ; §. 



Fig. 64. " " arm-joints ; f. 



Cambuidge, December 14, 1878. 



