Fig. 



35. 



» 



36. 



» 



37. 



» 



38- 



>> 



40. 



» 



41. 



Fig. 



42. 



» 



43. 



» 



44. 



» 



45. 



KUNGL. SV. VET. AKADEMIENS HAN DUNii AK. KAM) 47. V<> I. .;., 



Figs. 35—41. Phascolosoma nordenskjtUdi n. 



(South Georgia and Falkland Islands.) 



Tlic animal from South Georgia. 8 /i- 



» >> » Falkland Islands: Port William, having theproboscis withdrawn. 



Anterior part of the proboseis with its tvvo tentacular lobcs. ' 

 -39. Side views of the foremost part of the proboseis, showing the hooks. '-°/i. 

 Sample of skin from about the middle of the body. '-" i. 

 Sample of skin from the posterior part of the body. lS0 /i. 



Figs. 42 — 45. Phascolosoma minutum Kefekstein(?). 



(Falkland Islands: Port William.) 



The animal. 16 /i. 



» » with the proboseis withdrawn. 16 /i. 



Front view of the proboseis. 70 /i. 

 Side view of the proboseis. 7 %- 



Plate IV. 



Figs. 46—49. Phascolosoma minutum Keferstein(?). 



Fig. 46. Side view of the skin from the proboseis. 160 /i. 



» 47. Sample of skin from the posterior of the body. i6 J v 



» 48. Upper view of a glandular body with papilla from the posterior extremity. :!r,n /i- 



» 49. Side view of such a papilla. 35 %- 



Figs. 50—66. Phascolion strombi (Mont.)(?). 

 (Shag Rocks Bank.) 



Fig. 50. The animal having a part of the oesophagus turned out. i /i. 

 » 51. The terminal part of the proboseis of the same animal. u /i- 

 » 52. An animal cut open along the dorsal surface to show the internal strueture. %■ 



a, anus; r, rectum with the divertiele; m, iixing musclcs; de, eoils of the intestine ränning down- 

 wards; uc, coils of the intestine running upwards; n, nerve-cord; s, segmental organ; oe, oesophagus 

 with its vessel; dr, dorsal retractor; vr, ventral retractors. 



53. Different views of hooks. 24 %. 



54. Sample of skin with papillfe from the middle of the proboseis. 5 %- 



55. Side-view of the same. 56 /i- 



56. Sample of skin on the transition from the trunk to the proboseis. 56 /i- 



57. Sample of skin from the foremost part of the trunk. 5G /i- 



58. Side-view of the same. 56 /i- 



59. Sample of skin from the middle of the body. 56 /i. 



60. Side-view of the same. 56 /i- 



61. Sample of skin from the girdle of horseshoe-shaped papilloe. 56 /i. 



62. The same of another specimen. 56 /i. 

 63 — 64. Side-views of the same samples of skin. r ' G /i- 



65. Sample of skin from the posterior extremity of the body. 56 /i. 



66. Side-view of the same. 56 /'- 



Plate V. 



Figs. 67—68. Phascolosoma margaritaceum (Särs). 



Fig. 67. Front view of the tentacular-crown. 18 /i- 



D, dorsal surface with ciliated sensc-pads; V, ventral surface. 



