ATLANT. DEEP-SEA EXPED. 1910. VOL. III]. 



PTEROPODA. 



69 



Gymnosomata PI. V — IX. 



ac.ap = acetabuliferous 



; appendage 



m 



= mouth 





an = anus 





m.t 



= median tubercle (foot) 





b.c — buccal cones 





pb 



= proboscis 





f = foot 





pen 



= penis 





gd = genital duct 





P-g 



= posterior gill 





g.gl = genital gland 





p.l 



= posterior lobe (foot) 





gl.l — glandular lip 





r 



= radula 





h.s = hook-sac 





r.c 



= radula cone 





j = jaw 





r.s 



= radula-sac 





l.g = lateral gill 





t 



= tentacles 





1.1 = lateral lobe (f< 



)Ot) 



w 



= wings 





ite V. 







Plate 



VIIT 



Fig.35— 36. Pneumodermopsii macrochira Pelseneer, in ventral and Fig.59- 

 dorsal view, l.s large sucker; pr. protuberances. (X '6). „ 61- 

 „ 37 — 38. The same; contracted individuals (X 8). 



39. The same; lateral arm of the acetabuliferous appendage. 



40. The same; median part of the acetabuliferous appendage. 

 *, ** differently shaped suckers. 



41. The same; jaw. 



42. The same; sucker of the lateral acetabuliferous arm. 

 „ 43—44. The same; sucker of the median pirt of the acetabuliferous 



appendage, (43) from below and (44) from above. 



-60. 

 -62. 



63. 

 64—65. 



66. 



67—68. 



69. 



70. 



Plate VI. 



Fig. 45— 46. Pneutnoderrnopsis michaelsarsi n. sp., (45) from dorsal 

 and (46) from the right side (X 16). 

 47. The same; buccal organs. 

 „ 48. The same; part of the acetabuliferous appendage. 



„ 49—50. Pneumoderma atlantica n. sp., (49) ventral and (50) Fig. 71— 72. 

 dorsal view, sph sphere surrounding the genital organ 

 (X 16). . 73. 



51. The same; hook-sac evaginated. 



52. The same; jaw. ., 74- 



Plate VII. . 77 



Fig.53— 54. Cepkalobrachia macrochaeta n. gen. and sp., (53) dorsal 

 and (54) ventral view (X 16). 

 „ 55. The same individual seen from the anterior end (X 16). 



56. The same; contracted individual, gr groove of the foot- 

 lobe (X 8). 

 » 57. The individual of fig. 53 — 55. Radula and glandular lip. 



58. The same; part of the radula. 



-75. 



76. 



78. 

 79. 

 80. 



Clione limacina Phipps, ventral and dorsal views (X 8). 



Notobranchaea tetrabranchiata a. sp., dorsal and ventral 



views (X 8). 



Fowlerina hjortii n. sp., dorsal view (X 16). 



The same; contracted individual, dorsal and ventral 



views (X 8). 



The same; neck and head-region seen from the right 



side, proboscis half contracted (X 16). 



The same; head seen trom (67) dorsal and (63) ventral 



side (X 16). 



The same; posterior gill, a seen from the side and 



b from the posterior end (X 16). 



The same; anterior end of a partly contracted individual, 



ventral side below (X 16). 



Plate IX. 



gen. and sp., dorsal and 



Microdonta longicollis 



ventral views (X 8). 



The same; anterior end of an individual with evaginated 



proboscis (X 16). 



The same; hook-sacs with their groups of clear cells, c.c. 



The same individual as in fig. 73; anterior end of the 



proboscis. 



The same; spines of the jaw. 



The same; median part and left side of the jaw. 



The same; radula. 



