KO 



NGL. SV. VET. AKADEMIENS HANDLINGAR. BAND 25. N:0 2. 183 



Plate IL 



Herpetocrinus (continued). 



H. convolutus (p. 48). 



Fig. 50. The only known Gotland specimen; coiled stem, lying on matrix. (p. 49.) 



Fig. 51. Same specimen; a few columnals witli cirri, from b in Fig. 50. (p. 49.) 



Fig. 52. Same specimen; sections of the stem at points marked a and b in Fig. 50. (p. 49.) 



Fig. 53. Same specimen: articular surface of a eirral. (p. 49.) 



H. Ammonis (p. 49). 



Fig. 54. Specimen a, rar. bijugicirrus? ; the coiled stem. (p. 50.) 



Fig. 55. Same specimen; eighl columnals bearing fbur cirri on one side. (p. 51.) 



Fig. 56. Same specimen; seen from the outer curve, showing tlie diminution of the distal end ■>(' the 



stem. (p. 50). 

 Fig. 57. Same specimen; fonr columnals seen from the outer curve, showing their alternation of si/e 



and tlie longitudinal sutures (pp. 50, 51). 

 Fig. 58. Same specimen; transection of stem, showing relations of axial canal, sutures and cirrus. This 



columnal has only one cirrus, though most bear two. (p. 51). 

 Fig. 59. Same specimen; distal end of stem, seen from inner curvature, showing irregularity of columnals 



and diminution in diameter distal-wards. (p. 50). 

 Fig. 60. Same specimen; transection of the stem at the extreme distal end. 

 Fig. 61. Specimen b, var. alternicirrus ; portion of stem, showing arrangement of columnals. articular 



surfaees for cirri. and inner curve. (pp. 50, 51). 

 Fig. 62. Same specimen; transection of stem, showing large axial canal, sutures and cirrus-articulation. 

 Fig. 63. Same specimen; transection of stem uith attached cinal, showing smaller axial canal and 



passage therefrom into cirrus. Traces of muscular strueture are seen in the upper part of 



this section, as in Text-tig. 12 (5). 



.V. B. The reader is requested to make the following corrections in the text of the references 



to the preceding figures. 



]i. 43. par. 2. line 3; for 53 read 57. p. 50, par. 3, line 4; for 54 read 58. 



p. 43, par. 2. line 5: for G3 read 6.8. p. 50, par. 3. line 4; for 56 read 60. 



p. 43. par. 2, line 5; tor 65 read 71. p. 50. par. 7, line 2; for 53 read 57. 



p. 43. par. 2. line 6; for 66 read 67. p. 50, par. 7, line 7; for 51 read 55. 



p. 43, par. 2, line 6; for 68 read 72. p. 51, par. 1. line 1; for 51 read 55. 



p. 44. par. 1, line 4: for 66 read 69. p. 51. par. 1, line 3; for 55 read 59. 



]). 45. par. i, line 7; for 52 read 56. p. 51, par. 1. line 3; for 57 read ill. 



p. 51, par. 2, line 4; for 54 read 62. 



H. flabellicirrus (p. 51). 



Fig. 64. Specimen n; from side, showing four sets of cirri overlapping one another. (p. 51.) 



Fig. 65. Another specimen; the coiled stem, showing regions 2, 3 and 4, with a section of the stem 



in region 4. (p. 52.) 

 Fig. Cjö. Specimen b; from side, showing long cirri and portions of all the stem regions, which are 



numbered. (p. 51.) 

 Fig. 67. Same specimen; the stem regions from 1 to 5 seen in section. (pp. 4:;, 52.) 

 Fig. 68. Specimen c; stem region 6 seen from tlie outer curve, showing outer median sutures and 



origins of cirri. (pp. 43, 52.) 



