W. G. Van Name — Bermuda Ascidians. 405 



Figure 34. — Didemnum atrocanum , n. sp. Zooid seen from the right side. 



x 32. Page 359. 

 Figure 33. — Didemnum savignii Herdinan. Zooid seen from the left side. x 32. 



Page 358. 

 Figure 36. — Didemnum solidum, n. sp. Zooid seen from the right side, x 32. 



Page 358. 

 Figure 37. — Didemnum lucidum, n. sp. Zooid seen from the left side. No 



reproductive organs developed. x 32. Page 300. 

 Figure 38. — Didemnum orbiculatum, n. sp. Zooid seen from the left side. The 



female reproductive organs only are developed, x 32. Page 361. 



Plate LII. 



Figure 39. — Leptoclinum speeiosum, var. nov. bermudense. Spicules, x 450. 



The smallest spicules were about the branchial orifices. (See also Figure 



42.) Page 364. 

 Figure 40. — Leptoclinum albidum, var. lit teolum Verr ill. From Vineyard Sound, 



Massachusetts. Spicules, x 450. (Introduced for comparison with the 



Bermuda forms.) Page 363. 

 Figure 41. — Leptoclinum albidum Verrill. From the Bay of Fundy. Spicules. 



x450. (Introduced for comparison.) Page 363. 

 Figure 42. Leptoclinum speeiosum var. nov. berm udense. Spicules ( x 450) from 



a different colony from figure 39, showing forms with blunt and broken 



points. Page 364. 

 Figures 43 and 44. — Leptoclinum speeiosum var. nov. lutmiltoni. Spicules from 



two different colonies, x 450. (See also figure 47.) Page 365. 

 Figure 45. — Leptoclinum speeiosum, var. nov. pageti. Spicules, x 450. (The 



small spicules in the right hand part of the figure were in small groups 



alongside the bodies of the zooids, not scattered among the other spicules.) 



Page 364. 

 Figure 46. — Leptoclinum speeiosum, var. nov. acutilobatum , Spicules. x450. 



Page 365. 

 Figure 47. — Leptoclinum sjjeciosum, var. nov. hamiltoni. Spicules ( x 450) with 



thicker points than those shown in figures 43 and 44. Page 365. 

 Figure 48. — Leptcolinum speeiosum, var. nov. somersi. Spicules. x 450. Page 



366. 

 Figure 49. — Leptoclinum speeiosum, var. nov. harringtonense. Spicules. x 450. 



Page 365. 

 Figure 50. — Leptoclinum speeiosum, var. nov. bermudense. Zooid seen from left 



side, x 32. Page 364. 

 Figure 51. — Leptoclinum speeiosum, var. nov. harringtonense. Zooid from the 



same colony as the spicules shown in figure 49. x 32. Page 365. 

 Figure 52. — Leptoclinum speeiosum, var. nov. acutilobatum. Zooid from the 



same colony as the spicules shown in figure 46. x 32. Page 365. 



Plate LIII. 



Figure 53. — Botrylloides nigrum, var. nov. concolor. Zooid seen from the right 

 side. The male reproductive organs only are developed on the right side. 

 On the left side a large egg is present just anterior to the testes, x 32. 

 Page 378. 



