50 PROCEEDINGS OF THE NA TIONAL MUSEUM. vol. xxxiii. 



2. CHIRIDOTA ALBATROSSII Edwards, new species. 



June 25, 1903. — No tentacle-crown, but twelve body fragments; Sta- 

 tion 4201, 138 to 145 fathoms; bottom, temperature 45. 5°, soft gray mud, 

 sand, broken shells. July 6. — Three tentacle-crowns and eleven body 

 fragments; Station 4223; lat. 55° 1' 9" N., long. 130^ 42' 3" W.; 48 to " 

 57 fathoms; bottom, temperature 44. G"', soft, green mud. July 7. — 

 One body fragment; Station 4226; lat. 55^ 36' 18" N., long. 131'- 37' 

 16" W., 31 to 62 fathoms; bottom, temperature 44.8°, rocky. July 

 7. — One tentacle-crown and one body fragment; Station 4228; lat, 55° 

 36' 15" N., long. 131° 42' 30" W.; 41 to 134 fathoms; bottom, temper- 

 ature 47.8°, gravel, sponge. July 7.— One body fragment; Station 

 4232; lat. 55° 35' 36" N., long. 131° 53' 49" W.; 77 to 93 fathoms; 

 bottom, temperature 43.3°, green mud, sponge, rocky. July 9. — One 

 bodyfragment; Station 4239; lat. 55° 28' 35" N., long. 131°46' 48" W.; 

 206 to 248 fathoms; bottom, temperature 48.8°, coarse sand, rocky. 



These specimens resemble C. Za?i'?.s' (Fabricius) in many respects, but 

 the presence of rods in the anterior part of the bodj^ wall, the greater 

 size of the body, and the larger number of wheel-papill?e constitute 

 the chief differential characters of this new species. 



In 1851 Pourtales described a CJuridota from Florida under the 

 name of Synapta Totifera. Pourtales's species also has rods in addition 

 to the wheels, but it is much smaller than alhatrossii and lives among 

 the branches of coral in shallow water. 



Generally C. hvvis has been taken from rather shallow water (up to 

 27 fathoms, only exceptionally up to 50 fathoms, Ludwig, 1900, p. 165), 

 while these specimens come from a range of 31 to 248 fathoms. 



Body. — Elongated, cylindrical. One fragment 21.5 cm. long and 

 9 mm. in diameter, whole posteriorly, has some of the detached ends 

 of gonads in the anterior coelom, where it is broken off from the 

 tentacular piece, so it may represent approximately the length of the 

 individual in alcohol. But in this specimen the body wall is greatly 

 contracted, as shown by the many thickened folds and the crowded 

 dorsal wheel-papilhe. Therefore it is probable that the living animal 

 is considerably longer. Another fragment, also with anal end intact, 

 is 22 cm. long and the diameter varies from 6 mm., where most con- 

 tracted, to 12 mm. in the well-expanded parts, where the skin is 

 stretched thin. A third fragment, with both anterior and posterior 

 ends missing, measures 17 cm. in length and 5 mm. in diamet&r. 

 Since the remaining shorter pieces are of about the same average 

 diameter as the above, it may be assumed that, with the tentacular 

 part added, the species would have a length of 18 to 25 cm. and a 

 diameter of 6 to 12 mm. In regard to the size of C. Ixvis., Duncan 

 and Sladen, 1881 (p. 14), say: ""The largest example of this species has 

 been recorded b}' Sars, and measured 100 mm. in length; generally. 



