THE APODOUS HOLOTHUEIANS 35 



tross" Station 2925, lat. 32 32' 30" N., long. 117 24' W., 610 m., is only 18 

 mm. long, but, unlike Ludwig's specimen of the same size, it is well supplied 

 with anchors. Koehler and Vaney ( :05) are convinced that Ludwig's spinosum 

 is only a form of the widespread musculus, and although I think there is room 

 for doubt on the point, I defer to their opinion, as they have had more material 

 for study. 



The form of musculus known as violacea Studer seems to occupy in the 

 Southern Pacific the place that M. intermedia does in the northern, but has an 

 even more extended range, as there are specimens before me from lat. 32 44' 

 N. and nearly 52 S., and not less than 16 intermediate stations, at depths of 

 220-3,229 m. These specimens vary in size from 20 x 8 mm. to 100 x 20, and in 

 color from pale gray, with a few small scattered reddish or purplish spots, to 

 deep wine red, though all the specimens have the oral disc and tail pale gray. 

 There is also great diversity in the shape, abundance, and arrangement of the 

 calcareous bodies ; they are most irregular and scattered in the smallest speci- 

 men and most regular and transversely arranged in the largest. A few of the 

 specimens seem to have no rosettes and anchors and correspond exactly to the 

 descriptions of violacea; others have the browned remains of rosettes, and 

 many others have more or less complete rosettes and anchors present and cor- 

 respond admirably to TheePs description of Ankyroderma danielsseni. I am 

 therefore led to the conclusion that the ankyroderma individuals are probably 

 the young, losing their calcareous particles as they grow older; but the evi- 

 dence is not indubitably convincing. 



6 specimens from "Albatross" Station 2781, lat. 51 52' S., long. 73 41' W., 626 m. 



1 specimen " " 2782, lat. 51 12' S., long. 74 13' 30" W., 464 m. 



7 specimens " " 2783, lat. 51 02' 30" S., long. 74 08' 30" W., 220 m. 

 39 " " 2784, lat. 48 41' S., long. 74 24' W., 349 m. 



1 specimen " " 2923, lat. 32 40' 30" N., long. 117 31' 30" W., 



1,480 m. 



1 " 2925, lat. 32 32' 30" N., long. 117 24' W., 610 m. 



6 specimens " " 3361, lat. 6 10' N., long. 83 6' W., 2,648 m. 



1 specimen " " 3362, lat. 5 56' N., long. 85 10' 30" W., 2,115 m. 



1 " 3366, lat. 5 30' IST., long. 86 45' W., 1,921 m. 



4 specimens " " " 3381, lat. 4 56' N., long. 80 52' 30" W., 3,190 m. 



1 specimen " " 3382, lat. 6 21' N., long. 80 41' W., 3,229 m. 



2 specimens " " " 3392, lat. 7 5' 30" N., long. 79 40' W., 2,286 m. 



8 " " " 3398, lat. 1 7' N., long. 80 21' W., 2,831 m. 



5 " " " 3399, lat. 1 7' N"., long. 81 4' W., 3,132 m. 



1 specimen " " 3407, lat. 4' S., long. 90 24' 30" W., 1,593 in. 



1 " " " 3418, lat. 16 33' N., long. 99 52' 30" W., 1,188 m. 



1 " " " " 3429, lat. 22 30' 30" N., long. 107 1' W., 1,654 m. 



1 " " " " 3627, lat. 32 44' N., long. 119 32' W., 1,397 m. 



87 specimens from 18 stations. 



