18 BULLETIN OF THE 
have each two pairs of minute branches or digits. The calcareous ting has 
five bipartite prolongations. 
The very crowded deposits consist of irregularly formed tables, which devi- 
ate from those described by Semper, etc. in having much larger disks and a 
spire made up of only three rods, in consequence of which I propose to refer 
the Blake specimens to a variety. In general, the disks of the tables are large, 
smooth, of an irregular shape with uneven margin, and pierced with numerous 
holes. They often have an irregular triangular or quadrangular form, with 
twenty or more holes. The spire is composed of three irregularly spinous 
rods, united by a few (two or three ?) transverse beams. So far as I can 
understand from the descriptions hitherto made, the spire in the typical 
specimens should be composed of four rods. 
Habitat. Lat. 35° 44’ 40” N., Lon. 74° 40’ 20” W. (1880); depth 898 
fathoms ; three specimens. Lat. 41° 24’ 45” N., Lon. 65° 35’ 30” W. (1880); 
depth 1242 fathoms ; two specimens. 
Ankyroderma affine, Danretssen & Koren (var.). 
In the specimen dredged at St. Vincent, a few light wine-colored bodies are 
present. On the contrary, I have not been able to detect a single one of those 
colorless bodies which have been figured and described by Danielssen and 
Koren (compare Figs. 26 and 27 in their report), and I must confess that these 
bodies appear to me to be nothing else than artificial products owing to preser- 
vation in alcohol. 
Among the “tables” I have observed a few very scattered, minute perforated 
plates supporting a very long spine, which carries at the top a crown of hooks, 
like those found by me in Trochostoma antarcticum. The anchors always 
have a discoidal, perforated base. Contrary to what is observed in Ankyro- 
derma Jeffreysvi (var.), I never found the fusiform bodies except at the extrem- 
ities of the body. 
Habitat. St. Vincent (1878-79) ; depth 464 fathoms; one specimen, 35 
mm. long. Dominica (1878-79) ; depth 391 fathoms; one specimen. 
Ankyroderma Jeffreysii, Danrerssen & Koren (var.). 
Some of the specimens have a marked violet color from more or less crowded 
wine-colored bodies, while others are almost colorless and devoid of such 
bodies. The anchors have a discoidal perforated base, just as I have found in 
Ankyroderma Danielssent, which possibly may prove to be only a variety of 
Ankyroderma Jeffreysit. 
Habitat. Lat. 41° 33’ 15” N., Lon. 65° 51’ 25” W. (1880); depth 810 
fathoms; two specimens. Lat. 34° 39’ 40” N., Lon. 75° 14’ 40’ W. (1880); 
depth 603 fathoms; one specimen. Lat. 38° 20’ 8” N., Lon. 73° 23’ 20” W. 
