Holothurians allied to Cucumaria frondosa (GUNNER). 601 
Enteric canal. — The third loop of the enterie canal is 
attached to the left of, and near to the mid-ventral radial muscle. 
Habitat. — This species is two-thirds eircum-polar, extending 
south to Britain in the eastern Atlantic Ocean and to the neigh- 
borhood of Nantucket Island, Massachusetts in the western Atlantic, 
POURTALES, 1869, reports it off Florida in 118 fathoms. Lupwig, 
1900, gives a very complete account of the geographical distribution. 
Localities of the 123 specimens in the United 
States National Museum. — 40° 19' 30“ north latitude, 69° 
29° 10“ west longitude, depth 41 fathoms. 40° 34/30“ north lati- 
tude, 69° 50' 45“ west longitude, depth 32 fathoms. 42° 01‘ north 
latitude, 68° 00' 30“ west longitude, depth 86 fathoms. 42° 10,5‘ 
north latitude, 70° 29° west longitude, depth 26 fathoms. 42° 23° 
north latitude, 66° 23° west longitude, depth 141 fathoms. 42° 31‘ 
north latitude, 70° 32‘ west longitude, depth 35 fathoms. 42° 33° 
north latitude, 70° 31‘ west longitude, depth 40 fathoms. 42° 41‘ 30" 
north latitude, 70° 24° 30“ west longitude, depth 26 fathoms. Glou- 
cester Harbor, depth 7—110 fathoms. Coast of Maine. Banks of 
Newfoundland, depth 26—180 fathoms. Anticosti Island, Canada. 
Off Newfoundland, from 43° 08° north latitude, 50° 40° west longitude 
to 45° 33’ north latitude, 49° 43’ west longitude, depth 36—65 fathoms. 
Labrador’s reef, Ungava. Greenland. Bergen, Norway. 
Oucumaria californica SEMPER. 
1868. Cucumaria californica SEMPER. 
1855. Pentacta frondosa AYRES. 
1907. Cucumarta frondosa EDWARDS. 
Of the cycle of the Pacific Ocean species similar to Oucumaria 
frondosa, this form most nearly resembles it. In fact, in my paper 
of 1907, specimens were placed under Cucumaria frondosa but the 
study of this larger series of individuals shows differences in the 
spicules that make these holothurids agree with Cucumaria californica 
SEMPER. It is probable that the Pentacta frondosa of Aykzs, 1855, 
and Srımpson, 1857, belongs to this species, as SEMPER, 1868, thinks 
likely. Cucumaria californica more or less closely resembles (ueu- 
maria frondosa in all characters except the spicules. In addition to 
SEemPpEr’s description the following facts are noted. 
Size in centimeters. — The contracted body in the 31 fixed 
adults measured has a mean length of 10,6, with a range from 
