158 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 97 
as a result of the biological survey of that region by Sumner, Osburn, 
and Cole (1913), and the plankton studies by Fish (1925), but the 
long stretch of coast from Long Island to Key West and the Carib- 
bean region have been inexplicably neglected. This neglect was 
emphasized by Timmermann’s (1932) study of the fauna of the sargas- 
sum in the mid-Atlantic, which demonstrated beyond question the pe- 
lagic occurrence of two common pycnogonids, Anoplodactylus petrolatus 
and Endeis spinosa. Because of our incomplete knowledge of Carib- 
bean pycnogonids, Timmermann was unable to conclude whether 
these species originated from the European side of the Atlantic or 
the West Indian region. 
Although contributing little to the zoogeography of pycnogonids, 
Cole’s papers on the habits of Anoplodactylus lentus (1901, 1906b) and 
Endeis spinosa (1910) and Dawson’s (1934) account of the corpuscles 
of the blood of Anoplodactylus lentus should be mentioned. Another 
important paper is T. H. Morgan’s doctoral thesis on the embryology 
of Woods Hole pyenogonids (1891), which is a fundamental contribu- 
tion to our knowledge of the subject.* 
This review is based on the Albatross collections in the United 
States National Museum and the Peabody Museum of Yale Uni- 
versity, comprising several hundred specimens; a large series of collec- 
tions from the earlier dredgings of the Fish Commission in New Eng- 
land waters (including many of the lots cataloged in Wilson’s reports), 
and more recent material in the National Museum from Chesapeake 
Bay to the northern coast of South America, including the collections 
from the Tortugas Laboratory of the Carnegie Institution of Wash- 
ington by various collectors over a period of years: C. H. Edmondson, 
1904; Leon J. Cole, 1905, 1906, 1908; Raymond C. Osburn, 1908; 
Waldo L. Schmitt, 1924, 1925, 1930, 1931, 1982; H. Boschma, 1925; 
C. R. Shoemaker, 1926. In addition to this material, the collections 
of the Museum of Comparative Zoology have been placed at my dis- 
posal, representing principally the Caribbean work of the Blake and 
the Atlantis. Some of this material has been discussed in a pre- 
liminary paper (Hedgpeth, 1943b). 
For the privilege of examining the National Museum collections 
and for many other courtesies, I am indebted to Dr. Waldo L. Schmitt, 
head curator of zoology of that museum. I also wish to thank Dr. 
3 Wilson’s Blake report discusses the dredgings made north of lat. 32° N. According to Hoek, in his con- 
cluding remarks in the Challenger Report (1881), the West Indian collections of the Blake were sent to 
Alphonse Milne-Edwards along with the Crustacea, and they may still be in the Paris Museum. The 
material now in the Museum of Comparative Zoology dredged by the Blake in the West Indies consists of 
seven species from eight stations (Hedgpeth, 1943b). 
The Pycnogonida of the northeastern United States littoral are adequately represented in W. O. 
Crowder’s manual “Between the Tides,’’ pp. 334-339, figs. 319-326, 1931. The treatment is unusually com- 
plete for these obscure animals in a popular work. 
4It is interesting to note that three eminent American zoologists, E. B. Wilson, Leon J. Cole, and T. H. 
Morgan, ‘‘cut their teeth’’ on studies of pyenogonids, 
