10 Bulletin Yanderhilt Marine Museum, Vol. Y 



of India and some of the South Sea Islands. The rare Plagusia 

 speciosa Dana, known to science from only six records, most exquisitely 

 sculptured and colored of the ocean-faring *' log-riders," was an ex- 

 pert mariner centuries before Polynesian man appeared. 



Three new species are Neptune's gift to his brother-in-fins, "W. K. 

 Vanderbilt. Of these Actaeaomorpha alvae Boone, is representative 

 of a little-known genus, morphologically fascinating because it is a dis- 

 tinctive Leucosid which in general appearance resembles the Cancroid 

 crabs of the genus Adaea. The second new species, Actaea aphrodita 

 Boone, is a delicately sculptured specimen from the coral reefs of Bali. 

 The third new species, Lissocarcinus elegans Boone, is representative 

 of a little-known genus of swimming crab, interesting in that it con- 

 nects the subfamily Capkyrinae with the Lupinae. 



Valuable color plates and notes of several species were made dur- 

 ing the cruise by Mr. W. E. Belanske, staff artist of the expedition, 

 under the direction of Mr. Vanderbilt and are deposited in the 

 Vanderbilt Marine Museum. 



Acknowledgments. 



As during the preparation of the three preceding volumes of the 

 Bulletin of the Vanderbilt Marine Museum, Mr. Vanderbilt has con- 

 tinued his gracious generosity in giving me every opportunity for the 

 execution of this investigation. I am also indebted to Miss Ida 

 Richardson Hood, curator of the library of the American Museum of 

 Natural History, and her staff assistants, the Misses Hazel Gay, Ida 

 Sledge, Elizabeth Ertel and Hope Ranslow for their unfailing patience 

 in assisting me with the bibliographic research. The line drawings 

 were done under my direction by Mrs. Elizabeth M. Fulda. The 

 photographic illustrations were similarly retouched by Mrs. Fulda. 



To my colleagues in the European and Asiatic museums and uni- 

 versities I acknowledge my deep indebtedness for their kind assistance, 

 especially in locating many of the early types. 



