198 Bulletin Vanderbilt Marine Miiseum, Vol. VII 



80 fathoms, includes more and larger specimens of this deep- 

 water spider crab than are known from all previous expeditions 

 and also establishes the most northern record for it. The second 

 species, Rochinia crassa (A. Milne Edwards), is represented by 

 two large specimens dredged by the "Alva" off Fowey Rocks, 

 Florida, in 100 to 200 fathoms, bearing numerous Lepad barna- 

 cles. The larger of these crabs is one of the largest specimens 

 known. The capture of an exceptionally fine specimen of Steno- 

 cionops ovata (Bell) in 45 fathoms, off the Pearl Islands, Bay 

 of Panama, afforded opportunity to correlate Mr. Thomas Bell's 

 species, established on a young specimen from Galapagos over a 

 hundred years ago, with the gigantic adult crabs which more 

 recent writers have described under various synonyms. 



The family Portunidae is represented in the present report 

 by four species of exquisitely colored swimming crabs, three of 

 which are members of the genus Neptunus: Neptunus pelagicus 

 (Linne) with its lovely jade green body delicately etched with 

 sea-foam splashings, was obtained by the "Ara" in Manila Bay ; 

 N. sanguinolentus (Herbst) , bearing the legendary "blood drops' 

 of a slain Polynesian warrior, on its opalescent shell, was also 

 taken in series by the "Ara" in Hawaiian waters and the very 

 rare N. tuherculosus A. Milne Edwards, with its shell sculptured 

 to resemble grains of sand, enhanced by a color reticulation per- 

 fecting mimicry of water-rippled sand, was caught at Aden, in 

 the Arabian Sea. This latter species is apparently for the first 

 time deposited in an American museum. The strikingly beautiful 

 Podophthalmus vigil (Fabricius) , previously reported in the crabs 

 of the "Alva" World Cruise, was also taken by the "Ara" in 

 Hawaiian waters. 



Three species of Cancridae were taken. Tliese include the 

 barnacle encrusted east American deep-water species. Cancer 

 borealis Stimpson, which was taken in series from off Fowey 

 Rocks, Florida, in 100 to 200 fathoms, and two rare Chilean 

 species, — Cancer coronatus Molina, oldest of the American species 

 of Cancer and perhaps most decoratively ornamented, first de- 

 scribed by the Abbe Don Juan Ignacio Molina, in 1787, material 

 of which was taken by the "Alva" at Ascencion Island, Chile, 

 enabling the writer to restore to this species its true name. Some 

 very fine specimens of Cancer edwardsii Bell were taken in series 

 at Port Lagunas and Bahia Ancud, Chiloe Archipelago, Chile. 



