Boone, Crustacea, Cruises of "Eagle" and "Ara," 1921-28 65 



Subtribe : BRACHYGNATHA. 



Superf amily : Oxyrhyncha. 



Family : Majidae. 



Subfamily: Inachinae. 



Genus: STENOEYNCHUS Lamarck. 

 Stenorynchus seticomis (Herbst). 



Plates 15 and 16. 

 Names : Arrow crab ; Arana del mar. 



Diagnostic characters : Rostrum much longer than carapace in 

 adults. Carapace not pubescent ; palm much longer than fingers ; basal 

 antennal article without spine at extremity. 



Type: Herbst described Cancer seticomis in 1788 after Slabber, 

 who stated that it came from the East Indies. I have not been able to 

 ascertain the repository of Herbst 's type specimen ; most of his types 

 are in the Berlin Museum. The type-locality of Fabricius' Cancer 

 Sagittarius is Guadeloupe ; specimens believed to be these types are in 

 the Copenhagen Museum, labelled "Cancer Sagittarius," and in the 

 Kiel Museum, labelled "Inachus Sagittarius." 



Distribution: This species, which is usually taken in moderate 

 depths, has been taken from the shore-line to 814 fathoms. It is known 

 from the mouth of the Chesapeake Bay southward to Key West, 

 Florida, along the west coast of Florida; south of Mobile Bay, Ala- 

 bama; Cuba; Porto Rico; Bahamas; Jamaica; Bermuda; Yucatan 

 Channel ; the Virgin Islands ; Curagao ; Colombia ; Brazil as far south 

 as Rio de Janeiro. Other records indicate its presence in the Atlantic 

 off "West Africa, and in the Mediterranean Sea but these are probably 

 a confusion with Stenorychus longirostris Fabricius. 



Material examined: Five males and one ovigerous female, taken 

 at Porto Padre, Cuba, March 4, 1926, with dragnet in 10 feet of water ; 

 four very large males and one female dredged in 70 fms., southwest 

 of Marquesas Keys, Florida, March 2, 1924. 



Color : The body is creamy buff with four pairs of chestnut brown 

 margined with white bands diverging from the anterior part of the 

 median line to the posterior margin, simulating a series of superim- 



