OXYSTOMATOUS AND ALLIED CRABS OF AMERICA 



13 



Measurements. — Male type (9659), length of carapace 35.6, width 

 at middle 18.4, width between tips of hepatic spines 20.8, width of 

 front 12.2 mm. 



Bange.— G\Ai of Mexico, 68 fathoms. 



Material examined. — East of Mississippi Delta, La.; lat. 29°14'30" 

 N., long. 88°09'30" W.; 68 fathoms, gy. M., February 11, 1885; 

 station 2378, Albatross, 1 c? , 2 $ (1 ovig.) (9659), 1 male on exhibition 

 (20215). 



Figure l.—Raninoides louisianensis: a, Anterior portion of carapace; 6, distal half of right cheliped, upper 



surface. 



RANINOIDES LAMARCKI Milne Edwards and Bouvier 



Figure 8; Plate 1, Figures 3, 4 



IRanina dorsipes Lamarck,^ Histoire naturelle des animaux sans vertebres, vol. 

 5, p. 225, 1818. 



Raninoides laevis var. lamarcki Milne Edwards and Bouvier, Mem. Miis. 

 Comp. Zool., vol. 47, p. 299, pi. 1, figs. 8, 9; pi. 2, figs. 4, 5, 1923 (type local- 

 ity unknown; type in Paris Mus.). 



Diagnosis. — Postorbital sinuses parallel and shorter than the dis- 

 tance separating them. Only three spines on lower margin of manus; 

 no spine at base of mobile finger. 



Figure 8.— Raninoides lamarcki: a, Anterior portion of carapace, enlarged (after Milne Edwards and 

 Bouvier); 6, distal half of right cheliped, upper surface. 



Description. — Akin to R. louisianensis. The tooth on either side 

 of the front, bounded by the sinuses, is devoid of a spine. The outer 

 orbital spine and the hepatic spine are reduced. The arm lacks a 

 spine. The dactyl of the third ambulatory is \vider than in louisi- 

 anensis. 



* The dorsipes of Lamarck is said by him to inhabit the Indian and Southern Oceans. This would throw 

 some doubt as to the identity of the specimen in the Paris Museum with that actually seen by Lamarck. 

 The characters of the specimen figured by Bouvier in Mem. Mus. Comp. Zool., vol. 47, 1923, as lamarcki 

 are those of the four American specimens that I here record as R. lamarcki. 



