part 1 garth: pacific oxyrhyncha 331 



Color in life: Unrecorded. Bell (1836) notes the color of the hair 

 as light brown, that of the body itself paler; these notations were pre- 

 sumably made from the preserved specimen. 



Habitat: Soft mud. (Bell) 



Depth: With no indication of depth given, it is assumed that the 

 specimens obtained by Schmitt were collected intertidally. 5 fathoms. 

 (Bell) 



Remarks: One of the best crustacean finds resulting from the circum- 

 navigation of South America in 1926 by Waldo L. Schmitt under the 

 auspices of the Walter Rathbone Bacon Scholarship Fund of the Smith- 

 sonian Institution was the rediscovery of Bell's lost species, Libinia 

 rostrata. Originally described from among specimens collected by Hugh 

 Cuming on the west coast of South America, the species was known only 

 from Bell's brief description and what proves to be not too accurate 

 illustration, the unique type having meanwhile disintegrated. It was prob- 

 ably not without hesitation that Rathbun (1925, p. 330) referred to 

 Bell's species a specimen from Brazil in the Philadelphia Academy of 

 Sciences and one from Atlantic Panama in the collections of the U. S. 

 National Museum (U.S.N.M. No. 56536). Although the writer has 

 not examined these specimens, they are believed, in view of the discon- 

 tinuity of habitat, to represent a new form, possibly that described by 

 Oliveira (1944, p. 87) as Libinia rostrata var. bellicosa, which in the 

 writer's view should be accorded full specific rank. Certainly Rathbun 

 subsequently recognized in Schmitt's west coast South American material 

 the true L. rostrata, for the determination of the Peruvian specimens 

 redescribed above is hers. 



Genus LISSA Leach 



Lissa Leach, 1815a, p. 69. Rathbun, 1901, p. 64; 1925, p. 331. 

 Lissula Rafinesque, 1818, p. 272; name substituted for Lissa Leach. 



Type: The Mediterranean Inachus chiragra Fabricius, 1798 = Can- 

 cer chiragra Herbst, by monotypy. 



Description: Carapace very convex; surface very uneven; mesogas- 

 tric region especially elevated, sides of gastric and branchial regions steep. 

 Preocular spine or tooth present. Horns of rostrum flattened, contigu- 

 ous, truncate, outer extremities of anterior margin forming a small lateral 

 lobe. Orbit with a superior and an inferior closed fissure; eyes when 

 retracted fitting into cup-shaped inconspicuous postorbital lobe. Basal 

 article of antennae much enlarged, entire, distal margin of outer portion 



