CRUSTACEA NORTH PACIFIC EXPLORING EXPEDITION ']'J 



III. LUPA SAYI^ Gibbes 



Lupa pelagica Say (non Leach). 



Lupa sayi GibbEs, Proc. Am. Assoc, 1850, p. 178. Dana, U. S. ExpL 

 Exped., I, 273, pi. XVI, fig. 8. 



Found in the western parts of the A'orth Atlantic Ocean, generally 

 among gulf-weed. x\ fine pair, male and female, were taken to- 

 gether, swimming at the surface in N. lat. 33° 43', E. Ion. 6y° 43'. 



Genus AMPHITRITE De Haan 

 112. AMPHITRITE GRACILIMANUS= Stimpson 



PtATE X, Fig. 3 



Amphitrite gracilimanus Stimpson, Proc. Acad. Nat. Sci. Phila., x. p. 38 

 [36], 1858. 



Carapax convex ; proportion of length to breadth in the male, 

 1 : 1.8. Superior surface pubescent, and transversely marked with 

 raised, granulated lines or narrow ridges. Three of these lines 

 cross the gastric region ; the foremost interrupted at the middle ; the 

 second traversing the whole extent of the region ; the posterior 

 one shortest, and placed in the same line with the foremost ridges of 

 the branchial region. Two short ridges on the posterior portion of 

 the branchial region. Cardiac region somewhat prominent, with an 

 interrupted transverse ridge, behind which its surface is granulated. 

 Antero-lateral margin with nine sharp teeth, including the angle of 

 the orbit; posterior tooth about twice as long as the next. Frontal 

 margin with a median fissure, and four equal subtriangular teeth, 

 the median ones very slightly more prominent than the lateral ones. 

 Eyes very large, globular. Upper margin of orbit with two fissures, 

 with an inconspicuous tooth at the outer one, which is considerably 

 removed from the outer angle of the orbit. Inferior fissure of orbit 

 very large. Chelopoda pubescent, elongated in the male ; meros 

 broad and thick, narrowing toward the carpus, its upper surface 

 scabrous, with a longitudinal ridge parallel to the posterior margin : 

 anterior margin of meros with four teeth or spines, posterior margin 

 with two spines the outer one terminal, inner one placed far within 

 and connected with the longitudinal ridge ; carpus slender, two- 

 spined ; hand very slender with prominent longitudinal granulated 

 ridges or costae and three sharp spines above, two of which are 



^ Portuuus sayi (Gibbes). 



'Portiinus (Lupocycloporus) gracilimanus (Stimpson'). 



