76 Bulletin, Vanderhilt Marine Museum, Vol. Ill 



The eyestalks are short, stout, constricted below the cornea and pro- 

 duced distally on the dorsal surface into a rounded process which 

 projects onto the cornea ; the cornea is large, elliptical. 

 Synonymy. — Porcellana armata Gibbes, Proc. American Assoc. Adv. 



Sci., vol. 3, p. 190, 1850. 

 Porcellana gundlachii Guerin, in La Sagra's Hist. Cuba, vol. 8, atlas, 



Articulata, pi. 2, fig. 6, 1855. 

 Petrolisthes armatus Stimpson, Proc. Acad. Nat. Sci. Phila., vol. 10, 



p. 227, 1858 ; Ann. Lye. Nat. Hist. New York, vol. VII, p. 73, 1860. 



— KiNGSLEY, Proc. Acad. Nat. Sci. Phila., 1879, p. 406. — Ort- 



mann, Zool, Jahrb., vol. X, p. 280, 1897. — Rathbun, Ann. Inst. 



Jamaica, vol. 1, art. 1, p. 40, 1897. — Benedict, Kept. U. S. Comm. 



Fish., vol. 20, part 2, p. 133, 1901.— Rathbun, Proc. U. S. Nat. 



Mus., vol. 38, p. 558, pi. 41, fig. 3, 1911. — Verrill, Trans. Conn. 



Acad. Arts and Sci., vol. 13, p. 434, 1908. 



Petrolisthes galathinus (Bosc). 



Plate 20. 



Type: The locality of Bosc's type was unknown. 



Distribution : West Indian region ; littoral. 



Material examined : One specimen from Cualeo Reales, Cuba. 



Diagnostic characters: Carpus of chelipeds two-thirds as wide, 

 including the marginal teeth, as it is long ; a series of about six promi- 

 nent rounded squamae form a median ridge on the dorsal surface; 

 smaller granules are scattered on the remaining dorsal area ; the pos- 

 terior lateral margin is accentuated by a series of about six rugae, 

 which are produced into upward- and forward-pointing spines, the 

 distal one of which projects beyond the margin ; the anterior lateral 

 margin is cut into five acute jagged triangular teeth, which have their 

 margin finely serrate. 



Carapace convex in both directions; lateral margins delineated by 

 a line which terminates anteriorly in a single, sharp hepatic spine. 

 Dorsal surface of carapace devoid of rugae except for a pair of wide, 

 transverse rugae on the anterior part of the gastric region, minutely, 

 sparsely granulate and finely hirsute. Distal pair of sutures on the 

 telson oblique. 



Technical description : Carapace as wide as long, convex in both 

 directions; lateral margins delineated by a line which terminates 

 anteriorly in a sharp hepatic spine. Rostrum two-fifths as wide as 



