NO. 9 manning: Atlantic stomatopod Crustacea 41 



niles of it and G. oerstedii could not be differentiated; this is probably 

 an expression of their close relationship, but need not indicate that the 

 forms are identical, as the young of several groups, particularly xan- 

 thid crabs, are indistinguishable. 



A diagrammatic drawing of the telson of Gonodactylus, to illustrate 

 the terms used in the key and the descriptions, is shown in Plate 10. 



Key to the Species of Gonodactylus From the Atlantic Coast 

 OF Northern South America 



1. Dorsal surface of telson armed with numerous small spinules; 

 sixth thoracic and first abdominal somites with a rectangular 



patch of dark chromatophores G. spinulosus 



Dorsal surface of telson not armed with small spinules; no rec- 

 tangular patches of chromatophores on sixth thoracic and first 

 abdominal somites 2 



2. Dorsal carinae rounded, sometimes swollen, not armed poster- 

 iorly G. oerstedii 



Dorsal carinae of telson sharp, not swollen, armed posteriorly 

 with a strong spine . [G. cwracfloewm Schmitt, 1924; Curaqao] 



Gonodactylus spinulosus Schmitt, 1924 

 Plate 11, figs. 3-4. 



Gonodactylus oerstedii var. spinulosus Schmitt, 1924(a), p. 96, pi. 

 V, fig. 5; Bigelow, 1931, p. 123; Lemos de Castro, 1955, p. 45. 

 Previous records: 

 Barbados (Schmitt, 1924a) ; Playa de Ponce Reef, Porto Rico (Bigelow, 

 1931) : Virgin Islands ( ?) (Hansen, 1926) ; Gulf of Panama ( ?) 

 (Hansen, 1926) ; Trinidad (Lemos de Castro, 1955) ; Cape St. 

 Roque, Brazil (Bigelow, 1931). 

 Material examined: 

 A46-39; Vista Alegre, Curasao; April 23, 1939; shore; 3$ $ (AHF; 

 USNM). 

 Measurements: Males, 30.6 to 34.6 mm, total length. 

 Description : Anterolateral angles of rostral plate rounded ; ocular 

 plates rounded dorsally; telson with accessory carina mesial to lateral 

 carina ; dorsal surface of telson armed with numerous small spinules, ar- 

 ranged as follows: one posteriorly on median carina; one posteriorly on 

 each submedian carina; one posteriorly and one dorsally on each inter- 

 mediate carina; two on the knob; 3-7 on the ridge of the submedian 



J. 





