12 ALLAN HANCOCK ATLANTIC EXPEDITION REPORT 



terolateral angles of carapace, lateral borders of each somite, and lat- 

 eral margins of telson dark brown, almost metallic. Posterior margin 

 of telson orange-red. Uropod with movable spines, ultimate segment of 

 outer branch, and inner branch red. The notches of the abdominal 

 carinae are red. 



Genus Squilla Fabricius, 1787 



Seventeen species of Squilla are now known from the western At- 

 lantic, and 13 of these have been reported from northern South Amer- 

 ica. Two species, S. armata H. Milne-Edwards, 1837, and 5. brasiliensis 

 Caiman, are found south of Cabo Frio, Brazil, and the former is prob- 

 ably restricted to the Magellanic area in the southwestern Atlantic. Two 

 other species, S. heptacantha (Chace, 1939) and S. intermedia Bige- 

 low, 1893, are not known south of Cuba (Manning, 1959) in the west- 

 ern Atlantic, although Ingle (1960) reported S. intermedia from West 

 Africa, greatly extending its range. 



Nine of the 13 species from northern South America have exten- 

 sive ranges, at least from Florida to the Guianas, and three are known 

 only from South America (5. lijdingi, S. surinamica, and S. tricari- 

 nata) . S. obtusa is known from Puerto Rico, the Guianas and Trinidad. 



Key TO Species of Squilla From 



The Atlantic Coast of Northern South America 



1. No median carina on carapace anterior to level of cervical 

 groove ; raptorial dactylus armed with four teeth .... 2 

 A sharp median carina on carapace anterior to level of cervical 

 groove; raptorial dactylus with more than four teeth ... 4 



2. Submedian carinae of telson extending forward to base of ter- 

 minal spine of crest S. quadridens 



Submedian carinae of telson extending forward almost to base 



of crest 3 



3. Telson with four dorsal carinae lateral to each submedian carina. 



[5. tricarinata Holthuis, 1941 ; Santa Marta, Colombia] 

 Telson without additional carinae lateral to each submedian 

 carina S. schmitti 



I 



