Figure 33. — Pcnacus (M.) duoranim notialis P^rez Far- 

 fante. Sixth abdominal somite, posterodorsal portion, 

 $ 42 mm C.I., off Great Pedro Bluff, Jamaica. 



mm. c. 1., and less in smaller and larger size classes 

 (fig. 35) ; both lips sharp. Sixth abdominal somite 

 with three prominent cicatrices on each side, an- 

 terior the longest; fifth somite with one cicatrix 

 and series of minute pits anterior to sinus on 

 posterior margin of somite; fourth abdominal 

 somite with similar series of pits dorsal to sinus on 

 posterior margin of somite. Telson unarmed, with 

 deep median sulcus and sharp pointed tip. 



PETASMA (fig. 36) 



As in P. d. duoraruTn. 

 APPENDIX MASCULINA 



As in P. d. duoranim. 

 THELYCUM (fig. 37) 



Similar to that of P. d. duorarum. 

 COLOR 



Although variable, color of P. d. noiicdis is most 

 frequently light brown; thus, the name camaron 

 acaramelado (candied shrimp) in Cuba and lan- 

 gostino amarillo in Venezuela. In certain areas it 

 is pink and is known as camaron rosado (pink 

 shrimp), whereas in other areas it is very dark 

 brown and is called camaron carbonero (coal-car- 

 rying shrimp) or camaron cocinero (cook shrimp). 



In the Antilles, this subspecies has a large, dark, 

 reddish-brown spot on each side at the junction of 

 the third and fourth abdominal somites, whereas 

 in northern South America, it consistently seems 

 to lack these large spots. 



Distribution and Morphological Variations 



In American waters, P. d. notialis ranges from 

 Cuba through the Greater Antilles to the Virgin 

 Islands and from Bahia de la Ascension, Quintana 



40- 



30 



20 



10 



N = 523 



/A 



/ \ 



/ 

 / 



/ 



0.25 0.75 1.25 1.75 2.25 2.75 



Vs 



Figure 34. — Percentage of distribution of keel-sulcus 

 (K/S) in Penaeus (M.) duorarum notialis P^rez Far- 

 fante. 



Koo, Mexico, along the Caribbean Coast of Cen- 

 tral America and South America and the Atlantic 

 Coast of South America to Sao Luis, Brazil. It 

 is apparently absent from northeastern Brazil, but 

 appears again in Illieus and extends south to Cabo 

 Frio (fig. 28) . Here, for the first time, P. d. notial- 

 is is recorded from the Caribbean Coast of Mexi- 

 co, north of the Gulf of Honduras. It is also found 

 in the eastern Atlantic, along the coast of Africa, 

 from Cap Blanc to Angola. 



A few specimens of this subspecies have been 

 reported beyond tlie northern and southern limits 

 of its range in the western Atlantic as given here. 

 I believe tliat those from northeast Florida re- 

 corded by Joyce (1965) are most likely members 

 of the small percentage of P. d. duorarum that 

 have a rather broad dorsolateral sulcus, as figure 

 23 shows. Although camaron acaramelado has 

 been mentioned from Baia de Guanabara, Brazil 

 (da Silva, 1965), it is doubtful that it reaches so 

 far south. I have examined specimens from that 



WESTERN ATLANTIC SHRIMPS OF GENUS PENAEUS 



523 



