locality identified as "P. duorarwn^'' but they were 

 actually P. paulensis. 



The bathymetric distribution of P. d. notiaUs 

 seems to extend to water much deeper than has 

 been previously reported. The greatest dej^ths at 

 which this subspecies was known to live were 60 to 

 65 fm. (Perez Farfante, 1967), but a single male 

 was caught at 400 fm. off Punta Broqueles, Colom- 

 bia, Oregon Sta. 4902. It was taken witli other 

 penaeids — Hymenopenaeim roiustus Smith, Aris- 

 taeomorpha folmcea (Kisso), Plesiopenaeus ed- 

 wardsianws (Johnson), and Arlsteus antilUnsis 

 Bouvier — which occupy water deeper than that 

 in which Penaeus usually live. On the basis of this 

 record, it seems possible that cajnaron acaramelado 

 occasionally may wander into water as deep as 400 

 fm. Moderately large concentrations of P. d. notia- 

 7k are found in tlie Greater Antilles in 2 to 15 fm., 

 in the Gulf of Venezuela in 20 to 25 fm., and off 



Honduras, Nicaragua, and the northeast coast of 

 South America higher densities are found in 

 deeper water, 34 to 35 fm. 



Penaeus d. notialis is remarkably uniform 

 throughout its range in American waters. Among 

 the few variations that exist is the relative length 

 of the third laereopod. Altliough its length varies 

 rather considerably, it seems to me that little 

 systematic importanc« can be attached to this char- 

 acter in the western Atlantic. For example, in a 

 single locality I found females with a carapace 

 of 40 mm. in whicli the length of the carpus — 

 which is indicative of the length of the third 

 pereopod — ranges from 26 to 29 mm.; in turn, 

 females with 36 and 40.5 mm. c.l. have a carpus 

 of 29 mm. (fig. 38). Furthermore, in large females 

 from the Golfo de Darien to Islas San Bernardo, 

 Colombia, tlie carpus is considerably longer than 

 in the females of the same size from neighboring 



30 



S 

 2 



O 



z 



1/7 

 < 



20- 



10- 



D 



• P. a. subtil is 

 D p. d. notialis 



n 





a o S 



DD D 



••D D»» 



n^ 



a □• • 

 • • 



•n«o • 

 „ D 



°i^*' 



D D •• 

 flfi 



D g • 



D • • 



8" 



_L 



_L 



J_ 



10 15 20 25 30 35 



CARAPACE LENGTH (MM. 



40 



45 



50 



55 



Figure 38. — Carpus length-carapace length relation in Penaeus (M.) aetecus aubtUis Perez Farfante and Peiiacus {M.) 



dtiorarum notialis P^rez Farfante. 



WESTERN ATLANTIC SHRIMPS OF GENUS PENAEUS 



525 



