450 DE. J. G. DE MAN ON CEUSTACEA CHIEFLY 



E.— COAST OFF BAHIA. 



Pen.eus (Pen^us) brasiliExVSIS, Lati*. 



J'enaus brasiUensis, Latreille, in Nouv. Diet. Hist. Nat. xxv. p. 256 (1817) ; Miers^ in Proc. Zool. Soc. 

 1878, pp. 299, 306; von Martens, in Archiv f. Naturgeschichte, xxxviii. Jahrg. 1872, p. 140; 

 Ratlibuu, ill U.S. Fish Commission Bulletin for 1900, vol. ii. p. 100. 



Pive young specimens, dredged in a depth of 2^2 fathoms off Bahia. 



The largest specimen is 80 mm. long from the tip of the rostrum to the end of the 

 telson, the smallest measures 65 mm. In all the basipodite of the first and second pairs 

 of legs is armed with an acute spine, as also the ischium of the first pair ; the third pair 

 of legs is unarmed. In each specimen the lower margin of the rostrum is armed with two 

 teeth ; in tliree specimens the anterior of these teeth is placed just below the foremost 

 -tooth of the upper border, in the two others the posterior tooth is placed below it. In 

 two specimens the upper border is armed with nine teeth, in one with ten, in two with 

 eleven, and in all the first four teeth are placed upon the carapace. 



According to Miss Rathbun, the carina on the fourth segment of the abdomen is very 

 .sharp in adult individuals which are 165 mm. long ; in our younger specimens this carina 

 is still only faintly developed. Otlierwise these specimens agree with the descriptions 

 in the references given above. 



SICYONIA, H. M.-Edw. 

 SicYONiA scuLPTA, H. M.-Edw., var. ? 



Skyoniu scul/jta, H. Milne-Edwards, Hist. Nat. Crust, ii. p. 409; Heller, Die Crustaceen des siidlichen 

 Europa, 1863, p. 29.1 ; Spence Bate, Report ou the 'Challenger' Macrura, p. 294, pi. 43. fig. 1. 



Two females without eggs and one male were dredged off Bahia at a depth of 

 2^ fathoms. 



Sicyonia sculpta, which inhabits the Mediterranean and Adriatic Seas, has also been 

 captured off St. Vincent, Cape Verde Islands, by the ' Challenger ' Expedition, and the 

 'Challenger' specimen seemed, according to the auth(n" of that Report, to agree with 

 the Mediterranean species. When I now, however, compare the three specimens caj)tured 

 off Bahia with a specimen ( $ ) from Messina belonging to the Strassburg Museum {vide 

 Ortmann, in Spengel, Zool. Jahrb., Syst. v. 1890, p. 453), I observe indubitable 

 differences. 



The two females are 40 mm. and 34 mm. long from the tip of the rostrum to the end 

 of the telson, the younger male measures 32 mm. The specimen from Messina is 37 mm. 

 long. The principal differences are the following : — The rostrum of the Mediterranean 

 specimen projects almost horizontally forward, exactly as in the 'Challenger' female 

 (Spence Bate, /. c. fig. 1), but the rostrum of the three American specimens is more 

 obliquely directed upward, the straight lower margin, indeed, making an angle of about 

 30° with the upper border of the carapace. As regards the teeth on the latter and on 

 the rostrum, the American specimens agree with that from Messina, but the third tooth, 



