Boone, Crustacea, Cruises of ''Eagle" and ''Ara," 1921-28 101 



tive segments ; the third segment is about twice as long as the second, 

 and has a shield-shape area on the posterior half of the median region 

 with the apex of the shield rounded and directed forward ; its anterior 

 lateral margins are bordered by a series of raised, rounded bosses, as 

 shown in the drawing. The anterior and lateral parts of this third 

 segment are covered with forward-directed spines, those in the median 

 and extreme lateral region being much longer than the smallish 

 intermediate ones. The fourth, fifth and sixth segments successively 

 increase in length in the order named; the fourth segment has one 

 band of spines approximately midway the segment, and interrupted 

 in the median area ; the fifth segment has a similar band augmented 

 by a few small spines on the lower anterior lateral region. The sixth 

 segment has three such bands of spines, an anterior row, a median 

 row emphasized by two longer, submedian spines in the dorsal region, 

 and a scanter posterior row along the posterior margin of the segment. 

 The entire caudal fan has the same contour and proportion as does 

 that of S. hispidus, and the telson is similarly ornamented with two 

 paired longitudinal rows of articulated spines. 



The eyes and antennal appendages afford no specific characters. 

 The different length ratio of the antennary flagella, pointed out by 

 Rankin in the type, does not exist in the two adults before me. 



The legs, likewise, are quite similar to those of S. hispidus. The 

 fourth and fifth legs have the carpus and propodus multiarticulate ; 

 the carpus of the fourth leg with nine to twelve articles ; the propodus 

 with eight to twelve articles. 



Synonymy. — Stenopus scutellatus Rankin, Ann. New York Acad. 

 Sci., vol. 11, p. 242, pi. 29, fig. 3, 1898.— Boone, Bull. Bingham 

 Oceanog. Coll., vol. 1, art. 2, p. 83, figs. and 16, 1927. 

 fStenopus spinosus Rathbun, Rapport betreffende een voorloopig 

 onderzoek naar den toestand van de Visseherij en de Industrie 

 van Zeeproducten in de Kolonie Curacao, uitgebracht door Prof. 

 D. J. Boeke, part 2, 1920, p. 325, 1907.— Schmitt, Bijdr. tot d. 

 Dierkunde K. Zool. Genooschap Nat. Art. Magistra Amsterdam, 

 XXIII, p. 73, 1924. (Not Stenopus spinosus Risso, 1826.) 



Family: PENAEIDAE. 



Genus : PENEUS Fabricius, restricted. 



Peneus 'brasiliensis Latreille. 



Plate 30, text fig. 1 A, B. C. 



Type : Obtained on the coasts of Brazil ; deposited in the Paris 

 Museum. 



