94 Bulletin, Vanderhilt Marine Museum, Vol. Ill 



segments are smooth, each with one transverse groove, which is accen- 

 tuated by a band of silky, fine, brownish golden setae. The lateral 

 angles of the somites are produced into acute teeth, directed pos- 

 teriorly. In addition to this strong tooth, all somites, except the first 

 one, have each a small, short, acute tooth at the postlateral angle. 

 The median posterior margin of the sixth segment is irregularly den- 

 ticulated. The telson has the proximal portion thickened and denticu- 

 lated; the distal portion is more pliable, truncated, with the margin 

 truncated, slightly rounded. The peduncle and outer proximal por- 

 tion of each blade of the caudal fan is calcareous, thickened, with the 

 inner distal-lateral margin denticulate, the remaining distal portion 

 of the blades similar to that of the telson and ornamented with longi- 

 tudinal rows of spinules and setae. 



The eyes are set on calcareous stalks, constricted below the cornea. 

 There are a pair of submedian forward and upward-directed spines 

 on the anterior part of the antennal segment, and, roughly speaking, 

 in line with the rostral or preocular horns. The antennulae are slen- 

 der ; the first joint elongated, smooth ; the second and third joints sub- 

 equal, each about half as long as the first article ; the whips are sub- 

 equal, about as long as the peduncle, setose. 



The antennae are distinctly slenderer than are those of P. argus, in 

 specimens of the same size. P. guttatus has the proximal joint thick- 

 ened, armed with two distal spines on the outer lateral margin; the 

 second article is longer than the first, slenderer, with the upper and 

 distal margin set with big spines; the third joint is similar to the 

 second, almost as long, but slenderer, spinose ; the whip is three to four 

 times as long as the peduncle, composed of very short rings set with a 

 series of sharp spines and bristling with setae on the ventral surface. 

 The legs are typically Panulirid, each with the propodus striped 

 longitudinally with alternating lines of green and yellow. 

 Synonymy. — Palinurus guttatus Latreille, Ann. du Mus., vol. 3, p. 

 393, 1804; Encycl., pi. 315; Nouv. Diet. d'Hist. Nat., t. XVII, 

 p. 295, 1817.— Olivier, Encycl., t. VIII, p. 672, 1811.— La- 

 MAECK, Hist, des Anim. sans Vert, t. V, p. 210, 1818. — Desma- 

 REST, Consid. sur les Crust., p. 185, 1825. — H. Milne Edwards, 

 Hist. Nat. Crust., vol. 2, p. 297, pi. 23, fig. 1, 1834.— Von Mar- 

 tens, Archiv. fur Naturg., ser. 2, vol. 38, I, p. 125, 1872. 

 Panulirus guttatus Spence Bate, Rept, Voy. "Challenger," Zool., 

 ■ vol. 24, pp. 78-79, pi. Xa (variety). — Verrill, Trans. Conn. Acad. 

 Arts and Sci., vol. 26, p. 17, pi. IX, fig. 2, 1922. 



