1894. • PBOCEEDINGS OF THE NATIONAL MUSEUM. 539 



LomUti/. — There are in the colleeticu one male and tlire<' leiiiales, 

 broiiglit by J. B, Beruadou, IT. S. Navy, then of the U. 8. S. Alert, 

 from Nagasaki, Japau, and sni)posed to be from Korea (No. 14110, U.S. 

 N.M.) ; two males collected by P. L. Jouy iu 1885 at Fusan, Korea (No. 

 1212G, LT.S.N.M.) ; a small female from Japan, purchased of H. A. Ward 

 (No. 1501*8, U,S.N.]\r,), and a much smaller one from Yokohama, Japan 

 (No. 0317, U.S.N.M.); two specimens from the IT. S. S. Pahs (No. 5115, 

 U.S.N.M.), and a number collected by R. Hitchcock in Jaimii (No. 

 13940, T'.S.N.M.), and by W. Stimpson at Hongkong- (No. 2004, U.S- 

 N.M.). 



SC^UILLA ALBA, B i jr c 1 o w. 

 Plate XXII. 

 Squilla alha, Bk;elow, .lohns Hopkins Univ. (,'irc., lOti, p. 10.'!, 18Ho. 



Diagnosis. — A species possessing very large triangular eyes, the cor- 

 neal axis being oblique; a pair of large raptorial claws with six teeth 

 on the dactylus; an ovate rostrum with obsolete carina'; a carapace 

 with five carinse, the median one not bifurcated in front, with the 

 anterior lateral angles produced into spines, and the posterior lateral 

 angles rounded; no ventral spines, but two lateral lobes on each side 

 of the first exposed thoracic segment, the anteiior one being large, 

 strongly curved forward and acute, the posterior one short and rounded ; 

 rounded lateral margins on the next two segments, not bilobcd; eight 

 carina^ on the abdominal segments; a nearly smooth telson with a low 

 crest ending in a spine and a few curved lines of continent i)its upon 

 its dorsal surface; six marginal spines and between them live to six 

 submedian, twelve intermediate, and one lateral denticle; a large 

 rounded lobe on the inner tooth of the basal prolongation of each uro- 

 pod and one in the angle between the two teeth. 



General description. — This is a well-marked and striking s}»ecies. 

 The color of the living specimens at once attracts attention. Except 

 for the corneal region of the eyes, which is yellowish, the whole animal 

 is a pure opaque white, marked by only a few symmetrically and defi- 

 nitely placed minute bhick spots, the positions of which are shown in 

 pi. XXII. The shape of the animal is also peculiar. The c;irapa(!eand 

 the exposed portion of the thorax are equal in length and together 

 make uj) about four-ninths of the total length of the body. The seg- 

 ments in front of tlie carapace are also elongated so tliat the rostrum 

 does not completely cover the first antennary segment. Moieover, the 

 eyes are unusually large, so that the whole cephalothoracic region has 

 a drawn-out appearance, not well shown in the figure. The rostrum 

 isovate and nearly smooth, the median and lateral carina' Ix'ing only 

 faintly marked. 



The general surface of the carapace is smooth and polished; the 

 median carina is not bifurcated in front, but stops short some distance 

 before it reaches the anterior edge of the carapace. Tlie lateral carinie 



