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by the "Challenger", measured 38 mm. and the specimens from the island of Flores, described 

 by me in 1892, were still younger. 



Carapace nearly one-third the total length, smooth and glabrous like the abdomen. 

 Rostrum, both in the male and in the female from Buton-strait, a little shorter than the eyes, 

 projecting straight forward, acute, 6+1 toothed; the epigastric tooth, a little smaller than 

 the first tooth on the straight, horizontal, upper margin, is slightly farther distant from the 

 frontal margin of the carapace than from the cervical groove. The six teeth are equidistant, 

 two are situated on the carapace, the y^ above the frontal margin ; they gradually decrease 

 in size from the 1^' to the 6'*^ and the distance between the i^' and the epigastric tooth 

 measures two-thirds the distance between the latter and the cervical groove ; the foremost tooth 

 is twice as far distant from the tip as from the penultimate. The lower margin of the rostrum 

 is slightly emarginate at the base and curves upward to the tip. 



Orbital angle not dentiform, post-antennular (antennal) spine rather small; behind and 

 just above the latter is situated the post-orbital spine that is a little larger; hepatic spine of 

 the same size as the antennal, no branchiostegal or pterygostomian spine, but the 

 prominent, posterior margin of the subhepatic groove, i. e. the anterior part of the cervical 

 groove, overhangs somewhat the rounded antero-inferior angle of the carapace as an obtuse, 

 but dentiform lobe, around which the subhepatic groove curves backward before reaching 

 the margin of the carapace. As in So/. Afe/afif/io, there is a distinct, though shallow groove 

 running transversely a little way behind and below the post-orbital spine and meeting the 

 cervical groove just in front of the hepatic spine. The branchiostegal groove runs horizontally 

 backward below the hepatic spine, but it does not extend beyond the upper extremity of the 

 cervical groove. The deep, cervical groove does not indent the upper border of the carapace ; its 

 upper extremity is decidedly farther distant from the posterior margin of the carapace than from 

 the anterior. The rostral crest terminates near the extremity of the cervical groove, posterior 

 to it the carapace is rounded. Fourth, fifth and sixth abdominal terga sharply carinate, the 

 third is also carinate, but the carina is much less prominent and disappears before reaching the 

 anterior margin ; the third tergum is one and a half as long as the second, which is 4-times 

 as long as the first. Sixth somite one and a half as long as the fifth and about as long as the 

 telson ; the telson that reaches to the distal third of the inner uropod and just beyond the 

 middle of the outer, is distinctly channelled and carries two small spines at the posterior fourth. 

 Eyes large, reniform ; basal joint of the eye-peduncles with lamelliform tooth or process on the 

 inner side above ; terminal joint with a minute tubercle on the inner margin. 



Antennular peduncle somewhat shorter than the scaphocerite, measuring two-thirds the 

 length of the carapace, without the rostrum; prosarthema somewhat shorter than the eyes. 

 Flagella of equal length, as long as the carapace without the rostrum; both are 

 compressed, the lower, convex on the outer and concave on the inner side, is nearly one and a 

 half as broad as the upper, both end abruptly-acuminate, but, while the upper appears equally 

 broad along its whole length until close to the tip, like a band, the other distinctly narrows 

 distally; the four flagella form together an efferent branchial tube, characteristic of the genus. 



Basal joint of outer antennae with a small spine at the outer angle, peduncle as long 



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