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Glyph'. longirostris (S. I. Smith) and to Glyph. vicaria Faxon, of which the former is found on 

 the east coast of the United States, the latter off the Galapagos Islands. Numerous specimens, 

 which in 1891 had been taken by the "Albatross" off the Galapagos Islands and in the 

 neighbouring seas, were first referred by Faxon, though with some doubt, to Glyph. nobilis 

 \. M.-Edw. in his great work, published 1895, on the Stalk-eyed Crustacea obtained by that 

 expedition, but in the following year, when he had the occasion of studying specimens of the 

 true Glvph. nobilis A. M.-Edw., captured by the "Blake" in the Gulf of Mexico, the species 

 from the west coast was recognized by him as a distinct form to which the name of vicaria 

 was given (W. Faxon, in: Buil. Museum Comp. Zool. at Harvard College. Vol. XXX, N° 3. 

 Cambridge, Mass., 1896, p. 159, footnote). Unfortunately this Glyph. vicaria has never been figured. 

 The whole body of Glyph. megalophthalma is covered with a close velvety tomentum. 

 The length of the rostrum and of the carapace, measured from the level of the orbital margin 

 respectively to the apex of the former and to the posterior margin of the latter, in the median 

 dorsal line, proved to be the following: in the adult ova-bearing female from Stat. 76 13,5 mm., 

 22 mm., in the other female 15 mm., 17,5 mm., in the adult male 13 mm., 17,3 mm. and in 

 the two young specimens from Stat. 48 12 mm., 14 mm. and 13,2 mm., 12 mm. These 

 numbers indicate that in the full-grown female, the largest of all the specimens, the rostrum is 

 one-third, in the adult male one-fourth shorter than the carapace and that in the other 

 younger specimens the rostrum is also shorter than the carapace, though the difference is less, 

 except in the younger specimen from Stat. 48, that is the smallest of all, measuring 55 mm. 

 from tip of rostrum to tip of telson, for here the rostrum is a little ( 1 / 10 ) longer than the carapace. 

 As results from Faxon's description of 1895 the rostrum of Glyph. vicaria is constantly much 

 longer. Like in other species the rostrum is at first a little turned downward and the rest 

 curved upward, in the full-grown female from Stat. 76 this distal upturned part measures one- 

 fourth, in the other specimens about one-third the whole length of the rostrum from the apex 

 to the orbital margin-, in the full-grown specimen the tip curves upward to the level of the 

 subdorsal crest of the carapace, in the other specimens it reaches almost the level of the upper 

 border of the carapace. The rostrum extends in the full-grown specimen from Stat. 76 only by 

 one-sixth of its length beyond the apex of the antennal scale, in the other specimens by one- 

 third or nearly so, excepting the youngest specimen where it projects almost by half its length 

 beyond the scaphocerite. The median carina of the upper surface that is traceable to the base 

 of the rostrum, is anteriorly distinctly elevated above the lateral margins in the male and in 

 the other specimens, though hardly in the adult female; at either side of it the upper surface 

 is smooth, in Glyph. vicaria, however, transversely corrugated. The grooved lower 

 border of the rostrum appears anteriorly in the male and in the youngest specimen indistinctly 

 carinate in the middle line, in the other specimens a median ridge does not seem to be developed. 

 The anterior of the two pairs of spines, with which the rostrum is armed, reaches just beyond 

 the front border of the eyes, while the posterior pair stand above the orbital margin ; the spines 

 of both pairs are sharp and acute, those of the posterior are a little shorter than the spines 

 of the anterior and as long as broad at base, those of the anterior distinctly longer than broad 

 at base. The distance of the line uniting the spines of the posterior pair from the line uniting 



