239 



those of the anterior is just as long as the distance between the two spines of the posterior 

 pair; lateral margins between the two pairs slightly concave. 



The antennal spine is directed obliquely upward; in the male it is somewhat turned 

 outward, though not so much as in Glyph, longirostris (S.I.Smith) (Report Decap. Crust. 

 Albatross Dredgings. Wash. 1886, PI. IX, fig. 4) and reaches almost to the front border of 

 the eyes, when the carapace is looked at from above. The younger female from Stat. 76 agrees 

 with the male, in the full-grown female from this Station and in the larger specimen from 

 Stat. 48 this spine is hardly turned outward, contiguous to the eye, and in the former the tip 

 is even slightly curved inward, while it reaches to the distal third of the eye, in the youngest 

 specimen, finally, the spine is as much turned outward as in the male and reaches distinctly 

 beyond the front border of the eye. Branchiostegal spine hardly longer, directed slightly outward 

 and downward, as much as in Glypli. longirostris (S.I.Smith, I.e., PI. VIII, fig. 2). Compared 

 with those of Glyph. Sibogae de Man the orbital and branchiostegal spines show in Glyph, 

 megalophthalma a more slender form. 



The anterior tubercle of the anterior moiety of the subdorsal crest has a conical 

 form with the acute tip directed forward and a little outward, in Glyph. Sibogae this tubercle 

 is less prominent, blunt, rarely subacute ; the distance, measured in the median dorsal line, 

 between the line uniting the apices of the rostral spines of the posterior ]jair and the line uniting 

 the tip of this anterior tubercle of the subdorsal crest with that of its fellow at the other side, 

 appears in Glyph. Sibogae half as long as the length of the latter line, while in Glyph, 

 megalophthalma that distance measures little more than one-third the distance between 

 the anterior tubercle of the^ subdorsal crest and its fellow (Confer fig. 59 and fig. 60). As 

 regards the shape and the direction of the dorsal and subdorsal crests and the number of 

 tubercles, by which they are formed, this species resembles Glyph. Sibogae; the tubercles are 

 also eroded and corroded, but they are a little more prominent and more or less 

 subacute, the tubercles of the posterior moiety of the subdorsal crest are moreover a little 

 smaller. Hepatic and cervical grooves deep. Hepatic area a little swollen, with two small blunt, 

 conical tubercles near the anterior tooth of the lateral crest, situated behind one another and 

 of which the anterior is a little larger than the posterior. Posterior moiety of the dorso-lateral 

 crest as in Glyph. Sibogae, entire, straight, obsoletely sinuate just behind the middle and with 

 obtuse, anterior extremity; between this extremity and the anterior acute tubercle of the subdorsal 

 crest are situated on the upper border of the hepatic groove 4 or 5 hardly prominent tubercles, 

 of which the two anterior are smaller than the posterior. The anterior moiety of the 4''' or 

 lateral crest is broken by a shallow notch into two parts; the anterior part is produced 

 anteriorly to form a sharp spine or tooth, that is directed forward and outward and that has 

 the same size as the anterior conical, acute tubercle of the subdorsal crest; this spine falls 

 far short of the anterior border of the carapace. The part behind the notch forms merely 

 an obtuse angle, that projects much less laterally than the anterior spine. The posterior 

 moiety is also straight, entire, with obtuse anterior extremity, it is less prominent than the 

 posterior moiety of the dorso-lateral crest and quite posteriorly 2 or 3 small tubercles are 

 observed between the posterior extremities of both moieties. 



