244 



Stat. 297 is 11,5 mm - l° n gi carapace 13 mm., abdomen 30,5 mm., entire length 55 mm. The rostrum 

 of this rather small species, of which the female from Stat. 297 is regarded as the type, is but 

 little shorter than the carapace and reaches by a little more than one-third its length beyond 

 the antennal scale ; the two proximal third parts are slightly directed downward, the distal third 

 curved upward. Median ridge little prominent, traceable to near the faint fronto-gastric groove, 

 not elevated anteriorly above the lateral margins; midway between the tip and the anterior 

 pair of spines three or four transverse corrugations are visible. Anterior pair of spines just in 

 front of the eyes, posterior pair immediately behind the orbital margin, spines of the anterior 

 pair larger and more pointed than those of the posterior, the latter as far distant from one 

 another as the spines of the anterior pair, both pairs a little farther distant from one another 

 than are the spines of each pair; lateral margins between both pairs nearly parallel. Orbital 

 spine directed obliquely upward and forward, contiguous to the eye, so that, when the carapace 

 is looked at from above, the orbital spine is partly concealed by it and directed almost straight 

 forward; branchiostegal spine twice as long as the orbital spine, directed straight and 

 horizontally forward and reaching to the middle of the antennal scale and to the far end 

 of basal antennular article. 



Cervical groove well-developed. Anterior part of dorsal crest divided into five obtuse 

 tubercles of unequal length, the i st or anterior the longest, the 3 rd , 2 nd , 4 ,h and 5 th regularly 

 diminishine in length; j n front of the i st tubercle, though a little nearer to the median line T 

 a 6 th more conical obtuse tubercle is observed and as usual, in front of this pair, a small sub- 

 acute tubercle is seen in the middle line; 6 or 7 small granules occur anteriorly between the 

 two crests, but more than the posterior half of the surface between both is smooth. The two 

 dorsal crests slightly converge backward ; behind the cervical groove each crest consists of two- 

 tubercles, the anterior slightly longer than the anterior tubercle of the anterior part, the posterior 

 nearly as long. Anterior moiety of subdorsal crest formed by three subacute tubercles, of which 

 the i st should more rightly be regarded as a third rostral tooth ; this tooth is situated a little 

 nearer to the posterior rostral tooth than the latter to the anterior, it is also a little larger 

 than the two other teeth of this part, that are equal. The posterior half of the subdorsal crest 

 is also formed by three, low, obtuse tubercles, of which the middle is the longest, then follows 

 the 3 rd , then the i st or anterior. One observes on the gastric region between the anterior 

 tubercle of the dorsal and the second tubercle of the subdorsal crest, immediately behind the 

 fronto-gastric groove, a subacute tubercle of the same size as the last mentioned tubercle and 

 behind it one or two smaller granules. A small obtuse tubercle occurs likewise, immediately 

 behind the cervical groove, between the anterior tubercles of the posterior moieties of the 

 i st and 2 nd carinae and one or two exist more posteriorly. The hepatic region bears, posterior 

 to the base of the branchiostegal spine, a little nearer to this base than to the hepatic groove, 

 a rather blunt, longitudinal tubercle, that perhaps may be considered as a tracé 

 of the anterior moiety of the dorso-lateral crest, and one or two very small granules exist close 

 to the groove that separates posteriorly the hepatic from the branchial region; for the rest the 

 hepatic region is perfectly smooth. The posterior moiety of the dorso-lateral crest is divided 

 by two notches into three lobes or tubercles, the anterior lobe is the smallest or shortest and 



