22Ó 



in Glyph. hastacauda this small tubercle does not exist. In both species the distal third is 

 curved upward and the lower border grooved, with a median ridge anteriorly. 



The orbital spines that are directed obliquely upward, run straight forward, when 

 the carapace is looked at from above, as far forward as the eyes ; in Glyph. hastacauda they 

 reach not so far forward and are distinctly turned outward. Branchiostegal spine directed straight 

 forward, as long as the orbital spine, by which it is wholly concealed, when the carapace is 

 looked at from above. 



Dorsal crests almost parallel, converging but very slightly backward, anterior portion 

 divided into 6 or 7, posterior into 4 or 5, low obtuse tubercles; quite anteriorly at the inner 

 side of each dorsal crest there is a small subacute tubercle and, like in other species, between 

 them and a little more forward, a similar tubercle exists in the middle line near the transverse 

 furrow; behind this meclian tubercle 3 or 4 still smaller ones occur in the middle line. Between 

 the two dorsal crests the gastric region bears at either side a longitudinal row of 5 or 6 very 

 small granules and, immediately behind the cervical groove, between the anterior pair ot 

 tubercles of the posterior portion, one observes at either side of the middle a similar small 

 granule. The anterior portion of the subdorsal crest is broken up into 4 tubercles ; the anterior, 

 larger than the others and acute, is situated at the continuation of the lateral margins of the 

 rostrum, like in other species, and should more rightly be described as a third rostral tooth ; 

 this tooth is separated, like in Glyph. assii/iilis and other species, by a longer interval from 

 the 2 nd than the following from one another. The 3 following decrease in size backward, the 

 2 nd is also acute and sharp, the two posterior obtuse. Posterior portion of 2 nd crest divided into 

 4 or 5 low obtuse tubercles, of which the 2 nd is a little longer than the rest; in one female 

 there are on the left side but 3 tubercles, of which the middle one is as long as the 2 nd and 

 3 rd of the right side. Between the dorsal and subdorsal crests are situated several obtuse or sub- 

 acute granules of unequal size, on the gastric region just outside the dorsal crest a longitudinal 

 row of 9 or 10 small granules and S or 9 larger ones more laterally. Posterior division of 3 rd 

 or dorso-lateral crest smooth with obtuse anterior extremity, between the latter and the anterior 

 tooth of the subdorsal crest are situated 3 or 4 subacute small tubercles on the upper border 

 of the groove that separates the hepatic from the gastric region, like in Glyph. assimilis. 

 Between the posterior portion of the 2 nd and 3 rd carinae are situated 9 or 10 small granules 

 in a longitudinal line. The anterior portion is formeel, like in Glyph. hastacauda, by a smooth 

 crest that runs from the orbital spine backward to near the cervical groove and there are one 

 or two granules between this groove and the posterior extremity of the crest. In one specimen 

 2 small granules are observed, a little behind the orbital margin, at each side of the rostrum, 

 on the orbital region and a third granule exists quite posteriorly, near the groove separating 

 the hepatic from the gastric region ; one observes in the other female on the hepatic area 

 posteriorly 3 or 4 granules, but no granules anteriorly. Fourth or lateral carina as in Glyph. 

 hastacauda, posterior portion subacute distally, anterior terminating in a sharp tooth ; the 4 th 

 carina and the posterior portion of the 3 ld prove to run parallel with one another and with 

 the upper border of the carapace, in a lateral view of the latter. There is a longitudinal row 

 of 10 or 11 small granules midway between the posterior portion of the 3 rd and 4" 1 carinae 



