334 University of California Publications in Zoology. [Vol.6 



Length : 5.8] mm. 



Coloration: Very transparent, with a brown spot around the mouth. 

 Occurrence: Station 1339, vertical from 310 f., sounding 330 f., July 

 21, 19110. 



This species appears to resemble A. rattrayi Scott, in the 

 shape of the head ; but the differences seem to me to be specific. 



Augaptilus pyramidalis n. sp. 



PI. 26. figs. 1, 9; pi. 30, fig. 69; pi. 32, fig. 106. 



Adult female. As seen from above the forehead is smoothly 

 but rather sharply rounded | pi. 2ti, fig. 1) ; in side view the fore- 

 head is pyramidal in shape and overhangs the rostrum, which 

 is very strong and heavy (pi. 26, fig. 9). The posterior margins 

 of the thorax are rounded (pi. 26, fig. 9). The cephalothorax 

 is 5-segmented and the abdomen 3-segmented; the former is six 

 and one-half times as long as the latter with the furca. The 

 head is as long as the thorax plus the abdomen and furca ( pi. 26, 

 fig. 9). The genital segment is as long as the rest of the a In lu- 

 men and furca. 



The anterior antennae reach to the posterior border of the 

 second segment of the thorax. The rami of the posterior anten- 

 nae are of equal lengths; the mandibular blade is of a similar 

 structure to that in A. macrodus. The bristles of the maxillipeds 

 are well equipped with augaptiloid cups. 



The rami of the first pair of feet are 2- jointed and the first 

 joint of the outer ramus has an unusually long and heavy spine 

 (pi. 30, fig. 69) ; the rami of the other pairs of feet are 3- jointed 

 and the end joints of the inner rami have 7, 8, 8, 7, 6 bristles in 

 the five pairs respectively. 



Length: 6.68mm. 



Coloration: Very transparent and without pigment. 



Occurrence: Station 1557, tow with closing net at 250 f., July 17, 1908. 



The shape of the head in this species recalls that of A. horri- 

 dus Farran (1908. p. 78, pi. 8, fig. 29), but the head protrudes 

 more in .1. pyramidalis and the rostrum is heavier and longer. 

 It is interesting to note that both the species mentioned lack the 

 brown spot around the mouth, though that is a common feature 

 of the larger transparent forms like those described here. 



