188 University of California Publications in Zoology [Vol.11 



Augaptilus romanus n. sp. 



PI. 10, figs. 7, 24; pi. 11, figs. 30, 32; pi. 12. figs. 4.5, 47, 52 



Adult male. The body is much depressed, and the head and 

 po-sterior margins of the last thoracic segment are rounded. The 

 rostral filaments are slender and delicate and borne on a promi- 

 nent beak-like eminence which is set in an indentation in the 

 front of the head (pi. 10, fig. 2'4). The cephalothorax is about 

 four times as long as the abdomen and furca. 



The last segment is the longest of the abdomen and the 

 genital segment is next, then the second, third, and fourth in 

 order (pi. 10, fig. 7). 



The non-grasping antenna is 25 jointed and 5.4 mm. long; 

 the portion of the grasping antenna proximal to the geniculation 

 is 17- jointed (the rest was broken off). The inner ramus of the 

 posterior antenna is twice the length of the outer ramus (pi. 11, 

 fig. 30). The blade of the mandible is shown in plate 11, figure 

 32. The bristles of the maxillipeds have the buttons, and the 

 posterior maxilliped is extremely long and slender. The outer 

 ramus of the first foot (pi. 12, fig. 45) has distinctive characters; 

 the fifth feet, also (pi. 12, figs. 47, 52) are easily recognizable 

 from the figures. 



Length: 4.5 mm. 



Coloration : Transparent and nnpigmented. 



Occurrence: Haul 2081. 



While this specimen was taken in the same haul with A. 

 californicus, there is no other reason, so far as I can see, for 

 considering the two as male and female of the same species. 



Augaptilus simplex n. sp. 



PI. 10, figs. 10, 28; pi. 11, fig.s. 34, 36, 41; pi. 12, figs. 50, 60 



Adult female. The head is regularly and broadly rounded; 

 there are no rostral filaments, but the rostrum appears to be 

 represented by a nodular protuberance, the lower one of the two 

 shown in plate 10, figure 28. The last thoracic segment is 

 rounded at the sides; the cephalothorax is about four and one- 



