576 BULLETIN 54, UNITED STATES NATIONAL MUSEUM. 



HOLOPHRYXUS ALASCENSIS Richardson. 



Holophryxus alascensis RICHARDSON, Bull. U. S. Fish Comm., XXIV, 1905, pp. 

 220-221. 



Localities. Vicinity of Yes Bay, Behm Canal; vicinity of Funter 

 Bay. Lynn Canal. 

 Depth. 147 to 350 fathoms. 



Body of female irregular in outline. Color uniformly light yellow. 

 Head represented by a bilobed prominence anterior to squarish body. 



FIG. 639. HOLOPHRYXUS ALASCENSIS. a, DORSAL VIEW OF FEMALE, x 3}. b, LATERAL VIEW OF 



FEMALE. X 3. C, VENTRAL VIEW OF FEMALE. X 3J. 



Eyes wanting. Dorsal surface of thorax with no trace of segmenta- 

 tion. A few lines only are present, representing creases or folds in 

 the integument and having no relation to suture lines. 



The abdomen projects below the thorax, although there is no dis- 

 tinct boundary between these two divisions of the body, as a triangular 



process without any trace of segmentation and with 



no appendages. 



Uropoda and pleopoda are entirely wanting. 

 In a lateral view the first 



five segments of the thorax 



are represented by the five 



coxal plates, which bound 



the oral area, and are not 



separated by sutures from 



the dorsal surface of the 



body. On the ventral side 



the oral area is bounded 

 anteriorly by the head and laterally by the two divergent rows of 

 coxal plates. The antennae and antennulae are quite rudimentary. 

 The antennae seem to be composed of three joints, the antennulaeof two. 

 There are five pairs of legs, surrounding the oral area, situated just 

 within the two rows of coxal plates. From the bases of these legs 

 five pairs of incubatory plates arise, the last pair overlapping in the 

 middle ventral line. 

 No males were found. Three specimens were taken by the U. S. 



FIG. 640. HOLOPHRYXUS 

 ALASCENSIS. MAXILLI- 



PED. X 27}. 



FIG. 641. HOLOPHRYXUS 

 ALASCENSIS. FIRST IN- 

 CUBATORY LAMELLA (DIS- 

 TAL LOBE). X 27}. 



