352 Puget Sound Marine Sta. Pub. Vol. 1, No. 30 



D. Rostrum bifid. phyllolithodes (p. 354) 

 DD. Rostrum not bifid. rhinolithodes (p. 354) 



CC. Carapace without deep pits. 



E. Abdomen membranous; carapace spiny. 



ACANTHOLITHODES (p. 355) 



EE. Abdomen with calcareous plates; carapace tubercled. 



LOPHOLITHODES (p. 356) 



Genus Cryptolithodes 



1. Cryptolithodes typicus Brandt, butterfly crab, turtle crab (fig. 5) 

 Rostrum broad, rectangular, cilrved slightly downward, not distall}' 

 widened. Eyestalks enlarged at base and curved upward. Antennular 

 scales flat, leaf-like, irregular in form. Carapace very wide, with edges 

 so extended and deflexed as to form a shield completely covering the whole 

 animal, uneven in elevation, tubercled on the wing expansions at the 

 joining of the anterior-lateral and posterior-lateral margins; median ridge 

 extending from the rostrum to the posterior part of the body ; teeth ob- 

 scure, those on antero-lateral margin small ; blunt tubercles on edge much 

 more prominent in the older than younger specimens. Abdomen crossed 

 by transverse lines. Chelipeds varying greatly in size ; hands warty, with 

 elevations in longitudinal rows with stiff hairs, with a large elevation on 

 distal end of propodus and one on proxinal end of dactyl. Walking legs 

 rough ; last pair folded in branchial chamber. Color blackish brown on 

 dorsal side, light gray on ventral side. Largest specimen examined was 

 52 mm. wide and 43 mm. long from tip of rostrum to posterior margin. 



Two specimens at 7 fathoms between Turn Island (9) and San Juan 

 Island (10) ; also one at 7 fathoms off Canoe Island (16). Not abundant. 



Genus Hapalogaster 



1. Hapalogaster mertensii Brandt. (fig. 6) 



Rostrum a short sharp spine, not as long as the eye-stalk. Anten- 

 nules short, thick. Antennae longer than the carapace, banded, slightly 

 hairy ; antennular scale a short horny spine. Carapace roughly heart- 

 shaped ; marginal teeth from anterior almost to posterior end, curving 

 toward the anterior end, small at the posterior end, gradually increasing 

 in size until quite prominent at anterior end, all but one posterior to cer- 

 vical groove with tufts of stiff bristles from their tips ; cardiac groove 

 deep, extending to margin, dividing carapace into two portions ; posterior 

 portion very much broader than anterior; whole surface covered with 

 tufts of stiff erect bristles, with a fringe of soft hairs bordering the pos- 

 terior margin. Abdomen soft and sac-like, not completely folded under 

 the thorax, dorsal and ventral surface of abdomen covered with tufts of 



