CRUSTACEA COLLECTED IN PUGET SOUND, N.A. 271 



Crustacea collected by Dr. W. A. Herdman, F.K.S., 

 in Puget Sound, September, 1897 : — 



BEACHYOCEKA. 



Family Cancrida. 



Genus Trichocarcinus, Miers, 1879. 



Trichocera, De Haan, Fauna Japon., Crust., p. 16, 1833. 



Trlchocera, Dana, Crust. U.S. Expedn., p. 299, 1852. 



Trichocarcinus oregonensis, (Dana), PI. XV., fig. 2. 



Two adult males and two young ; the largest measures 

 31 mm. long by 42 mm. wide. In the adult the regions 

 are very strongly defined ; the teeth on the antero-lateral 

 margin are very granulose, and have lost the alternately 

 spined character described by Dana. 



Trichocarcinus recurvidens (Sp. B.). PI. XVV, figs. 1 — 16. 



Platyearcinus recurvidens, Sp. Bate, P.Z.S. 1864. p. d63, Ann. and 

 Mag. Nat. Hist., 3rd Series, vol. XV., p. 488, June, 1865. 



Carapace 19 mm. long by 23 mm. wide divided into a 

 number of prominent areolae of which the surfaces are 

 flattened and granulated ; they are separated by deep 

 interspaces. The tw T o gastric lobes are the most pro- 

 minent, between these is an irregularly shaped small 

 tubercle, and on each side of them a somewhat crescent 

 shaped areola. Behind these are 2 small and a row of 8 

 moderately large areolae reaching across the carapace ; 

 behind these are a number of small areolae. The antero- 

 and postero-lateral margins are ill defined ; the former has 

 10 teeth (including the orbital) which are convex on the 

 upper surface, widening distally, and inclined upwards, 

 whence probably the specific name. The frontal margin 

 is 3 mm. wide and 3-lobed, the centre lobe smaller than the 



