480 Stimpson on the Crustacea and Echinodermata 



islands, belongs to this division. They live under flat 

 stones, from half-tide to low-water mark, and represent the 

 Porcellance of warmer latitudes. 



DEEMATUEUS MANDTIL Brandt. 

 Dermaturus Mandtii, Brandt ; Melanges Biologiques, i. 57. 



Hab. Island of St. Paul. 

 Mus. Acad. Petrop. 



HAPALOGASTEE MEETENSII. Brandt. 

 Hapalogaster Mertensii, Brandt ; Melanges Biologiques, i. 58. 



Hab. Sitka, (Wosnessenski.) 

 Mus. Acad. Petrop. 



Tribe POKCELLANIDEA. 



POECELLANA EDWAEDSII. De Saussure. 



Porcellana Edwardsii. De Saussure ; Rev. et Mag. de Zool. v. 366. PL XI. f. 3. 



Carapax strigose ; surface of hands scabrous ; anterior 

 margin of carpus in the first pair of feet, and of the third 

 article in the remaining pairs, strongly toothed. 



Hab. Mazatlan, (Verreaux.) 



Mus. Paris. 



. POECELLANA EUPICOLA. Stimpson. 

 Plate ^TX. f. 2. 

 Porcellana rupicola, Stimpson; Proc. Bost. Soc. Nat. Hist. vi. 85. 



Carapax moderately depressed ; front triangular, consid- 

 erably deflected, with a blunt extremity, and a notch or 

 groove at the base separating it from the orbit. Surface of 

 the feet and anterior half of the carapax scarcely rugose, 

 with granules but slightly prominent. The portion of the 



i 



