PUGETTIA LORDII. 265 



mud. The sea-bottom in and adjacent to the 

 numerous bays, harbours, and long canals which, 

 like the fiords of Norway and Sweden, every- 

 where intersect the mainland and inland coasts 

 varies in accordance with the character of the 

 bounding rocks : where trap, soft clay slates, or 

 felspathic rocks form the coast-line, a thick blue 

 clay is the usual bottom; where grit and sand- 

 stones, there it is sandy. 



Little, if indeed anything, is as yet known of 

 the deep-sea productions from the west side of 

 the Island, which will afford a rich harvest to 

 future explorers. 



PUGETTIA LORDII, N. S. Carapace quadrate 

 behind the orbits; the anterior portion abruptly 

 narrowing, and produced into a double rostrum, 

 the horns of which divaricate. The anterior 

 extremity of the orbital margin is produced to a 

 sharp point that is, elevated slightly above the 

 beak; the posterior extremity is defined by a 

 distinct fissure. The anterior hepatic region is 

 produced by a tooth immediately posterior to 

 the postorbital fossa, laterally extended to an 

 obtuse tooth or point, and posteriorly separated 

 from the branchial regions by a decided fossa or 

 lateral constriction. The branchial region is 

 laterally produced to a strong anteriorly-curved 



