Mr. C. Spence Bate on new Species of Crustaceans. 487 



rally produced to a strong anteriorly-curved point. The dorsal sur- 

 face is tolerably smooth, exhibiting but faintly the marking of the 

 internal viscera. The eyes are small, and reach but little beyond the 

 orbital margin. The external antennae have the first joint fused with 

 the carapace, the second and third compressed and arcuate, and ter- 

 minate in a smooth flagellum. The first pair of pereiopoda are mo- 

 derately long, having the meros triangulate, the upper angle forming 

 a prominent carina that extends along, but terminates abruptly a little 

 short of both extremities of the joint ; the carpus is tricarinated ; 

 the propodos is laterally compressed, and forms about half the length 

 of the limb, and is about one-third of its breadth. The dactylos is 

 slightly curved and slightly serrated on the inner margin, and anta- 

 gonizes at the extremity with the produced propodos. The second pair 

 of pereiopoda are nearly as long as the first, but much more slender, 

 having the meros and propodos subcarinated. The three posterior 

 pairs are shorter. The pleon is small and narrow, the second and 

 third segments being the broadest, while the seventh is abruptly nar- 

 rower than the sixth, and forms a triangular plate. The female dif- 

 fers from the male in being more protuberant over the stomachal 

 region, and consequently the rostrum is more depressed ; anteriorly, 

 there is less development of the lateral branchial teeth, and there is 

 a relatively greater distance between the fifth pair of pereiopoda. 

 The pleon is almost circular, and covers the entire surface of the 

 ventral region. 



The colour of the animal is of a reddish brown, which increases 

 in brightness as it approaches towards the extremity of the chelae. 

 In one or two young females the carapace was smooth and glabrous. 



Found in tolerable abundance in Esquimalt and Victoria Harbours, 

 and, indeed, in all the sheltered inlets along the mainland coasts from 

 the mouth of the Fraser to San Francisco. Dredged in about eight 

 fathoms of water, but easily obtained in pools at extremely low tides. 

 Its favourite haunt is under a large flat stone, or hid under the sea- 

 weed that fringes the margin of a pool. The specimen from which 

 the drawing was made was taken in Esquimalt Harbour. 



Oregonia longimana, n. s. 



Carapace coarsely granulated or minutely tuberculated, free from 

 hairs, except upon the rostrum, which is slender and twice the length 

 of the interorbital space. Pleon, in the male, narrow, concave upon 

 each side, corresponding with the fourth, fifth, and sixth segments. 

 Telson rather broader than the preceding segment, and emarginate at 

 the terminal extremity. The first pair of pereiopoda are very long, 

 being twice the length of the carapace, and much longer than in either 

 of the species described by Dana and Stimpson ; the meros reaches 

 quite to the extremity of the rostrum, and is furnished with two or 

 more longitudinal rows of small granulated tubercles ; the propodos 

 is rather longer than the meros, and its breadth is equal to about 

 one-third of its length ; the dactylos is about one-third of the length 

 of the propodos, slightly curved and minutely serrated on the inner 

 margin, which impinges throughout its entire length upon the pro- 



33* 



