1879.] THE COREAN AND JAPANESE SEAS. 25 



nearly half as long as the carapace, the spines of which it is 

 composed divergent near their extremities, and armed on their under- 

 sides with two or three spinules. Anterior legs with the arm and 

 wrist covered with small spines ; arm with a strong conical curved 

 spine on the upper margin at its distal extremity ; palm robust, about 

 as long as the arm, with fewer spinules arranged in longitudinal series ; 

 fingers naked. Ambulatory legs with numerous small spinules- 

 the terminal joints, and in the last pair the two preceding joints are 

 without spines and hairy. Length of carapace to base of rostrum 

 f inch, breadth about -^-^ inch ; length of anterior leg 3^ inches. 



This species was obtained at a depth of 63 fathoms, in October 1874 

 in lat. 34° I' N., long. 136° 20' E. 



A single male individual was collected. As it is certainly one of 

 the most striking novelties in the collection, I have much pleasure in 

 dedicating it to its indefatigable discoverer, Capt. H. C. St. John, 

 R.N. 



AcHiEUS SPINOSUS, sp. n. 



Carapace triangular, narrowed behind the orbits, as in Jckceus 

 (Inachus) lorina, and armed with six spines above, viz. one on the 

 gastric, one (which is bilobate) on the cardiac, and two on each 

 branchial region ; there are also two or three small spines or tubercles 

 on the sides of the body, beneath the hepatic and branchial regions. 

 The rostrum, as in all the species of the genus, is very small and 

 bilobate. Eye-peduncles robust, laterally projecting and armed with 

 a strong tubercle in front. Anterior legs (in the male) robust ; arm 

 and wrist with a few scattered granules above ; palm swollen, with 

 about six spinules on the upper margin and a few small granules on 

 the lower margin, near its base ; fingers acute, with a wide hiatus at 

 base when closed, both the fingers with a strong tooth on their inner 

 margins near the base ; both are faintly cristated on their outer mar- 

 gins. Ambulatory legs very slender, the terminal joint of the last 

 pair strongly falcated. Terminal postabdomiual segment subtri- 

 angular. Length \ inch, breadth I inch. 



A single specimen (male) was collected at a depth of 30 fathoms, 

 in lat. 34° 10' N., long. 136° 47' E. 



The nearest ally of this species seems to be the AchcEus lorina 

 {Inachus lorina. Ad. & White, Zool. Samarang, Crust, p. 3, pi. ii. fig, 

 2, 1848), from Mindanao, from which it differs in the number and 

 disposition of the spines of the carapace. Both of these species exter- 

 nally resemble Inachus, but differ in the absence of defined orbits 

 and in the falcated posterior legs, on account of which they must be 

 referred to AchcBus. 



ACH^US TUBERCULATUS, Sp. H. 



There are several specimens of a species of Achceus in the collection, 

 which are all unfortunately in an imperfect condition, the anterior 

 and most of the ambulatory legs being absent. The carapace is tri- 

 angular and broader than in the preceding species, without spines, 

 not constricted behind the interocular region ; the regions are con- 



