20 Mr. E. J. Miers on new or little-known 



to the afferent branchial aperture, but is continued beneath 

 the margin of the carapace. 



All the specimens are females. The smallest of all (length 



4 lines) bears ova. In two of intermediate size, the smaller 

 tubercles of the carapace are nearly obsolete. 



Lambrus Iceviearjjus, sp. n. (PI. V. fig. 4.) 



Carapace scarcely broader than long (to base of rostrum), 

 with numerous tubercles on its upper surface, and four small 

 spines in a longitudinal median series, of which one is on the 

 gastric and three are on the cardiac region ; there are also two 

 spines on each branchial region. The lateral marginal tuber- 

 cles (about twelve in number) are small, and similar to those 

 of the surface of the body. The front is moderately promi- 

 nent, triangular, acute, with a tubercle on each side near the 

 base. Anterior legs with the arm spinose and tuberculate 

 above, the teeth granulated and principally disposed in three 

 longitudinal series of alternately larger and smaller ones on 

 the anterior and posterior margins and upper surface ; there are 

 about seven larger teeth on the anterior and posterior margins, 

 and four on the upper surface ; the wrist is spinose on its 

 posterior margin, granulated on the anterior, and smooth 

 above ; the anterior margin of the hand is armed with sixteen 

 to eighteen granulated tubercles, which are larger toward the 

 distal extremity ; the upper surface is flat and smooth, with 

 about a dozen tubercles in an irregular longitudinal series ; on 

 the posterior margin are about seven larger granulated tuber- 

 cles alternating with smaller ones. The under surface of the 

 anterior legs is perfectly flat and smooth, and the inner margin 

 of the under surface of the hands is finely granulated. The 

 tubercles on the merus joints of the ambulatory legs are very 

 small. Length (to base of rostrum) and breadth about 



5 lines. 



Hob. Eastern seas (II. M.S. l Samarang '). 



This species is remarkable for the perfect smoothness of the 

 under surface of the anterior legs and of the upper surface of 

 the wrists. It presents also another character which is rarely 

 found among the species of Lambrus ; the basal (i. e. the real 

 second) joint of the outer antennas is larger than the next 

 joint. 



Lambrus longimanus ? 



p Cancer, lomqimanm $, Linn. Mus. LucL Ulr. p. 441 (1704); Syst. Nat. 



p. 1047 (1700). 

 Lambrus lonyimanns, M.-Edw. Hist. Nat. Crust, i. p. 354 (1834). 



Carapace depressed, much broader than long, with shallow 



