116 Mr. E. J. Miers on the Squillidse. 



riorly, with the anterior and posterior margins straight, the 

 antero-lateral and postero-lateral angles rounded. Rostrum 

 smooth, transverse, and somewhat triangular in form, acute 

 at its distal end. First exposed thoracic segment not pro- 

 duced on the side ; second and third segments with the lateral 

 processes rounded. Lateral margins of the first to fifth post- 

 abdominal segments ridged ; ridges ending in a small spine 

 on the fourth and fifth segments. There is an oblique shallow 

 depression on the sides of each of these segments, which in 

 the fifth segment is margined externally by a distinct ridge ; 

 the sixth segment is armed with eight longitudinal ridges, 

 which terminate usually in spinulcs, and with two smaller 

 prominences near the base. Median crest of the terminal 

 postabdominal segment much elevated, interrupted near the 

 base, and ending in a spinule ; on either side of it are three 

 obtuse crests. The marginal teeth are greatly developed, flat- 

 tened, ridged above, and terminate in spines, those of the two 

 terminal teeth being mobile. The antennules and antennas are 

 nearly of equal size. The dactyli of the raptorial limbs are 

 armed with a cutting- edge on their inner margins, an (J with 

 two distant teeth besides the terminal spine. The distal pro- 

 longation of the base of the uropoda ends in two strong spines ; 

 and the series of spines on the outer margin of the penulti- 

 mate joint of the outer ramus are flattened and considerably 

 elongated. Length of an adult male about 6 inches. 



Hab. Indo-Pacific Region. 



It is remarkable that all the specimens of this widely 

 distributed species in the Museum collection are males. 



The series includes examples from the Mauritius {General 

 Hardwicke and Lady F. Cole) , Zanzibar (Dr. Kirk) , Mada- 

 gascar (A. Newton, Esq.), Seychelles (Dr. E. P. Wright), 

 (Samoa Islands (Rev. 8. J. Whitmee), and two or three with- 

 out particulars respecting locality. 



Gonodactylus japonicus. 



Gonodactyhis Echcardsii, Berthold, Abhandl. konigl. Gesellsch. Wis- 



senscb. Gottingen, iii. p. 30, pi. iii. fig. (1847). 

 Gonodacti/lns japonicns, l)e Haan, Faun. Japon., Crust, p. 225, pi. li. 



fig. 7 (1849). 



This species is very nearly allied to Gonodactylus scyllarus, 

 but may be distinguished by the following characters : — 

 The rostrum is sinuated on the sides, and has the tip more 

 obtuse and strongly incurved. The sides of the postabdo- 

 minal segments are without the wide shallow impression of 

 G. scyllarus. There is a distinct median cannula between the 

 submedian keels of the sixth segment. There are from five to 



