28 Mr. E. J. Miers on the Squillidae. 



distal end. Each of the exposed thoracic segments is armed 

 with six, and the postabdominal segments with eight longitu- 

 dinal ridges (those of the lateral margins included), all except 

 the submedian ridges terminating posteriorly in a spinule ; on 

 the penultimate segment the submedian ridges also terminate in 

 small spines ; the terminal segment is armed with a greatly 

 thickened convex median dorsal ridge ; the lateral and poste- 

 rior margin is also greatly thickened in the adult. There are 

 from seven to ten tubercles between each of the spines of the 

 posterior margin ; the penultimate joint of the raptorial limbs is 

 armed with numerous immobile marginal spines, of which from 

 five to eight are larger (besides the mobile spines at base), and 

 the dactylus with eight very long spines. The basal portion of 

 the uropoda is greatly produced distally, and armed with two 

 strong spines. The length of the largest individual (a dried 

 female, from Borneo) is somewhat over 10|- inches. 



Hob. Indo-Pacific Region.- 



Specimens are in the Museum collection from the Indian 

 Ocean (General liar divicke), Borneo (A. R, Wallace, Esq.), 

 Philippine Islands (H. J. Veitch, -Esq.), and Zanzibar (Dr. 

 Kirk). The males in the collection are of small size, and do 

 not present any marked sexual distinctions. 



De Haan records this species from the Japanese seas as 8. 

 harpax. 



B. The exposed thoracic and the first to fifth postabdominal segments 

 with the dorsal surface smooth, without median tubercles or sub- 

 median carinse. The submedian spines of the terminal segment 

 usually furnished with a small mobile spinule at their distal ends. 



* Dactyli of the raptorial limbs armed with Jive marginal spines, 



Squilla Desmarestii. 



Sqidlla Desmarestii, Bisso, Crust, de Nice, p. 114, pi. ii. fig. 8 (181G) ; 

 Hist. Nat. Eur. mend, v. p. 86 (1826) ; Lamarck, Hist. Anim. sans 

 Vert, v. p. 188 (1818); Desm. Consid. Crust, p. 251 (1825); Latreille, 

 Encycl. Meth. x. p. 472 (1825) ; Eoux, Crust, de la Mediterrane"e, 

 livr. viii. pi. xl. (1830) ; Yarrell, Loud. Mag. Nat. Hist. vi. p. 230, 

 fig. 23 (1833) ; M.-Edw. Hist. Nat. Crust, ii. p. 523, pi. i. fig. 1 

 (1'837) ; White, List Crust. Brit. Mus. p. 84 (1847) ; Bell, Brit. 

 Crust, p. 354 (1853) ; Heller, Crust, siidl. Europa, p. 307 (1863). 



Carapace smooth, without traces of longitudinal carina?, 

 except close to the posterior margin, and with the cervical 

 suture obsolete in its posterior portion ; no spine at the antero- 

 lateral angles of the segments. Rostral plate oblong-oval, 

 smooth above, and rounded at its distal end. Spines of the 

 antennulary segment small ; no spines on the ophthalmic 

 segment. First exposed thoracic segment but little laterally 



