72 Memoirs of the Indian Museum. [VOupLy. 
The following two small specimens may probably be referred to this species; 
they differ, however, from the other examples in having the lateral margins of the 
rostrum rather strongly convergent :— 
a Port Blair, Andaman Is. J. Wood-Mason. Id, 26 mm. 
4520 
= Persian Gulf, 53 fms., ‘Investigator.’ 1107531 mm: 
26° 20’ N., 53° 54’ E. 
The following specimens from the British Museum collection have also been 
examined :— 
Holothuria Bank, China Seas. P. Basset Smith. Id, 43 mm. 
(Pocock, 1893, sub S. affinis.) 
The anterior bifurcated part of the median carina of the carapace is obsolete. 
Kowlson Bay, Hongkong. P. Basset Smith. Id, 44mm. | 
(Pocock, 1893, sub S. affinis.) | 
Port Darwin, N. Australia. * Alert.’ Id, 61 mm. | 
(Miers, 1884, sub S. nepa.) , 
Singapore. S. F. Flower. Id ,92 mm. 
The var. perpensa is distributed over an area extending from Hongkong and N, 
Australia to the Persian Gulf, entirely replacing the typical form in the western part 
of its range. I have seen no specimens from Japan or the northern coasts of China. 
25. Squilla interrupta, Wood-Mason, MS. 
Plate V, figs. 60-—62. * 
? 1852. Squilla oratoria, Dana, U.S. Explor. Exped., Crust., I, p. 621. 
1893. Squilla affinis, Henderson, Trans. Linn. Soc., Zool. (2), V. p. 453 (partim). | 
Squilla interrupta, WWood-Mason, MS. (partim). ‘ 
1908. Squilla interrupta, Lloyd, Rec. Ind. Mus., IT, p. 32 (partim; sine desc.). 
1911. Sguilla interrupla, Kemp, Rec. Ind. Mus., VI, p. 98. 
This species differs from S. ovatoria,s.s. in the following constant characteristics :— 
1. The median carina of the carapace is interrupted at the base of the anterior 
bifurcation as in S. ovatoria var. perpensa (fig. 60). 
. The rostrum is subquadrate ; its anterior margin is truncate (sometimes even a 
trifle concave) and its lateral margins are only very slightly convergent ante- 
riorly (fig. 60). 
3. The eyes are distinctly smaller than in S. oratoria or its variety, specimens of 
similar size being compared. In the smallest examples in the collection 
the corneal index is about 5:0, in the largest about 6:1, while in individuals 
between 80 and go mm. in length, the figure usually falls between 5:2 and 55. 
4. The carpus of the raptorial claw is constantly provided with two, and only two, 
dorsal tubercles (fig. 61). 
5. In the bifurcate process from the base of the uropod the margin of the longer 
spine anterior to the external lobe is never concave ; it is occasionally feebly 
sinuous, but in nearly every instance,is definitely convex (fig. 62). 
nN 
