126 Memoirs of the Indian Museum. [Voi,. IV, 



another spine which is stout and much shorter. The proximal segment of the outer 

 uropod bears the usual series of movable spines along its external margin. As in L. 

 acanthocarpus there is on the ventral side a small fixed spine and a setose lobe project- 

 ing over the articulaton of the ultimate segment (fig. 98). 



The type specimen is pale in colour with scattered dark chromatophores on the 

 carapace, which are closely aggregated near the posterior margin (fig. 95). The 

 rostrum is sprinkled with similar chromatophores which are thickest proximally. On 

 each of the free thoracic and abdominal somites there is a broad transverse dark band 

 separating narrow anterior and still narrower posterior borders. On the first five 

 abdominal somites the dark band shows a tendency to become divided by a narrow 

 and obscure, transverse, pale stripe. The colouring of the sixth somite and of the 

 telson is shown in fig. 97. The peduncular segment of the uropods is dark as is also 

 the inner ramus. There is a dark spot near the distal end of the proximal segment of 

 the exopod and the outer segment is suffused with dark pigment at the base. 



Thanks to the kindness of Mr. J. C. Moulton, I have had an opportunity of ex- 

 amining the only known example of this species, and I have been able in consequence 

 to supplement Nobili's account with figures and a few further details. 



The type of Lysiosquilla tigrina is a male, 45 mm. in length. It was found at 

 Santubong, Borneo, and is preserved in the Sarawak Museum. 



10. Lysiosquilla vicina, Nobili. 



1904. Lysiosquilla vicina, Nobili, Bull. Mus. Hist. Nat., X, p. 229. 

 1906. Lysiosquilla vicina, Nobili, Ann. Sei. Nat., Zool. (9), IV, p. 339. 



This species is founded on a single small specimen in which the raptorial claws are 

 wanting. It appears to be allied to L. tigrina ; but is distinguished by the following 

 characters : — 



1. The rostrum is trispinous, each antero-lateral angle being acutely produced. 



2. The posterior ventral border of the sixth abdominal somite is smooth and with- 



out spines. 



3. As in L. tigrina there are four pairs of large primary teeth on the margin of the 



telson, but the stout additional spine, which occurs in that species below the 

 proximal lateral tooth, is missing. 

 L. vicina seems to be easily distinguished from all other known species of Lysio- 

 squilla by the trispinous rostrum, and from all except L. tigrina by the four pairs of 

 long fixed spines on the margin of the telson. 



The type and only known example, a male only 27 mm. in length, was found at 

 Obock in the Red Sea in sand inhabited by Balano gloss as. 



n» Lysiosquilla insignis, Kemp. 

 Plate IX, figs. 99-102. 

 1911. Lysiosquilla insignis, Kemp, Rec. Ind. Mus., VI, p. 94. 

 The carapace is smooth, longer than its greatest breadth and is obtusely angled 



