CRUSTACEA OF THE MEE&ITI AT?CHIPELAGO. 95 



•which I had sent to him, with the typical specimens of Latreille's 

 T. indica, which is closely allied to this species. According to 

 Prof. Milne-Edwards, T. StoliczTcana differs from T. indica by 

 the more dilated branchial regions, by the less profound gastro- 

 branchial groove, by the more sharply defined protogastric (epi- 

 gastric) lobes, and by the deeply emarginate frontal margin, 

 which in T. indica is entire. 



T. StoliczTcana is also allied to T. Larnaudii, Alph. Milne-Edw,, 

 a species which not only inhabits Siam but also the island 

 of Sumatra, as I indicated some years ago in my Note on 

 the Crustacea collected by the Dutch Sumatra Expedition (de 

 Man, Crustacea, in P. J. Yeth's 'Midden-Sumatra,' Leiden, 

 1880, iv. pt. xi. p. 2, pi. i.). Prof. Milne-Edwards having sent 

 me a typical specimen of T. Larnaudii from Siam, I am enabled 

 to describe the characters by which this species may be distin- 

 guished from T. Stoliczlcana. In T. Larnaudii the epibranchial 

 teeth are situated closer to the external orbital angles, so that the 

 distance between the epibranchial teeth and the external orbital 

 angles is comparatively shorter. It is in consequence of this 

 difference that both species present an entirely different outer 

 appearance. The front is more granular in T. Larnaudii, and less 

 profoundly emarginate; the postfrontal crest, of which at least the 

 external portions are straight and entire in T. Stoliczlcana, pro- 

 ceeding continuously and uninterruptedly to the epibranchial 

 teeth, is in T. Larnaudii much more interrupted not only in its 

 inner or epigastric, but also in its external portions, which are 

 not prolonged in an uninterrupted line to the epibranchial teeth. 

 In my figure of the Suraatran T. Larnaudii this latter character 

 has unfortunately not been correctly represented. In T. Lar- 

 naudii the antero-lateral and epigastric regions are more trans- 

 versely rugose, and the inflected subhepatic and pterygostomian 

 regions, which are smooth or nearly smooth in T. Stoliczlcana, are 

 covered in the former with numerous oblique and transverse 

 rugose lines. 



The largest specimen of T. Stoliczlcana in the Collection, a 

 male, is 52 millim. broad and 39 millim. long (the abdomen not 

 included), the proportion of the length to the breadth being as 

 3 : 4, the same as in Wood-Mason's typical specimens. 



T. Stoliczhana was discovered at Penang, and is a species proper 

 to the islands which are situated near the western coast of the 

 Malayan peninsula. 



