I II 



part, bounded at either side by a small ridge and an anterior that terminates anteriorly in two 

 horns. In the female of P. latistdcatus this posterior part is shorter than the anterior, the two 

 horns are comparatively large and separated by a broad interspace. In P. plebejus, however, 

 the posterior part is larger than the anterior, that is deeply excavate on its outer side, and 

 the two horns are very small and almost contiguous. This protuberance has been quite wrongly 

 figured by Spence B.\te : as a plate not in contact with the lobes. The sternal somites between 

 the three pairs of chelate legs are longitudinally carinate in both species. 



Probably the petasma of the male of P. plebejtis, which is still unknown, will also show 

 some differences. 



Concerning the type specimen of P. canaliculaUis var. aicstraliensis Sp. Bate Dr. Calman 

 of the British Museum kindly wrote me the following: "The specimen is about io6 mm. long 

 (not loo mm. as given by Spence Bate). The accessory carinae are present, just as you describe 

 them in P. plebejtis, but the groove which defines each on the inner side from the rostral teeth 

 becomes indistinct in front of the fourth tooth, so that, on the rostrum itself, the acce.ssory 

 ridges are only a little better defined than the slight ridges occupying the same position in 

 P. canaliculahis. Posteriorly, however, the accessory ridges are quite distinct and end just 

 behind the first tooth. 



The double loop of the post-ocular ridge is well-marked in Spence Bate's type, 

 exactly as in your figure. The rostral formula is 7, with four teeth on the carapace, and the 

 lower tooth between the two foremost upper teeth". 



General distribution; Tokyo Bay and Kagoshima, Japan (Kishinouye) ; Penang 

 (Lanchester) ; Batjan (de Man) ; Red Sea (de Man). 



Subfamily Sicyoninae Ortmann. 

 Sicyonia H. M.-Edw. 



The genus Sicyonia H. M.-Edw. is represented at present by about 20 species, most of 

 which are found in the Indopacific. Sic. carinata Olivi, with which Sic. sciclpta H. M.-Edw. is 

 identical, inhabits the Mediterranean and the Adriatic Seas, but has also been observed off the 

 Cape Verde Islands by the "Challenger" and it has been recorded from Goree Island, Sene- 

 gambia ; a variety americana de Man, described in : The Transactions of the Linnean Society 

 of London, 1907, occurs on the east coast of South America oft" Bahia. It is noteworthy that 

 this species has been recorded in 1905 by Dr. Pearson from Trincomalee, under the name of 

 Sic. sculpta and in 19 10 by Dr. Borr.vdaile, according to the papers quoted by him, from 

 Haddumati Atoll, Maldive Islands, under the name of Sic. carinata (Olivier). Four other species 

 occur also in the Atlantic. Sic. Edzvardsi Miers, with which Sic. carinata of H. Milne-Edwards 

 and of the Challenger Report is identical, inhabits the West Indies, while it ranges northward 

 to Charlotte Harbour and Sarasota Bay, Florida, and southward to Bahia and Rio de Janeiro. 

 Sic. brevirostris Stimps. is found on the coasts of Cuba and Florida and extends its range 

 northward to Cape Hatteras. Sic. dorsalis Kingsley occurs in the West Indies and on the coast 



