326 



f l Proportion between the length of the large chela and that 

 of the fingers 2,2, according to Coutière, 2,5; this chela 



2,5-times as long as high èis-incisiis de Haan 



(W. DE Haan, Fauna Japon. Crust. 1849, p. 179, Tab. XLV, fig. 3). 



f„ Proportion between the length of the large chela and that 

 of the fingers 2,75; this chela about 2,5-times as long as 

 high. Rostrum one and a half as long as wide at its base. 



bis-incisus de Haan var. Malensis Cout. 

 (H. COUTIÈRE, Alpheidae Mald. and Laccad. Archip. 1905, p. 910, PI. LXXXVI, 

 fig. 48). 



/ 3 Proportion between the length of the large chela and that 

 of the fingers 2,6; this chela 2,4-times as long as high. 

 Rostrum narrower than in the variety Malensis, sometimes 



not flattened above èis-incisus de Haan var. variabilis de Man 



e„ Larger chela as in A. parettchirus Cout., with the lower mar- 

 gin hardly emarginate, 3-times as long as high, the fingers 

 measuring little more than one-fourth the length of the chela. 

 Rostrum 3-times as long as wide at its base. Three posterior 



legs very slender prosenchirus de Man 



d 2 Rostrum not flattened above. 



£ x Rostrum sharply carinate above, with the narrow, prominent 

 and compressed rostral carina running backward to beyond 



the posterior third of the carapace Cotdierei de Man 



e % Rostral carina reaching at most to the base of the orbital hoods 



or just beyond it. 



f x Both the larger and the smaller chela armed with a spiniform 



tooth at either side of the articulation of the dactylus. 



Merus of both chelipeds with a spine at the apex of 



infero-internal margin Jwplocheles Cout. 



(H. COUTIÈRE, in: Notes from the Leyden Museum, XIX, 1898, p. 197). 



f„ No spiniform tooth at either side of the articulation of the 

 dactylus of both the larger and the smaller chela. 

 g^ Groove or depression on the supero-internal surface of the 

 larger chela not triangular, but U-shaped, the margins 

 perpendicular to the upper margin of the palm. 

 //j Rostral carina quite distinct, extending backward to 

 just beyond the orbital hoods. Terminal spine of 

 scaphocerite reaching almost with half its length 

 beyond the tip of the rather narrow lamina. Merus 

 of 3 ld legs 3,5-times as long as wide ... . Bouvieri A. M. E. 



(H. COUTIÈRE, Alpheidae Mald. and Laccad. Archip. 1905, p. 907, PI. LXXXV, 

 fig. 44). 



194 



