CARCINOLOGICAL STUDIES. 83 



Greatest width of the cephalothorax , 

 immediately before the second in- 

 cision 15 mm. 17^/2 mm. 



Length of the cephalothorax . . . 10^/4 » I2V3 » 



Macrophthalmus hicarinatus Heller from the Nicobar Islands 

 is, in my opinion, identical with Macr. paa[/icMs Dana, the 

 only difference being the presence of the two granulated 

 lines on the postero-lateral sides of the upper surface of 

 the cephalothorax , which are not described by Dana. We 

 must, however, consider that Dana's specimen was very 

 small and that a slight pubescence is distinctly seen on 

 his figure 4 a, so that I suppose that the pubescent lines 

 were indeed also present in the original specimen of the 

 american author. Heller's figure of Macr. hicarinatus is bad ,• 

 the cephalothorax being figured too narrow. Our species 

 is most closely allied to Macr. tomentosus Eyd. & Soul, and I 

 at first thought our specimens to be young iudividuals of that 

 species of which an adult male from the Mergui Archipelago 

 lies before me. The species of Eydoux and Souleyet presents 

 indeed almost the same form of the cephalothorax , but 

 nearly the whole upper surface is distinctly 

 granulated, the immobile finger of the hands 

 of the male is slightly de flexed and the inner 

 margin of this finger is armed with a strong 

 tooth a little before the middle, whereas the 

 tooth of the dactylus is much smaller and 

 placed close to the articulation. 



20. My c t ir i s longicarpus Latr. 



Myctiris longicarpus, Milne Edwards, in : Annales Sciences naturelles, 

 Tome XVIII, 1852, p. 154. 



Myctiris dejiexifrons , de flaan , Fauna Japonica , Crustacea , p. 25 

 (sine descriptione). 



Two specimens, locality unknown. 



!N'otes from. th.e Lieyden AXuseum , Vol. ^XU. 



