PODOPHTHALMOUS CRUSTACEA. li 



The male which was anknown to de Haan, has much greater 

 claws than the female; they are equal in size, or the right 

 claw is larger in some individuals. The inner angle of 

 the carpopodite is armed with a short sharp spine as in 

 the female. The outer surface of the claw a little convex 

 without a keel which is found in the female. The dactylo- 

 podites and the immoveable fingers of the chelipedes are 

 provided with short blunt teeth and at the end excavated 

 like a spoon. 



We have also received two typical specimens of Hetero- 

 grapsus sexdentatus M. Edwards from Mr. Alph. Milne 

 Edwards , collected in New-Zealand , and so I am 

 enabled to state the differences of this species and of 

 the Heterogr. sanguineus de Haan. Firstly the suborbital 

 margin is provided in H. sexdentatus M. Edw. vdth a 

 row of large rounded granules , in H. sanguineus on the 

 contrary it is incised or crenulated only extremely subtilly 

 and superficially ; then the carpopodite of the chelipedes 

 has a blunt inner angle in H. sexdentatus , without a 

 spine, in H. sanguineus on the contrary with a sharp 

 spine, and lastly the clawfj of the chelipedes are fur- 

 rowed in H. sexdentatus, but for the rest quite smooth 

 without bristles ; in H. sanguineus they are provided with 

 some rows of short but stout dark bristles. The last somite 

 of the abdomen of the female is rounded in H. sanguineus 

 but is triangular in H. sexdentatus. The specimens 

 described by Heller (Novara-Reise , p. 52) as belonging to 

 Heter, sanguineus de H. , belong positively to H. sexden- 

 tatus M. Edw. — H. sanguineus de H. inhabites the seas 

 north of the Equator, but H. sexdentatus M. Edw. lives 

 south of this line. 



23. Heterog rapsus penicillatus de Haan. 



Grapsus , Eriocheir , penicillatus de Haan , Fauna Jap. 

 p. 60, pi. 11, fig. 6. Milne Edwards, Ann. Scienc. 

 Nat. p. 177. 



Notes from the Leycleu IMuseiim, 



