996 MR. BELL, HORA CARCINOLOGICÆ ; 
to which that name has been attached. ‘The specimens in my possession were taken by 
Mr. Cuming at the Galapagos Islands. 
Genus Myra, Leach. 
Cuar. Gen.—Testa ovato-globosa, posticé tridentata. Orbita fissuris tribus profundis. Fosse anten- 
narie oblique. Pedipalpi externi caule exteriore ad marginem exteriorem dilatato. Pedes antici 
longissimi, graciles, manibus rectis. Abdomen Maris segmentis a tertio ad sextum,—Faminz a 
quarto ad sextum coalitis. 
Of this genus a single species only has hitherto been described; namely, Myra fugax 
of Leach (Leucosia fugax, Fabr.). To this I have now to add four new species, of all of 
which there are specimens in the collection of the British Museum and my own. In this 
genus there is a close resemblance on the one hand to Tlia, and on the other to Perse- 
phona. To the former it is connected by M. fugax, and to the latter by M. mammillaris; 
but from both it is distinguished by characters sufficiently marked. From Jia it is at 
once known by the absence of the peculiar twist of the hand, and from Persephona by the 
dilatation of the external stalk of the pedipalps. The five species are all natives of the 
Eastern Seas. 
Myra rucAx, Fabr. Testa subglobosä, in medio elevatä, non carinatä, spinà posticà 
medià lateralibus bis longiore, spinis lateralibus compressis. 
? Rumph. Mus. t. 10. f. C. 
? Browne, Jam. t. 42. f. 3. 
?? Cancer punctatus, Linn. Syst. Nat. p. 1054.36. ? Herbst, i. p. 89. t. 2. f. 15, 16. 
Leucosia fugax, Fabr. Suppl. p. 351. 
Myra fugax, Leach, Zool. Misc. iii. p.24. Edw. Hist. Nat. des Crust. ii. p.126; Rég. Anim. Cuv., Crust. 
.t.25.f.3. De Haan, Crust. Japon. p. 134. t. 33. f. 1. 
Hab. in mari orientali. 
There is considerable doubt as to the identity of this species with the figures above 
referred to of Brown and Herbst, as well as with the Cancer punctatus of Linnæus. The 
figure of Herbst very possibly belongs to M. carinata of this paper. 
MYRA AFFINIS, mihi (Tas. XXXII. fig. 2). Test ovato-globosä, spinis posticis brevi- 
bus, subzequalibus ; pedibus anticis thorace vix bis longioribus; manu digitis tertià 
parte longiore. 
Hab. ad insulas Philippinas. Mus. Brit. 
This species very much resembles Jf. fuga, but differs in several obvious characters, 
shown in the following comparative view :— | 
MYRA FUGAX. 
Anterior legs in the male three and a half times as 
long as the carapace. 
Fingers half the length of the hand. 
Middle spine long, acute, 
Male abdomen more than twice as long as it is 
broad, 
MYRA AFFINIS. 
Anterior legs not twice as long as the carapace. 
Fingers two-thirds the length of the hand. 
All the spines short and obtuse. 
Male abdomen much less than twice as long as 
broad. 
