44 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 
I have seen only two specimens, from which the following measure- 
ments, in millimeters, were taken: 
1 Poe 
OX einem coe a mecec as oo em erie ae tenn aes ae oe alee ome eee ply eile em mle = = alain nl rol 2 
Length, tip of-rostrum to top of telson ..~.~- -.2- 22-222. 22cm enw n ee noe 0 -- = omens 83. 0 70.0 
enein of carapax, cluding TOSpPaM. oo. ones sense ane ea ia ete ee eee ale oleate ele 43.0 39.0 
Mensh OL VOStMUaM (= == ec sane ee es ae iee seen nena wae are See cake 11.8 10.8 
Breadth of carapax at cervical suture 20.0 18.0 
Greatest breadth. .--- 24. 0 22.0 
Leneth of cheliped - 110.0 75+ 
Length of merus.-.- 41.0 29.0 
Length of carpus... 16. 0 14.0 
Length of chela .... 48. 0 28+ 
GON CGH OMAR CLV IUS erm pene eecias eens ce ann cle aie a ee ele iets Seat se does: 20a eaeeer 
enpth\ofiirst ambulatory log) 2a. ss asceein == 2 eeedenene cee eRe eins © newitele seme ian eee 77.0 62.0 
GTOAUEN OTA GLELIOMO VC ete te re oe e eels mote aca tee elm eben ote ete etme ele tesla wei 5. 2 5.0 
en cihiol telson cess seo cec cee s seace cece «cals cesisebelae eine ence bolsacet ema atemicu ome asaya 10. 0 9.7 
ISiNEL NOMA Cre Tes) ia) ES See hee ee eee oe OR ee oncon ac che ase mconeecorseassersoc 16. 0 14. 0 
Station— N. lat. | W. long. | Fathoms. | serine, 
fo] / °o / 
UTR) aR ene eeeaaisibeinc OS" Gere Bon sdoodaeseeeoooHs 39 56 70 35 245 1g 
I ene a taal feelers aoe cee nines meee ee een ee ele ee rtaters 40 OL 68 54 640 1¢ 
Humunida, gen. nov. 
The single species of the genus here proposed has the general ap- - 
pearance of Munida, but is at once distinguished from it and all the 
allied genera by the five-spined front, the position and structure of the 
peduncles of the antenne, the absence of branchiz at the bases of the 
external maxillipeds, the very broad and transversely segmented telson, 
and the absence of appendages upon the first five somites of the abdo- 
men of the male. 
The carapax is strongly contracted below anteriorly, so that the 
peduncles of the axtenne are near together and immediately beneath 
the well-developed eyes. The proximal segment of the peduncle of 
antennula is slender, subcylindrical, but with a small protuberance 
near the base where the auditory organ is situated, and unarmed. The 
peduncle of the antenna is highly developed and armed with numerous 
spines, of which one is articulated by a broad base to the second seg- 
ment and evidently represents the antennal seale. The oral appendages 
and thoracic legs are similar to those of Munida, but there are neither 
branchiz nor epipods at the bases of the external maxillipeds, though 
in other respects the branchial formula is the same. The telson is short 
aud broad, more or less membranaceous, and divided by a transverse 
articulation, so that the distal part may be folded beneath the basal 
part. The female has well-developed appendages, all apparently ovig- 
erous, upon the second to the fifth somite of the abdomen, but there 
are no appendages whatever on any of the first five somites in the adult 
male. 
Eumunida picta, sp. nov. (Pl. 2, Fig. 2; Pl. 3, Figs. 6-10; Pl. 4, Figs. 1-3a.) 
The carapax at the posterior part of the branchial region is about as 
