34 
det tandformige Fremspring i det ydre Hjorne tydeligt frem- 
ragende. Det midterste Halevedhseng i Spidsen lige af- 
skaaret, ikke udrandet i Midten, og bev*bnet med 6 smaa 
Torner. Legemet af hvidagtig Farve, kuu i den forreste 
og bagerste Del forsynet med rpdligt Pigment. Lsengden 
ikke overskridende 65 ra ". 
Pindesteder: Stat. 35, 124, 137, 164, 192, 251, 286, 
312, 359, 362. 
Bemserkninger. Skjondt sserdeles nserstaaende fore- 
gaaende Art er den her omhandlede Porm dog let kjendelig 
fra samme red sin betydelig ringere Storrelse, Legemets 
forskjelbge Farvetegning, de forlioldsvis betydelig sto'rre og 
morkt pigmenterede 0ine, de korte Svober paa lste Par 
Polere samt ved Antennebladenes temmelig afvigende Porm. 
Beskrivelse. Kropformen er temmelig slank og zirlig, 
forpvrigt sterdeles lig samme lios foregaaende Art. 
Rygskjoldet (se Pig. 27) bar fortil en meget svagt 
udprceget dorsal Kjol, der som oftest ganske mangier det 
tandformige Fremspiring, som findes ber bos foregaaende 
Art. Kun hos et Par Exemplarer har jeg fundet en svag 
Antydning til samme. Pandedelen er betydebg kortere end 
bos foregaaende Art og raekker kun omtrent til Midten af 
0inene, naar disse strsekkes fortil. Den er som bos hin 
Art tretandet i Enden; men den midterste Tand eller det 
egentbge Pandehorn er her meget kortere og mindre spidst 
udtrukket. 
Pagkroppens 3die Segment er som hos foregaaende 
Art oventil noget puklet, med den bagre Hand dannende en 
triangulfer Fortsats, der boier sig ud over det folgende Seg- 
ment; men denne Portsats er her kjendebgt kortere. 2det 
Segments Epimerer er hos den aegbaerende Hun saerdeles 
brede og bar det forreste Hjorne noget spidst udtrukket. 
0inene (se Fig. 27) er forlioldsvis betydelig staerkere 
udvikede end hos foregaaende Art og naesten af paeredannet 
Porm, med 0iepigmentet af den saedvanlige morke Farve. 
lste Par Foleres Skaft forholder sig omtrent som bos 
B, leucopis; derimod er den indre Svobe her meget kortere 
og kun hoist ubetydehgt laengere end den ydre samt meget 
tynd, bprsteformig (se Pig. 27). 
2det Par Foleres Blad (ibid.) er ogsaa her meget 
stort, naesten af hele Rygskjoldets Laengde, men viser en 
temmelig afvigende Porm. Det er nemlig aflangt-ovalt eller 
naesten rhomboidalt, med den storste Brede betydelig mindre 
end den halve Laengde og Enden meget skraat afskaaret i 
Retningen indenfra ndad samt noget buet og besat med 
tydeligt udviklede, skjondt korte Randborster. Den fra det 
ydre Hjorne udgaaende tandformige Portsats er temmelig 
stor og frit fremragende. Svpben er forholdsvis kortere end 
hos B. leucopis. 
Munddelenes og Poddernes Bygning stennner i alt 
vaesentlig saa noie overens med samme hos foregaaende Art, 
tremity obliquely truncate, and armed with distinct, though 
short, marginal bristles; dentiform projection at the outer 
corner jutting distinctly forward. Telson truncate at the 
extremity, not emarginate, and aimed with 6 small spines. 
Colour of body whitish, anterior and posterior parts faintly 
tinged with reddish pigment. Length not exceeding 65’"™. 
Locality. — Stats. 35, 124, 137, 164, 192, 251, 286, 
312, 359, .362. 
Remarks. — Though very closely approximating the 
preceding form, the species here treated of may be easily 
distinguished by its considerably smaller size, the different 
colouring of the body, the much larger and darkly pig- 
mented eyes, the short flagella on the 1st pair of an- 
tennal, as also the somewhat deviating form of the an- 
tennal scales. 
Description. — Porm of body rather slender, and 
graceful; for the rest, closely resembling that in the preceding 
species. 
The carapax (see fig. 27) is furnished anteriorly with a 
dorsal carina, very slightly developed, and as a rule ex- 
hibiting no trace whatever of the dentiform projection observed 
here in the preceding species. In one or two specimens 
only, have I detected a faint indication of this character. 
The frontal area is considerably shorter than in the pre- 
ceding species, and reaches to only about the middle of 
the eyes when the latter are anteriorly extended. As in 
that form, it is tridentate at the extremity; but the medial 
tooth, or, strictly, the rostrum, is much shorter, and less 
acute. 
The 3rd segment of the posterior division of the body 
is, as in the preceding species, somewhat hunched above, 
with the posterior margin forming a triangular prolation, 
that arches over the succeeding segment; but this prolation 
is here perceptibly shorter. The epimera of the 2nd seg- 
ment in ovigerous females are exceedingly broad, and have 
the foremost corner somewhat sharply produced. 
The eyes (see fig. 27) are comj>aratively more devel- 
oped than in the preceding species, and almost pyriform 
in shape, with the ocular pigment of the usual dark colour. 
The peduncle of the 1st pair of antennae about as in 
B. leucopis ; the inner flagellum, however, is much shorter, 
and but very little longer than the outer, as also extremely 
slender, and setiform (see fig. 27). 
The scale of the 2nd pair of antennae (ibid .) . is here, 
too, very large, well-nigh equalling the whole of the cara- 
pax in length, but with a somewhat deviating form. It 
is oblongo-oval, or almost rhomboidal, with the greatest 
breadth considerably less than half the length, and has the 
extremity very obliquely truncate, and somewhat arched, as 
also beset with distinctly developed, though short, marginal 
bristles. The denticle extending from the outer corner is 
rather large, and projects freely. The flagellum is relatively 
shorter than in B. leucopis. 
The structure of the oral appendages and of the legs 
agrees so closely in all essential particulars with that ex- 
