248 BULLETIN OF THE 
Bóhm's genus Gnamptorhynchus. The presence of dactyli in the first pair 
of legs and the differences in the antennæ appear, however, to warrant the 
separation. 
Scæorhynchus armatus, sp. nov. 
Plates II. and V. 
Body slender, segments constricted in the middle, Lateral processes longer 
than the width of the body, widely separated. The two anterior pairs are 
directed somewhat forwards, the two posterior somewhat backwards. Each 
has a very prominent conical vertical spine near its outer end. an the median 
line of each of the three hinder segments of the body is a similar, though some- 
what shorter spine. 
Oculiferous segment as long as the rest of the body to the base of the abdo- 
men, narrow, with nearly parallel sides. A little behind the middle is the very 
prominent, acute, conical oculiferous tubercle, Ocelli rudimentary, without 
pigment. 
Abdomen slender, clavate, two thirds as long as the oculiferous segment. 
The rostrum (Fig. 4) has been partially described above. At its point of 
attachment its diameter is not more than one fifth that of the widest part. 
Mouth large, triangular, with three powerful chitinous jaws and three fleshy 
lips corresponding in position with the jaws. 
* Antenne” a little more than one third the rostrum, directed straight for 
wards, separated by a considerable interval ; the oculiferous segment is not ai 
all emarginate between them. There are two equal cylindrical joints followed 
in the female (Fig. 27) by a very small swollen rudimentary chela, and in the 
male (Fig. 26) by a still small but well developed chela with long, slender, 
curved unarmed claws. 
Palpi (Fig. 28) nearly or quite twice the rostrum, slender, tapering, and sim- 
ple. The two basal joints are very short, as in Colossendeis ; 3d, about seven 
times as long as the two basal joints taken together; 4th, about one fifth the 3d; 
5th, seven eighths the 3d ; 6th, short, quadrate ; 7th, one third the 3d; 8th, 
one half the 3d ; 9th, a little less than the 8th ; 10th, straight and slender, less 
than the 9th. Outer joint sparsely hairy ; hairs simple, short, more numer- 
ous along the lower side. The palpi usually have a sigmoid flexure bend- 
ing sharply backwards at the fourth joint and forwards again at the sixth. 
The accessory legs (Fig. 30) are rather larger in the male, but do not other- 
wise differ markedly in the two sexes, There are three very short basal joints ; 
Ath, more than twice as long as the three basal joints taken together, curved, 
with a slight scarcely conical elevation on its anterior side which is very con- 
stant and characteristic ; 5th, slightly clavate, shorter than 4th ; 6th, 7th, 8th, 
9th, 10th, diminish pretty regularly in length; 6th, strongly clavate, with a 
brush of slender hairs at its lower distal angle which are much longer and more 
numerousin the male. Spines of 7th to 10th joints (Fig. 31) arranged, asin Co- 
lossendeis, in several irregular rows. They are lanceolate, acute, coarsely serrate, 
