developed additional branch. The basal joint of the maxilla with a conical process on the 
boundary between the inner side and the posterior side. The maxillipeds tolerably robust; 
the basal joint smooth and naked; (whether the second and the third joints are separated 
could not be made out with certainty); the last joint has a few short setz inside its point. 
The sub-median skeleton has narrow lists inside the maxilla and a well-developed list between 
the head and the trunk behind the base of the maxillipeds; no hairs on the skeleton between 
the appendages. The lateral margins of the head naked. The trunk naked; the trunk-legs 
distinct. The genital area (fig.4a) much narrower than the head, much broader than long; 
the solid chitinised part forms a somewhat sinuous semi-circle, which posteriorly has a narrow 
interruption at the median line, and anteriorly a very broad opening; the hindmost sub- 
median part is nearly straight, the anterior corners bent inward; the ring itself is rather 
narrow except outside the posterior extremity of each genital aperture, where it expands on 
the inward side. The genital apertures are large, strongly curved and situated close together ; 
the well-developed caudal stylets are found in very close proximity on the soft skin which 
divides the ring on its posterior side. The genital area is naked, except a number of very 
fine hairs on the ring near the caudal stylets and on a smaller spot behind them. 
MALE. The only specimen (fig. 1f—1g) is ‘20mm. in length; its breadth is a little 
more than two thirds of the length. This shows that it is tolerably small compared with 
the chief bulk of males, but extremely large compared with the female (fig. 1b: fig. 1a). The 
animal is flatly rounded anteriorly and with very obtuse angles in the middle of its lateral 
margins; its head is only a trifle larger than its trunk. The front is feebly produced, its 
margin is naked. Antennule, antennze, mouth, maxillule and maxilla much as in the female. 
Maxillipeds of medium length, the basal joint with smooth inner margin, and a moderately 
large part of the outer surface provided with hairs, these, as usual, arranged in stripes and 
spots; the terminal joint as in the female. The sub-median skeleton with all three pairs of 
processes developed; the first pair, behind the maxillze, are broadly rounded, depressed, 
plate-like; the second pair long, slender, almost cylindrical and strongly diverging; the third 
pair are situated at some distance from each other between the second pair and are not 
half the length of these. The lateral margin of the head is furnished with hairs (and as in 
much the greater number of species, this hair-covering begins in front of the base of the 
antennulz), continues in an oblique direction upward and backward across the side and 
the back, forming laterally a rather narrow band of moderately long hairs, being reduced 
on the back almost to a line of very long hairs. Behind this line the back has a long, 
naked transverse area, whereas the remainder of the back, the sides, the posterior extremity 
and the ventral surface — except on its foremost part — are closely covered with hairs of 
medium length. The dorsal and upper lateral parts of the head have hollow spaces beneath the 
skin. The first pair of trunk-legs are short, with a broad basal part and two short, sub- 
cylindrical branches situated far apart from each other; the outer branch ending in two 
sete, one of which is about the length of the second joint of the maxillipeds, whereas the 
