Fauna Associated with Crinoids of Tropical Coral Reef, etc. 87 
which the last is the smallest) and the absence of spinule on the gastric 
region. They differ from multilineata in having a shorter rostrum and 
longer spines and in the far less marked sculpturing on the carapace. 
Galathea minuta sp. n. (Plate 1, Fig. 6.) 
A very small galatheid, with short and broad rostrum, 3 sharp spines on 
each side; gastric region without spines, carapace with few hairs, traversed by 
about 12 shallow transverse grooves; chelze short; merus of third maxilliped 
with 2 strong spines internally, one externally. 
From Comanthus annulatum, obtained in about 4 fathoms of water off 
Mabuiag Island, Torres Straits, Australia. 
Measurements: Length of cephalothorax to tip of rostrum 4.5mm. Length 
of chela 6.2 mm., of propodite 2.7 mm. Breadth of cephalothorax 3 mm. 
Length of carpopodite 1.0 mm., of meropodite 2.5 em. 
The carapace is of fairly uniform breadth, narrowing slightly and gradually 
anteriorly. Its surface is smooth, traversed by only about 12 shallow grooves, 
in which lie scanty rows of short hairs. There are no spines on the gastric 
region, but prominent spines (8 in number) exist at the end of the transverse 
grooves. 
The rostrum is rather short and broad. The central spine is very strong 
and elongated and on each side of it are 3 prominent spines with their bases 
close together and advanced, also strong and elongated. The surface is smooth. 
The basal joint of the first antenna carries 3 anteriorly directed spines; the 
dorsal one is long, the two ventral smaller and more slender. 
The merus of the third maxilliped carries 2 large spines internally and one, 
rather shorter, externally followed by small spinule. The teeth on the internal 
border of the ischiopodite are comparatively few and strong. 
Abdomen with two transverse lines to each segment. 
Chele short, about half as long again as the cephalothorax, beset with long, 
coarse, scattered hairs and strong spines on the propodite, carpopodite, and 
meropodite, especially the carpopodite. Dactylopodite little more than a third 
of the propodite in length. 
Merus of ambulatory legs beset on upper angle with about 10 spines, very 
small proximally, prominent distally. Dactylopodite with strong end claw 
and one prominent spine succeeded by minute processes. 
Colouration: Alternate longitudinal stripes of white and dark blue, as 
shown in plate, of about equal breadth. On a light-coloured individual of 
Comanthus annulatum. 
AMPHIPODA. 
A tiny amphipod which occurred very often on the darker crinoids is 
apparently to be referred to the family Amphilochide, a new genus of 
which must be established for its reception. 
CYCLOTELSON gen. n. 
Rostrum curved, acuminate, lateral angles of head rounded. Side plate 1 
not much smaller than 2, rounded, obscured by those succeeding it; 2 to 4 
large and deep, 2 and 3 rounded, 4 largest, quadrangular shape (also 5) as in 
Amphilochus. Antenna 1 very short and stout, flagellum particularly so. 
No accessory flagellum, upper lip bilobed, lower lip with small inner lobes. 
Mandible with very narrow denticulate cutting edge, molar process absent, 
third joint of palp very long. Maxilla 1, inner plate absent, outer plate with 
8 or 9 spines, the proximal much the largest and forming dentate process 
