MARINE CRUSTACEANS. 269 



necessary to guard against the entrance of foreign bodies or enemies. Whether the eyestalks 

 can be raised, upon occasion, so that the small eyes are exposed, it is impossible to say, but 

 in the spirit specimen they are certainly so firmly fixed that they cannot be moved without 

 breaking the carapace. The specimen is not well enough preserved to allow of statements being 

 made as to the retina, but a small mass of pigment can be seen through the transparent 

 underside of the eyestalk, at some distance from the cornea. 



The systematic position of the genus is doubtful, especially in view of the fact that 

 the male is not known. If it belong to the Xanthidae, it is perhaps more closely related 

 to the Menippinae than to any other subfamily, but it may quite possibly be a Catometope 

 allied to the Rhizopinae, and especially to the species which Miers referred doubtfully to 

 Typhlocarcinus under the name T. integrifrons \^Aiin. Mag. N. H. (.5), VIII. p. 260 (1881)]. 



1. Caecopilumnus hirsutus, n. sp. (Fig. 59). 



Diagnosis: "A Caecopilumnus with the carapace moderately convex from side to side, 

 strongly so fore and aft, granular and pubescent all over, the front strongly bent downwards, 

 its sides sloping inwards to a groove in the middle, fringed with long hairs, which are also 

 found all over the orbital region and eyestalks and along the sides of the carapace ; the 

 orbit very small, without orbital tooth or spine or notches in the rim ; the anterolateral edge 

 passing with an even sweep into the posterolateral behind, and in front fading away at a 

 point behind and above the outer angle of the orbit, which thus comes to lie to a great 

 extent on the underside of the body; the granules of the carapace enlarged along the 

 anterolateral edge into small spines, arranged in four irregular sets ; the hinder edge hollowed ; 

 the regions rather faintly marked ; the eyestalks large relative to the orbits, which they 

 entirely fill, fitting close against the thin, non-prominent rims, and thus complete the outline 

 of the carapace, simulating the carapace in their granulation and hairs ; cornea small and 

 hidden on the underside of the eyestalk ; chelipeds equal, granular, pubescent and hairy, these 

 features extending to the fingers, the fingers compressed and grooved, with interlocking teeth 

 on their apposed edges, and sharp, crossing tips ; and walking legs of moderate length, very 

 stout, especially the second and third, which have very long propodites, covered with long 

 hairs but without spines." 



Length : 8 mm. Breadth : 9 mm. Colour in spirit : white. 



Genus Maldivia. 



A white Gorgonacean, dredged in eight fathoms of water, in North Male, bore a minute 

 but very interesting symbiotic crab, whose peculiarities justify the setting up of a new genus 

 for it. The following are the characters of this genus : (1) Carapace hexagonal, swollen, a 

 little longer than broad, hairless, roughened with granulations which pass into spines at the 

 sides, and with indications of the regions. (2) Front broad, triangular, widely grooved, bent 

 strongly downwards. (3) Anterolateral edge toothed, about equal to posterolateral. Hind edge 

 wavy. (4) Orbits large, very slanting, not fully closed. (5) Abdomen of male seven-jointed. 

 (6) Endostome ridges present, but not very strong. (7) Eyes large. (8) Antennae with slender 

 basal joints which do not touch the fi-ont, and long flagella. (9) Merus of third inaxilliped 

 about as long as broad, without a notch in the fore edge, which is straight. (10) Chelipeds 

 stout, Piluvinus-Yike, fingers not hollowed at the tip. (11) Walking legs moderately stout. 



The genus resembles Pilumnus in the shape of the hands and the endostomial ridges. 



