REPORT ON THE ANOMURA. 87 



peduncle. The ambulatory limbs, with the exception of a few spinules on the anterior 

 border of the carpal joints, are comparatively smooth. An adult male measures 31 mm. 

 in length. 



Parapagurus dimorphus was dredged by the " Gazelle " off the Cape of Good Hope, 

 at a depth of 117 fathoms, living in shells of Bucchmm porcatum, Gm., which were 

 completely covered by colonies of Epizoanihus cancrisocius, von Martens. 



Parapagurus ahyssoriim, A. Milne-Edwards, MS. (PI. IX. fig. 2). 



Characters. — The anterior portion of the carapace is strongly calcified, somewhat 

 square in outline, and moderately convex both from side to side and from before back- 

 wards. The surface is smooth and polished, though certain slight inequalities are 

 noticeable towards the lateral margins, and the frontal border is raised. The median 

 frontal projection is obtusely rounded, scarcely reaching the bases of the ocular peduncles, 

 the lateral projections are even less strongly marked, but with pointed apices. The 

 carapace behind the cervical groove is submembranous, with the exception of the narrow 

 cardiac area which is calcified ; the branchial regions are strongly convex. 



The ocular peduncles are narrow, especially towards the centre, but dilated somewhat 

 at the base ; the cornese are of small size though deeply pigmented ; the ophthalmic 

 scales are narrow and spinulous, and each terminates in a pointed projection. The 

 antenna! peduncles are massive and exceed the eye-stalks by the whole length of the 

 ultimate joint ; the acicle is long and slender, extending slightly beyond the distal end 

 of the terminal joint, it has a slight sigmoid curve and the inner margin bears a row of 

 small spinules ; the external prolongation of the second joint is short and its apex 

 rounded ; the terminal peduncular joint is broad and somewhat flattened ; the flagellum 

 is more than twice the total length of the body. The first joint of the antennular 

 peduncle has its distal end situated opposite the end of the eye-stalk, the terminal joint 

 is half as long again as the second joint, and almost equal in length to the whole antennal 

 peduncle. 



The chelipedes are moderately slender and of considerable length, with the joints 

 granular and pubescent. The right chelipede has the merus somewhat shorter than the 

 carpus, with its outer surface granular, and a dense pubescence underneath, the inner 

 surface is comparatively smooth, and a raised tubercular line exists immediately behind 

 the anterior margin, at the inner and distal margin on the under surface a few tubercular 

 spines of small size are met with ; the carpus is about equal in length to the hand (not 

 including the fingers), and the upper surface is uniformly granulated, the lower surface is 

 convex from side to side, and is both pubescent and granular, while the lateral borders are 

 not sharply defined ; the propodus is but little dilated and its general characters are those 

 of the carpus. The immobile finger is placed at an obtuse angle to the lower border and 



