1899.] A. Alcock — New and Rare Species of Crustacea, 115 



under a blanket formed by the perfectly soft coenosarc of a colony of 

 Actiniarian polyps of a genus near Zoanthus or, more probably, Mamil- 



lifera. 



Chlaenopagtirus Andersoni, n. sp. (Plate T.) 



The cervical groove is deep-cut, and the portion of the carapace 

 that is included within it is strongly calcified. The triangular cardiac 

 region is also fairly well calcified, especially in its anterior part. But all 

 the rest of the carapace, except here and there along the outer edge of 

 the cervical groove, is quite soft and membranous. The hepatic region 

 is marked off from the branchial region by a transverse furrow, and 

 a longitudinal furrow separates the hepatic from the pterygostomian 

 region. 



The front, which is carinated dorsally and deflexed at tip, projects 

 well between the eye-stalks. 



The eyes are large and reniform and are borne on stout stalks, 

 which are about quarter the length of the carapace measured in the 

 middle line. 



The first two joints of the antennulary peduncle are together 

 slightly longer than the eyestalk, the first joint being flattened and 

 somewhat dilated dorsally : the third joint and the flagellum combined 

 are not half again as long as the first two joints. 



The antennal peduncle is about the same length as that of the 

 antennules : the acicle is about as long as the eye-stalk : the flagellum 

 is about twice the length of the carapace. 



The chelipeds are massive, quite equal, and about as long as the 

 entire body with the abdomen in the natural position : not much more 

 than a third of their length is formed by the arm. They are more or 

 less covered with long, stiff, golden yellow bristles, which are specially 

 thick-set on the under surface of the arm and the outer surface of the 

 wrist and hand : these bristles do not hide the rather coarse squami- 

 form turbercles from which they spring. There are some coarsish 

 spines along the inner border of the ischium, both the lower borders 

 of the arm, and on a good part of the outer surface of the wrist and 

 hand. 



The legs are stout and compressed, and their borders — and in the 

 case of the last three joints of the first two pairs, a considerable 

 part of the surface also — are more or less covered with the same stiff 

 yellow bristles that grow on the chelipeds. The first pair of legs are of 

 equal length with the chelipeds. The second pair are a little longer, 

 and a third of their length is formed by the long sabre-shaped dactylus. 

 The third pairdo not reach to the far end of the carpus of the second 



