PLATE XVII. (Crustacea, Plate XLIII.) 

 Parapagurus houvieri, n. sp. 



(J . The figure below gives an enlarged dorsal view of the cephalothorax, showing 

 in position the eyes, first antenna?, acicles of the second, the chelipeds, 

 second perseopods, and on the left the third perreopod. Protruding on the 

 right are the extraneous bladder-like organisms. 



a.s., mxp. o, prp. 1, prp. 2. These letters are attached to a lateral view of the 

 cephalothorax, showing in position an eye, a first antenna, a maxiiliped, 

 the larger right-hand cheliped (first persopod), and the second perc-eopod. 

 The extraneous organisms are seen at the bases of the third maxiiliped 

 and the second perasopod. In these composite figures the exact relative 

 sizes are not preserved, owing to the difficulty of focussing under the 

 microscope. 



T. The telson and the uropods in connection with the sixth pleon segment. 



oc. One of the eyes, much magnified. 



a.s., a.i. The first antenna and the peduncle of the second, magnified to the same 



scale as the separated eye, but not so highly as the following details, 

 prp. 4, prp. 5. The three terminal joints of the fourth, and two terminal of the 



fifth perffiopod. 

 pip. 1., pip. 1, pip. 2. The convex and concave sides of the first pair of sexually 



modified male pleopods, in position between the coxre of the fifth per^o- 



pods ; and one of the second pair, 

 urp., urp. The uropods magnified to the same scale as prps. 4, 5, pips. 1, 2, and 



the higher enlargement of the telson. 



