12 DR. W. T. CALMAN ON NEW OK RAEE 



Remarks. — As already stated, this very beautiful species, which, from the abundance 

 of the material, I have been able to describe with some detail, resembles C. exsculpta 

 Sars and C. persculpta Caiman, but it is at once distinguished from them by the 

 different sculpture of the carapace, especially by the absence of transverse crests on 

 the dorsal surface. In the structure of the appendages it shows great similarity to 

 C. australis Sars, while at the same time it seems to present no differences of generic 

 value from the type of the genus, C. longicaudata Sars. 



Occurrence. — "Lyttleton Harbour, New Zealand, 1-5 fathoms, H. Suter Coll." 

 Many specimens. Copenhagen Museum. Co-types in British Museum. 



Ctclaspis si.milis, sp. n. (Plate III. figs. 1-3.) 



Descrijition of adult Female. — Total length 5-75 mm. 



Resembling C. elegans in shape and general proportion of the body. The lateral 

 depressed area on the carapace is less distinctly excavated, and the only prominent 

 tubercle is that representing the anterior upper tubercle of the species named. The 

 lower horizontal ridge is produced forwards to the edge of the carapace, but posteriorly 

 it is continued with an even curve into the posterior vertical ridge, and does not 

 extend to the posterior edge of the carapace. The posterior vertical ridge at its upper 

 end forks into two branches diverging at an obtuse angle. The anterior one does not 

 reach the ridge which runs backwards from the anterior upper tubercle, so that the 

 upper margin of the depressed area is not completely enclosed. The sides of the 

 carapace posteriorly are more or less rugose. 



The first leg-bearing somite is exposed only at the side. The dorsal crest of the 

 second is produced backwards into a large rounded lobe. The remaining somites are 

 similar to those of C. elegans, but the dorso-lateral crests are stronger and are 

 continued as far as the penultimate somite. 



The thoracic appendages, so far as they can be seen in the undissected specimen, 

 present no conspicuous differences from those of C. elegans. 



The peduncle of the uropods is shorter than the last somite and is finely serrated 

 internally. The rami are shorter than the peduncle. The endopod is not curved 

 at the tip as in C. elegans, and is less strongly serrated internally. The exopod has an 

 apical spine, and some plumose setae on its inner edge. 



An immature male specimen 5"25 mm. in length differs little in general characters 

 from the female described above. The first leg-bearing somite is hidden, and the 

 second is not produced above into a cristiform lobe. 



Bemarks. — This species resembles C. elegans, in company with which it was found. 

 It is distinguished, however, by the different sculpture of the carapace. 



Occurrence. — " Lyttleton Harbour, New Zealand, 1-5 fathoms, H. Suter Coll." 

 Copenhagen Museum. Co-type (young) in British Museum. 



