Thomson. — On Neiv Zealand Crustacea Anomura. 171 



indebted to the authorities of the x\ustraHan Museum, Sydney, 

 •for Austrahan specimens, which have enabled me to figure the 

 species. 



PAGUEIDEA. 



Fam. I. PAGUEID.E, Dana. 



Hermit crabs, in which the branchiae are laminate in form, 

 the central stem bearing two rows of flattened leaflets. All 

 inhabit shallow seas. 



1. First and second abdominal segments without genital 



appendages. 



a. Fourth pair of legs chelate. 



Front with rostral projection ; ocular pe- 

 duncles slender ; chelipedes subequal 1. Clihanarius. 



b. Fourth pair of legs subchelate. 



Front with rostral projection. 



Chelipedes unequal, the right usually 



the largest . . . . . . 2. Eupagurus. 



Chelipedes subequal . . . . 3. Aniculus. 



Chelipedes unequal, the left the largest 4. Stratiotes. 



2. First and second abdominal segments with genital 



appendages (the first segment only in the female) 5. Paguristes. 



Fam. II. PARAPAGUEIDiE, Smith. 



Hermit crabs, in which the branchiae consist of a central 

 stem bearing two rows of rounded filaments, gradually de- 

 creasing in size towards the apex. All inhabit very deep 

 sea. 



Chelipedes stout, very unequal, the right larger ; 

 males without a protruded vas deferen.s, and 

 having genital appendages on the first two ab- 

 dominal segments . . 



Chelipedes slender, the right sliglitly larger ; males 

 with a protruded vas defereiis, and without the 

 genital appendages on the first two abdominal 

 segments .. 



1. Parapagurus. 



2. Pagurodes. 



Porcellanopagurus. 



Genus incertce sedis. 

 Carapace produced iuto a long rostrum ; abdomen 

 bearing one pair of appendages on its anterior 

 portion, furnished with plates at its posterior 

 extremity. Living among Algse, and not seeking 

 the protection of an empty shell 



Genus 1. Clibanaeius, Dana. 



Front acute in the middle. Ocular peduncles slender, the 

 basal scales small and close together. Antennal acicle short, 

 the flagellum naked. Chelipedes similar, subequal ; hand 

 small, fingers opening horizontally, excavated internally and 

 horny at the tips. Ambulatory legs smooth, often with 

 longitudinal colour-markings, penultimate pair chelate. 



