( H5 ) 



The right vas deferens protrudes as a long, more or less rigid tube, which 

 is recurved upwards over the right Hank and then on to or across the dorsum 

 of the abdomen from right to left : it does not end in a filament. 



The abdominal appendages are placed on the left side and are usually 

 four in number (somites 2-5) in both sexes, the first three in the female being 

 biramous. The uropods are more developed on the left side than on the ri^ht 

 and the telson is emarginate or bifid. 



The gills are 11 in number on either side, arranged as in Parapagurjis, 

 Sympngurus, Etipagur2is, Spiropagurns, and Anapagurus. 



Catapagurns differs from Spiropagunis and Anapagurus in the fact that 

 it is the right vas deferens, not the left, which is produced into a tube ; it 

 further differs from Spii opagnrus in the greater inequality of the chelipeds. 

 It differs from Cestopagurus in the form, and direction of the protruded 

 vas deferens, which in the last-named genus curves from right to left 

 beneath, not above, the abdomen, and may end in a filament as in 

 Nematopag tints. In Catapagnroides the left vas deferens protrudes, as well 

 as the right, as it does also in Nematopagiirus. 



The species of Catapagurns are for the most part sublittoral, and, except 

 that they have not been found in the eastern part of the Atlantic, have much 

 the sam.e geographical range as those of Spiropngurus. They occur in the 

 western part of the North Atlantic, from the West Indies to Massachusetts, 

 at depths of about 50 to about 250 fathoms, in Oriental seas from the 

 Malnive-^ to Japan, and again off the Panama coast of the Pacific. 



Hei^erson's Catapagurns mtmcatus from Ceylon is a Nematopagurus, as the 

 female 1:, provided with a pair of appendages on the first abdominal somite. 



I. Catapagurus ensifer, Henderson. Plate XIII. fia r> 



Catapagurns etisifer, J. R. Henderson, Trans. Linn. Soc, Zool., (2) V. 1893, p. 424 

 pi. xsxviii, flg. 16-19. 



Carapace glabrous ; rostrum obtuse, barely as prominent as the well- 

 defined antennal angles of the carapace. 



Eyestalks broad, much shorter than the front border of the carapace 

 reaching to about the middle of the 2nd joint of the antennular peduncle 

 and to the end of the penultimate joint of the antennal peduncle. Eyes 

 large, somewhat pale. Ophthalmic scales spiniform, distant. 



Antennal peduncle much shorter than that of the antennules. Acicle 

 short, hardly reaching to the end of the penultimate joint of the peduncle ; 

 flagellum more than twice the length of the body, nude. 



