PART 1 GARTH : PACIFIC OXYRHYNCHA 47 



acute, without teeth, and without any intramarginal hiatus when closed ; 

 merus and carpus with a few distant granules on the upper margins. 

 The ambulatory legs very imperfect and their dimensions [unascertain- 

 able], but evidently slender and considerably elongated, with the 

 penultimate [segments] larger than the preceding and very little dilated. 



An immature female, dredged at the same locality and depth, has the 

 rostrum scarcely at all reflexed and somewhat shorter, with the spines 

 less divaricate at the apex; the chelipeds and ambulatory legs clothed 

 with a denser pubescence ; the latter much less elongated. This specimen, 

 although distinguished by the narrower carapace and more elongated 

 rostrum, much more resembles the typical Eurypodius latreillei than does 

 the male. (Miers, 1886, modified) 



Material examined: None. The male and female in the British 

 Museum (Natural History) were reexamined at the request of the 

 writer by Dr. I. Gordon, from whose notes and sketches the following 

 information was derived: 



Male: The small spine on the orbital border lies between the rim 

 of the eye socket and the postocular spine, as in Eurypodius latreillei. 

 The propodus of the walking legs is compressed, although less so than in 

 the companion species. The male first pleopod is as figured, although 

 spinulation could not be determined due to the condition of the specimen. 

 The female is immature, without perforate genital pores. The chelipeds 

 exceed the rostrum by about three- fifths of the chela. The rostrum is 

 slightly over one-fourth the total carapace length, its tip soft and slightly 

 bent. (See also measurements below.) 



Measurements: Male holotype: length of carapace to base of rostrum 

 about 19 mm, length of rostrum about 11 mm, width of carapace a 

 little over 15 mm, length of cheliped nearly 32 mm. (Miers) Female: 

 length including rostrum 16.3 mm plus (probably 16.5), width 9.6 mm, 

 rostrum 4.4 mm, detached walking leg (number uncertain) : merus 

 plus next small segment 12.6 mm, carpus 6.6 mm, propodus 8.7 mm, 

 width 1.7 mm, dactylus 4.8 mm. 



Color in life: Not known. 



Habitat: Blue mud. 



Depth: 175 fathoms. In view of the much lesser depth of 77.5 

 fathoms which represents the lower limit of range of Eurypodius 

 latreillei, the deeper habitat may be said to be a specific character of E. 

 longirostris. A similar distinction obtains in boreal Pacific waters in 

 connection with Oregonia gracilis and O. bifurca, the latter being the 

 deep water species. 



