1881.] THE SURVEY OF H.M.S. ' AI.RRT,' 65 



even more distinct species of this genus ; bnt the series in the British- 

 Museum collection does not suffice to decide this question, by far the 

 greater number of specimens having been obtained at or near the 

 southern extremity of the American continent. Bell (Trans. Zool. 

 Soc. ii. p. 40, 18-19) refers examples of Eurypochus from Brazil to 

 E. latreillei ; but I have seen no specimens from this locality. 



In the great majority of specimens in the British-Museum col- 

 lection, the spines of the rostrum are robust, of moderate length, and 

 curve slightly dovenward ; the spines on the branchial regions are 

 small or reduced to tubercles ; and the penultimate joints of the 

 ambulatory legs are considerably dilated and longer than the ante- 

 penultimate joints. In younger individuals the joints of the legs and 

 rostral spines are slenderer. One adult male from Sandy Point, in 

 the series presented to the British Museum by Dr. Cunningham, 

 differs from all others in the collection in the greater development of 

 the anterior legs, in which the palm is turgid and the dactylus armed 

 with a very strong tubercle on its inner margin. In two examples 

 from Chili (one an adult male), which I at first thought might be 

 regarded as a distinct species, the branchial spines are somewhat more 

 developed, and the antepenultimate joints about equal the penulti- 

 mate joints in length, these latter being also less dilated than in 

 adult examples from the Straits of Magellan and Falkland Islands. 

 A better series of examples from Chili, however, is needed to prove 

 whether or not these characters are permanent. I have seen no ex- 

 amples in which the antepenultimate joints of the legs greatly 

 exceed the penultimate joints in length. 



Dr. Cunningham in his Report (/. c. p. 491) retains no fewer 

 than four distinct species — E. latreillei, E. audouinii, E. septentrlo- 

 nalis, and E. brevipes. 



The series collected by Dr. Coppinger includes : — several adult 

 males and females from Puerto Bueno, obtained at a depth of 4 

 fathoms, on a muddy bottom ; a female and several young from Sandy 

 Point, at 7-10 fathoms; and one young individual obtained in 

 Trinidad Channel, at a depth of 30 fathoms. 



InACHOIDES MICRORHYNCHUS. 



Inachoides microrhynchus, Eydoux & Souleyet, Voy. Bonite, 

 Zool. Cr. p. 219 (1841); M.-Edw. & Lucas in d'Orbigny's Voy. 

 Amer. merid. vi. Cr. p. 4, pi. iv. fig. 2 (1843) ; Gay, Hist, de Chile, 

 Zool. iii. Cr. p. 12G (1849). 



Xiphus margaritifere, Eyd. & Soul. Voy. Bonite, Zool. Cr. Atlas, 

 phi. fig. 1 (1841). 



Two males and a female were brought by Dr. Coppinger from 

 Coquimbo. 



Both genus and species have been hitherto unrepresented in the 

 collection of the British Museum. The adult male agrees very well 

 with Milne-Edwards and Lucas's figure ; but the depressions separating 

 the regions of the carapace are not very strongly marked, as stated 

 in the description of these authors. 



Proc. Zool. Soc— 1881, No. V. 5 



