i888. Crossophonia, Sars, Arch. Naturv., vol. 12, p. 182. 

 1896- Crossophon/s, Brady aiul Norman, Trans. R. Duljlin Soc-, 

 scr. 2, vol. 5, p. 643. 



Shell porcellanous^ broadly rounded at hinder extremity; 

 antennal notch ovcrhimg by suljacute rostral processes. First 

 antennai uith second joint Ioniser than third and fourth com- 

 bined; fifth joint with sensory appentlag-e in both sexes- Second 

 antennae with three-jointed secondary ap|)enda,^e, its third joint 

 in the male falcate, clasping, in the female continuous with the 

 second joint and ending- in a long seta. Mandibles five-jointed, 

 with strongly bifid hairy masticatory process on first joint, and 

 small bisetous exopod on the second. First and second maxillae 

 about as in Cypridiua- Alaxillipeds six-lobed. the ])enultimate 

 division forming a large sub-triangular lamina continuous on the 

 inner margin with tlie small apical lobe. Apex of vermiform 

 appendage variable, the armoured spines on these limbs numer- 

 ous- Caudal laminae having stout ungues interspaced with 

 slender ones, the graduation in the length of the ungues being 

 also discontinuous, although continuous for those of similar 

 stoutness, except that the hindermost is shorter than the penulti- 

 mate. 



In hisNeapolitan monograph Dr. (r. W.MiiUerdismissesthis 

 genus as insufficiently described (p. 174, 1894). But this was 

 before the revision of it by Brady and Norman had appeared. 

 Those authors had the oi)i)ortunity of examining a female speci- 

 men 7 mm. long, taken by the Porcupine Expedition 

 of 1869, in the Atlantic, west of Donegal Bay, 

 Ireland, lat. :=,^'- 11 X., long, n" 31' W., in which the 

 genus was originally founded was a malp, 84 mm. in 

 length, taken by tlie Challenger from a reputed dep'th of iioo 

 fathoms, bottom tcmjicrature 35°. 6 Fahr., a little to the East of 

 New Zealand, lat. 40' 28' S./long. ^y7° 43' E- That the two 

 specimens belong to the same genus cannot reasonably be 

 •doubted, and, notwithstanding the enormous interval between the 

 places of capture, Brady and Norman assign th»-m to the same 

 species, CrossopJionts iiiipcrafflr. That they are very nearly allied 

 may be readily allowed, but their specific identity is not so clear. 

 The Irish specimen appears to have the antennal notch more 

 widely open but considerably less deep than it is in the .shejl 

 from the Pacific Tn the figure of tlie latter it penetrates back 

 decidedly beyond tlie middle of the valves toward the dorsal 

 margin, while in the former it scarcely reaches the middle. Di's- 

 tally on its front margin the mandible has a row of 12 setae in the 

 Pacific specimen, but only 6 in that from the Atlantic. The fittle 

 apical lobe of the maxillipcds is well marked in the Pacific speci- 

 men, hut much lessdistinctintheother. Th*^vermif-rm appen- 

 dage of the male is described as almost exactly like that of 

 Cypridhia. whereas in the female " at the extremity one lip is in 



