590 THE VOYAGE OF H.M.S. CHALLENGER. 



Claus, 1879, receives the species "1. L. themistoides, Claus, 1S79;" "2. L. Lindhergi, 

 n. sp." 

 Fam. 12. " Trtph.enidjs, A. Boeck, 1870." 



"Gen. 1. Trijphsena, A. Boeck, 1870," receives the species "1. T. Malmi, A. Boeck, 1870;" 

 " 2. T. NordeTiskiiJldi, n. sp." It will be noticed that Boeck's family Tryphanidae and genus 

 Trijpliaiia are here altered in spelling evidently on philological grounds, an improvement 

 which in my opinion is both unlawful and inconvenient, as multiplying synonyms and 

 making the authority for the names uncertain. Sars' identification of Boeck's Tryphana 

 with Lycxa, Dana, is tacitly rejected. Gen. 2. " Thamyris, Spence Bate, 18G0," receives 

 six species, "1. Th. rapax, Claus, 1879"; "2. Th. globiceps, Claus, 1879;" "3. Th. 

 crusculwn, Spence Bate, I860;" "4. Th. antipodes, Spence Bate, I860;" "5. Th. 

 inxquipes, Dana, 1852;" "6. Th. elegans, d. sp." But the position of Dana's Dairilia 

 insequipes in this genus seems to warrant the transfer of all the six species to Dairilia, 

 Dana, 1852, with the species insequipes for tlie type. In Dana's work, under Daira, 

 M.-Edw., for which Dana furiher on substituted Dairilia, the first species given is 

 Daira ? dehilis, the second is Daira 1 dejrressa, the third Daira insequipes. As apparently 

 none of these belong to Milne-Edwards' genus, it is reasonable to take the species 

 unmarked by a note of interrogation as the type of Dana's own genus. 

 " Gen. 3. Thamneits, n. g.," is thus defined : — 



" Head small, depressed. Body broad, depressed. First two pairs of pereiopoda similar to 

 those in Thamyris. Femora of fifth and sixtji pair small. Seventh pair perfectly 

 developed, with claw-formed dactylus. Telson distinctly articulating with last ural 

 segment." This has the species "1. Th. rostratus, n. sp.;" "2. Th. dehilis, Dana, 1852," 

 the reference being to Daira ? dehilis, Dana. Of Dana's Daira 1 depressa, Bovallius does 

 not seem to take account. Gen. 4. Lycsa, Dana, 1852, has the following seven species, 

 "1. L. ochracea, Dana, 1852;" "2. L. pidex, Marion, 1875;" "3. L. similis, Claus, 

 1879;" "4. L. rohusta, Claus, 1879;/' "5. L. nasuta, Claus, 1879;" "6. L. sei-rata, 

 Claus, 1879;" "7. L. Stehhingi, n. sp." It is not explained why the Lycxa pmlez of 

 Marion and the Lycuea rohusta of Claus are upheld as distinct species. Gen. 4 [5]. 

 Paralycsea, Claus, 1879, has the species "1. P. gracilis, Claus, 1879;" "2. P. Newtoniana, 

 n. sp.," definitions being given of both. Gen. 5 [6]. Pseudol ycssa, Claus, 1879, has one 

 species, " P. pachypoda, Claus, 1879." Gen. 7. Simorhynchus, Claus, 1871, has the species, 



"L S. antennariiis, Claus, 1871 ;" "2. S. Lilljehorgi, n. sp." 

 Fam. 13. Oxycephalid.«, Spence Bate, 1862. 

 Gen. 1. Glossoeephalus, n. g., is thus defined: — "Head anteriorly produced into a thick, 



rounded, tongue-shaped rostrum. Tibia, carpus, and metacarpus of fifth pair of pereiopoda 



very dilated, not tumid. UropoJa short and broad." This receives the species, " 1. G. 



Milne-Ed wardsi, n. sp.;" " 2. G. spiniger, n. sp." 

 Gen. 2. Oxycephalus, M.-Edw., 1830, receives the species, "1. 0. piscator, H. ]Milne-Ed wards, 



1830;" "2. O. Clausi, n. sp.;" "3. 0. tuherculatus, Spence Bate, 1862;" "4. 0. 

 pedinatus, n. sp.;" "5. 0. latirostris, Claus, 1879;" "6. 0. jxjrcellus, Claus, 1879;" 



"7. 0. pronoides, n. sp.;" "8. 0. Steenstrupi, n. sp.;" "9. O. longiceps, Claus, 1879;" 



"10. 0. typhoides, Claus, 1879;" "11. 0. scleroticus, H. Streets, 1878." 

 Gen. 3. Lepiocotis, Streets, 1877, has the species, "1. L. LindstriJmi, u. sp.;" "2. L. tenui- 



rosiris, Claus, 1871." 

 Gen. 4. Tullhergdla, n. g., is thus defined : — " Head anteriorly produced into a short, sharp, 



wedge-shaped rostrum. Body thick and broad. First two pairs of pereiopoda strongly 



chelate. Femora of fifth and sixth pairs broadly dilated. Seventh pair rudimentary. 



Urus and uropoda short; interior rami not coalesced with the peduncles." This has one 



species, " T. cuspidata, n. sp." 



