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



antennas is not noticed, this is clearly Ganimanis locusfa, Linn., and as Montagu professedly 

 mentions it only to clear it from confusion with other species, it is singular that he should 

 place in the synonymy OnUctis gammarelliis, Pallas, which is an Orchedia. He describes 

 the eyes as " lunated, fixed," with an explanatory note, " Not pedunculated, or moveable, 

 but fixed under the shell of the thorax ; a circumstance common, I believe, to all this family." 

 The epithet in "hands sub-cheleferous " he also explains in a note, as "A term adopted for 

 a single fang capable of closing upon the hand, answering the purpose of a fixed claw, in 

 contradistinction to cheleferous, or such as are formed with double claws." 

 On page 93 he gives " Cancer Gammarus Pdlbx. Tab. iv. fig. 2. Cancer Pulex. Gmel. Sijst. 

 •p. 1055. Turt. Linn, iii. p. 760. Brit. Zool. vi.p. 21. No. 33." This, he remarks, "is as 

 incapable of living in salt water as the C. Locusta is in fresh, although we have the authority 

 of Ijinnajus and many of his disciples to the contrary. It is also incapable of leaping, and 

 very soon dies when taken out of water." 

 On page 94 is " Cancer Gammarus Saltator. Tab. iv. fig. 3. Cancer Locusta. Brit. Zool. 

 iv. ^7. 21. No. 34 Ouiscus Locusta. Pallas Spic. Zool. 9. t. 4. f. 7. Misc. Zool. t. 14./. 15." 

 Of this Montagu says, " The C. Saltator is without doubt the animal referred to by Pallas, 

 and this confirms the opinion that Gmelin has confounded it -with, his Cancer Loeicsta, having 

 quoted both the Oniscus Oammardlug and O. Locusta of that author for it. That it is 

 Pennant's C. Locusta there can be little doubt, as he particularly mentions the quality of 

 leaping, a power denied to the other species." Montagu's figure very clearly depicts what 

 is now known as Talitnis loctista, Pallas. As he makes no reference to Klein's Squilla 

 saltatrix, 1743, the specific name saltator was probably not borrowed from that source. 

 On page 96 he gives " Cancer Gammarus littoreus. Tab. iv. fig. 4. Pulex marinus. Bastcr Op. 

 Subs. ii. p. 31. t. 3. /. 7. 8." " The C. littoreus," he says, " is doubtless the species figured 

 by Easter as above referred to, and which Gmelin has erroneously quoted for the Linneau 

 Cancer Pulex." This is pretty clearly the Oniscus Gammarellus of Pallas, which Montagu 

 himself has erroneously quoted for the Linnean Cancer locusta. Its name, therefore, should 

 be, as Boeck gives it, Orcliestia gammarellus, Pallas. 

 On page 97 he gives " Cancer Gammarus grossimanus. Tab. iv. fig. 5." This is a new species. 



It is now called Mxra grossimana (? better, grossimanus). 

 On page 98, " Cancer Gammarus Talpa. Tab. iv. fig. 6.," now called Apjsevdes talpa, belongs to 



the Tanaidas. 

 On page 99, "Cancer Gammarus rubricatus. Tab. v. fig. 1." is a new species, which was 

 referred by Leach to his genus Amphitho'e. It includes, I believe, Ainphitho'e littorina, Sp. 

 Bate, and three or four other synonyms from species founded chiefly on immaterial distinc- 

 tions in colouring. 

 On page 100 is given the new species "Cancer Gammarus falcatus. Tab. v. fig. 2." This 

 Leach considered to belong to the genus Ja.9sa, which he instituted with the species Jas-'<a 

 pulchella and Jassa pielagica, establishing at the same time the genus Podocerus with the 

 species Podocerus variegatus. Milne-Edwards gave Cancer falcatus and Jassa pelagica to 

 Cerapus p)elagicus, to Podocerus variegatus he left its name, and changed Jassa pulchella into 

 Podocerus pulchdlus. Spence Bate gave the four as separate species of Podocerus, to which 

 more recently all four have been assigned as a single species. Boeck united the names 

 pielagicus and pidcliellus as synonyms to Montagu's falcatus, no doubt correctly, but it seems 

 curiously perverse that he should assign Leach's three species of Jassa to Podocerus and 

 Leach's species of Podocerus to Janassa, altered without due reason from Jassa. Janassa 

 may well fall to Podocerus as being too near for generic distinction, but, if not, the species 

 in question would have to be named Jassa falcata, Montagu, and Podocerus variegatus. 

 Leach. It is rather singular that Montagu should finish his accoimt with the words 

 " This curious and rare species inhabits the deep, amongst Sertularia, and Algs, and has 



