obi THE VOYAGE OF H.M.S. CHALLENGE R. 



In Subfam. 5. Gammarides : — 



Brandtia, uew genus, is tlius defined : — " Cepbalon not produced into a rostrum, but elevated 

 into a crest. Antennae subequal ; the superior without a secondary appendage. Gnatho- 

 poda subequal, subchelate. Four anterior coxa; as deep as their respective segments of 

 the pereion, not narrow or pointed. Three p)Osterior pairs of pereiopoda short, subequal, 

 having the base dilated at the upper posterior extremity, and narrowing with a concave 

 sweep to the lower. Posterior pair of pleopoda biramous. Telson squamiform, divided." 

 The type species, Brandtia latissima, is referred to " Gammarus latissimus, Brandt, Voyage 

 de Middendorff," the figures and descriptions having been "taken from specimens sent by 

 Professor Brandt to the Museum at Paris," but, as already explained, that species was in 

 reality instituted by Gerstfeldt, and is retained by Dybowski in the genus Gammarus. 



" Dexamine Blosserilliana n. s."; " Dexamine Loughrini, n. s.," in the ajspundix held to be a 

 variety of Atijlus swammerdumii ; ''Atglus Huxleyanus n. s.," probably belonging to 

 Boeck's genus Halirages ; Atylus villosus, n. s.; Atylus gihhusus, u. s., called Tritseta 

 gibbosa, in Boeck's arrangement; Atylus aiistrinus, u. s.; Pherusa cirrus, n. s., identified 

 by Boeck with Amphithoe bictispis, Kr^yer, wliich G. 0. Sars places in the genus 

 Param/phitho'e, Bruzelius; " Pherusa Barretti, n. s.; Calliope Ussiani, n. s.," united by Boeck 

 to Amj)liitliopsis latipcs, M. Sars, 1858; Calliope grandoculis, n. s., a variety of CalUopius 

 Ixviuseulus, Kr.; " Eusirus Helvetia;, n. s.," which Boeck assigns to his own Eusirus 

 longipes, 1860. 



The genus *Se&a is thus defined: — "Slender, smooth. Antenna3 long, subequal. Cox;« small, 

 four anterior deeper than the three posterior. Gnathopoda uniform, subequal, chelate." The 

 type species is Seba innominata. For both genus and species the authority is hesitatingly 

 given as "A. Costa, Pochi Crosf. di Messina." Professor A. Milne-Edwards has kindly 

 searched for the paper referred to, but without success. The genus is not mentioned in 

 de Natale's letter to Costa, 1850 (see Appendix). See also Note on Seba, 1758-1760, p. 18. 



G'ossea, new genus, is thus defined : — " Slender, compressed. Superior antennae without a 

 secondary appendage, and having the joints of the peduncle short and subequal. Gnathopoda 

 subchelate ; first pair larger than the second. Posterior pair of pleopoda biramous ; rami longer 

 than the peduncle and extending considerably beyond the telson. Telsou single, squamiform." 



" The animals of this genus are very likely, ujion a superficial examination, to be confounded 

 with those of Microdentopus ; but the differences in the superior antennae, posterior jsair of 

 pleopoda, and telson, are considerable and important." The type species is Gossea micro- 

 dentopa, of which the spelling was afterwards corrected to microdeutopa ; both here and in 

 the "British Sessile-eyed Crustacea" it is figured from a defective speciQien, only ^"^ths of 

 an inch long, and bears a suspicious resemblance to a young CalUopius Ixviusculus. M. 

 Chevreux mentions a specimen in his list, 1883, but this he afterwards identified as 

 CalUopius norvegicus, Rathke, as he himself informed me. 



Stimpsonia, new genus, is thus defined : — "Slender; the inferior pair of antennaj considerably 

 longer than the superior. First pair of gnathopoda larger than the second ; carpus 

 broader and longer than the proj)odos ; second pair imperfectly chelate, having the carpus 

 much longer than the propodos. Posterior pereiopoda long. Posterior jsleopoda biramous. 

 Telson tubular." The type species is Stimpisonia clielifera, n. s. Since the generic name 

 is preoccupied among Vermes, this species may well be placed under Costa's genus 

 Microdeutopus. 



Protomedeia hirsulimanus, n. s., description subsequently completed by A. M. Norman, 1868; 



" Protomedeia Whitei n. s.," = Cheirocraftis sundn-alli, $, Eathke, according to Norman and 



Boeck. " Bathyporeia Rubertsoni, n. s."; both this and Spence Bate's other species, 



• Bathi/jJoreia pelagica, are in my opinion synonyms of Batlujporeia pilosa, Lindstrom. 



G. 0. Sars in his Oversigt, 1882, speaks of having convinced himself that Bathyporeia 



