GAMMARIDEAN AMPHIPODA 71 



original printing ; the eye of the shallow-water f onn, eliminated in the 

 origmal engraving, is correctly printed now. Included are several 

 figures of a weakly chitinized specimen from shallow water, which 

 are contrasted with the deep-sea blind form in the presence of a molar- 

 like, embedded spine at the defining corner of the palm of gnathopod 1 

 and the minute accessory spines on the outer lobe of maxilla 1. A 

 slight hump on the lateral margin of maxilla 1, which may represent 

 the vestigial palp, has been discovered in both deep-water and shallow- 

 water forms. The shapes of gnathopod 2 differ somewhat between 

 the two forms. The anoculate form has vestigial purple pigment in 

 place of ommatidial eyes. 



I^Iaterial.— Station 7234 (1). 



DiSTRiBUTio]sr. — Monterey Bay, Calif., to Bahia San Cristobal, Baja 

 California, oculate form in depths of 10-439 m, anoculate form in 

 791 m. 



Schisturella Norman, new synonymy 



Schisturella Norman, 1900, p. 208. 

 Pscudoneshnus Chevreux, 1926, p. 3. 



Diagnosis. — Upper lip and epistomal complex conspicuous, large, 

 upper lip strongly lobate and anteriorly produced in type-species 

 but poorly lobed and unproduced in other species; head rather small 

 (subjective relationship, see conunents, p. 39) ; mouthparts not es- 

 pecially concealed by coxae and quadrately grouped from lateral as- 

 pect; mandibular molar strong, with grinding ridges poorly developed 

 or nearly absent, palp attached level with molar ; maxilla 1 with several 

 stout spines on outer lobe; other mouthparts typical of nonaberrant 

 lysianassids; coxa 1 reduced in size slightly, narrowed, tapering, par- 

 tially hidden by coxa 2 ; gnathopod 1 subchelate, not enlarged ; inner 

 ramus of uropod 2 strongly constricted toward distal end ; outer ramus 

 of uropod 3 biarticulate ; telson longer than broad, cleft varying from 

 33 to 75 percent of total length of telson. 



Type-species. — Ti^yj^hosa j)ulchra Hansen (see Shoemaker, 1930), 



Generic composition. — Pseudoneshnus dbyssi Chevreux (1926). 

 P. abyssi tasmanensis J. L. Barnard (1961), Lakota adverslcola K. H. 

 Baniard (1925) (as Chlroneslmus in Schellenberg, 1926b, and J. L. 

 Barnard, 1962a), Schisturella grahenls, new species, S. totorami, new 

 species, Amhasiojysis rohustus J. L. Barnard (1961), Lakota rotunda- 

 tus K. II. Barnard (1925) (as ChlroneslmMS in J. L. Barnard, 1962a), 

 Schisturella cocula and S. zopa J. L. Barnard (1966a). 



Remarks. — J. L. Barnard (1966a) pointed out that species he had 

 assigned to Schisturella have a subcorneal process on the posterodistal 

 margin of article 3 of antenna 2 ; this is now shown to be characteristic 



