114 U.S. NATIONAL MUSEUM BULLETIN 25 8 



species (1585 per sq. m.) ; coralline algae, second most abundant species 

 (1480 per sq. m); loose rocks, abundant; Egregia sp., scarce; Antho- 

 pleura elegantissima bed, rare, corona del mar: loose rocks, rare. 

 la jolla: Phyllospadix-corsiiline grid, scarce (44 per sq. m.); coralline 

 algae, rare; underrock grid, rare (4 per sq. m.). 



Distribution. — Japan Sea; California from Monterey Bay to Bahia 

 de San Quintin, Baja California, 0-100 m. 



Eusirid 



Material. — corona del mar: underrock substrate, scarce. 



Gammaridae 



Ceradocus spinicauda (Holmes) 



Maera spinicauda Holmes, 1908, pp. 539-541, fig. 45. 



Ceradocus spinicauda: J. L. Barnard, 1954a, pp. 18-19; 1962b, pp. 86-88, figs. 

 10, 11. 



Material. — goleta: Macrocystis holdfast, 3 m., abundant. 

 Distribution. — Intertidal at Cape Arago, Oregon to subintertidal 

 on the coastal shelf of southern California. 



Dulzura, new genus 



Diagnosis. — Accessory flagellum 2-articulate; lower lip lacking 

 inner lobes; mandibular palp article 3 slender, slightly longer than 

 article 2, very slightly falciform; inner plates of maxillae 1 and 2 

 densely setose medially; gnathopod 1 subchelate, gnathopod 2 of 

 either sex small, poorly subchelate; coxae short, overlapping, quad- 

 rate, coxa 4 not excavate posteriorly; pleonites 1-3 neither toothed 

 nor spined; uropod 3 of melitid form, outer ramus greatly elongated, 

 Particulate, article 2 short, inner ramus very short, scale-like; telson 

 deeply cleft, short. Generic name feminine, contrived, its root having 

 basis in ^Icitas, sweetness, referring to the possibility that the blind, 

 albinid genus has origins in freshwater aquifers or has the appearance 

 of organisms living in sweetwaters of caves. 



Type species. — Dulzura sal, new species. 



Relationship. — As a melita-like organism, with characteristically 

 elongated uropod 3, this genus differs from Melita Leach by the 

 biarticidate outer ramus of uropod 3, the second article being longer 

 than its neighboring spines and by the absence of inner lobes on the 

 lower lip. It differs from Melitoides Gurjanova (1934, 1951) in the 

 extension of uropod 3 well beyond the ends of uropods 1 and 2, the 

 lack of inner lobes on the lower lip and the stouter, slightly falciform 

 article 3 of the mandibular palp. The poorly developed gnathopod 2 

 is reminiscent of the condition in Metaceradocus Chevreux and 

 Megaluropus Hoek, quite unlike Melita and Melitoides. Netamelita 



