224 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL.. 18 



It is also related to P^rtdsuius IGurjanova 1936: 249) but differs 



in the shape pf the he#3 and the/ shape and location of the teeth on 



J el ' / / / \ / ' ■ * ' 



peraeppod j. // / / > / < y\ 



It is related to P. cornutus (Schellenberg 1931 ) Jbtit Idiffers mainly 

 in, the lack of a process on the third urosome segment'; / ! 

 ■ Material examined. — 833 specimens at 86 stations) \> 



Distribution. — ^Southern California coastal and ,'insular shelves, 5 

 to24fms. r y : ,.r : .j; ^ 



Paraphoxus heterocuspijdatus, new species f 



_.. (Plates 19, 20) ^:- - 



Diagnosis of female.- — Head with broad rostrum but constricted in 

 front of eyes; eyes small.. Body rather broad af/d'' dprsally flattened? 



Epistome not produced, rounded in front. \ ■ -^—rr--'- ^ 



Maxillipedal palp article 4 with small apical spine and subterminal 

 seta. ,, ,, ,'","« 



Gnathopods 1-2: article 5 . longer than 6, the latter moderately i to 

 very broad and expanding distally, palm scarcely oblicjue. Ratio of articles 

 5 to 6: Gnathopod 1 = 36:29, Gnathopod 2 = 32:38. : 



Peraeopod 3 : articles 4-5 moderately expanded, narrower than article 

 2, article 6 as long as 5. Ratio of widths of articles' 2, 4, 5, 6 « 

 26:20:19:8. r! ^«-- ! 



Peraeopod 4: article 4 as broad as in peraeopod 3, article 2 much 

 broader, article 6 much longer than 5. Ratio of widths of articles 2, 4, 

 5, 6 = 36:20:15:6. < 



Peraeopod 5 : article 2 generally rather broad, in typical specimens 

 the ratio of width to length is about 43:42 or 1:1. Posterior edge of 

 article 2 with 4-5 teeth; generally the teeth are variable in size and not 

 uniformly larger ventrally; one or more of the teeth may be much 

 smaller than its dorsal neighbor,' or thb dorsal pair of teeth may be 

 much smaller than the ventral pair. Sweep point near distal edge of 

 article 3, lower edge broad, scarcely dipping anteriorly and slightly con- 

 vex; rest of appendage moderately stout, articled as long as 5. 



PLATE 19 



Paraphoxus heterocuspidatus, n. sp., male, young, 2.75 mm, Sta. 2113-52. . 

 Figs. A,B, antennae 1, 2; C, epistome; D, upper lip; E, mandible; F, 

 lower lip; G,H, maxillae 1, 2; I, maxillipedal palp article 4; J, 

 gnathopod! 1; K,L, ! gnathopods 2, both sides; M,N, head; O.P.Q.R, 

 ... peraeopods 1, 3, 4, 5 (including right posterior edge) ; S, coxa 4; 



XJ'iV,W,'ufopods 1, 2, 3; X, telson; Y, pleon segments 2-3; Z, chewing 

 plate of gastric mill. , ;.:.. >':\ :v. . 



Female, Sta. 2153-52. Figs. T,U, gnathopods 1, 2. _ ,..,, v ... ; : , if f f 



