CALIFORNIA CUMACEA — ZIMMER 431 



Occurrence.— 0& Corona Del Mar, Calif., 7 fathoms, May 17, 

 1933 (no. 32), a female with brood pouch, together with a specimen 

 of Colurostylis (?) occidentalis. Between Balboa and Corona Del 

 Mar, 17-33 fathoms. May 17, 1933 (nos. 26, 30), two females with 

 brood pouches. Holotype, U.S.N.M. no. 71439. 



Remarks. — Lacking a male, I cannot say with certainty whether 

 the species belongs to Hemilamprops or Lam'props. As the subor- 

 bital notch is but slightly developed, I place it with Hemilmiiprops 

 with a question mark. {Lamprops carinata Hart tends to bridge 

 the gap between the two genera. The male has no pleopods — a 

 Lamprops character — but has well-developed and not shortened an- 

 tennal flagella — a Hemilamprops character.) 



In possessing a single oblique fold on the carapace, the new species 

 agrees with Hemilamprops uniplicata G. O. Sars and with Lamprops 

 (?) heringi Caiman. Both, however, lack the reverse forwardly 

 directed branch of this fold. The armature of the telson, as well as 

 the relative length of the three distal joints of the second pereiopods, 

 is also different. In Z. (?) heringi.^ moreover, there is a distinct 

 subrostral notch with an acute-angled subrostral tooth. 



Genus DIASTYLIS Say 



DIASTYLIS CALIFORNICA, new species 

 FiGUEE 37 



Female with hrood pouch. — The thoracic portion of the body is 

 somewhat longer than the abdominal but shorter than the abdomen 

 and telson together. The abdominal portion is quite sharply set 

 off from the broader and higher thoracic portion. 



On the ocular lobe three indistinct lenses may be distinguished. 

 There is a distinct subrostral notch. The subrostral angle is but 

 narrowly rounded. 



The margin of the subrostral notch carries several anteriorly 

 directed plumose setae. The margin of the suborbital angle is 

 only indistinctly denticulate, although the margin of the carapace 

 a little farther back (behind carina no. 2 described below) has a 

 short row of long slender teeth. 



The carapace is pronouncedly and characteristically sculptured, 

 showing strong elevated ridges or keels, enclosing between them 

 noticeably excavate or depressed areas. At two places on either 

 side of the carapace, three such keels run together. The angles 

 (in the stereometric sense) thus formed by these keels rise well 

 above the general surface of the carapace, almost forming blunt 

 teeth. One of the angles (no. 1) lies just before the end of the 

 frontal lobe but at some distance from it; the second (angle no. 2) 

 is a little distance behind the end of the frontal lobe. From angle 



55452—36 2 



