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University of California Publications in Zoology. [Vol.6 



larger specimens) between adjoining tentacles, each with 2-6 

 statoliths. Velum moderately well developed. Gonads linear, on 

 the outer three-fourths of the radial canals, reaching margin, sin- 

 uous in contraction of bell. 



Diameter of largest specimen 23 mm. 



Distribution. — Taken, during May, June and July, in the 

 vicinity of San Diego, at the surface and in vertical hauls to 

 160 fathoms. Ace Nos. 0-11. 752, 959, 1382, 1398, 1402. 



Pig. 9.- FMalopsis diegensis. Portion of margin. Much enlarged. 



There is a tendency among the larger specimens to slight 

 irregularities in the position of radial canals and gonads. 



A single, small medusa that may prove to be an immature 

 specimen of this species was obtained in a vertical haul from 

 100 fathoms, July 11, 1905, off San Die.uo ; Ace. No. 995. The 

 bell is hemispherical, as high as broad, without gastric peduncle. 

 with well-developed manubrium of the Phialopsis type. Eight 

 tentacles. 4 larger perradial and 4 smaller interradial, each 

 flanked by 2 cirri. Between adjoining tentacles two marginal 

 papillae, probably beginnings of tentacles. Between and adjoin- 

 ing these papillae a statocyst (8 in all) with 2 statoliths. Go- 

 nads immature, developing on the radial canals about three- 

 fourths the length of the latter from the margin. 



This individual resembles Euchilota more closely than it re- 

 sembles Phialopsis. As no adults of the former genus have been 

 obtained, it is placed provisionally under Phialopsis. 



