611 



Table 1. Diagnostic characters of three species of Hyperia. 



Diagnostic Feature H. leptura 



H. bowmani 



Relative head length. Length longer than 

 female pereonites I+II 



Relative length of 

 maxilliped lobes 



Apical armament of 



the medial lobe of the 



maxilliped 



Form of article 5 of 



pereopoda I and II 



Distal projection of 



article 5 of pereopod II 



Medial lobe does 

 not reach the middle 

 of the lateral lobe 

 1 strong spine 



Almost linear 



25-33% the length 

 of article 6 



Length subequal to 



length of pereonites 



I+II+III 



Medial lobe longer 



than the middle of 



the lateral lobe 



2 spines 



Distinctly broad- 

 ened distally 

 About 75% the 

 length of article 6 



H. curticephala 



Length shorter than 

 pereonites I+II 



Medial lobe longer 

 than the middle of 

 the lateral lobe 

 2 spines 



Distinctly broad- 

 ened distally 

 About 40% the 

 length of article 6 



Armature of posterior Slightly dentate 

 edge of article 6 of with spines 

 pereopod IV 



Armature of article 6 Unarmored 

 of pereopoda VII 



With a row of long Smooth or with very 

 submarginal bristles small, indistinct 



teeth 

 With a row of long, Unarmored 

 robust submarginal 

 bristles 



it is absent in L. ducrayi. The telson of L. bengalensis is generally more 

 pointed than in L. ducrayi, especially in females. Lestrigonus ducrayi 

 also seems to be a smaller species. 



It has been found along the western shores of Queensland, Australia. 



3. Phronima bowmani Shih, 1991 (Figure 3) 



Length of females 7.0-9.5 mm, males 6.6-8.0 mm. 



This species is morphologically close to P. colletti and P. bucephala. 

 It is somewhat indistinct from P. bucephala. A few specimens have 

 greater produced teeth on the posterior region on article 2 of pereo- 

 pod VII, with a few even narrower grooves, between the carpal projec- 

 tion and the first tooth in males, and weak variations in the arrangement 

 of carpal teeth on pereopod V in females. The validity of this species is 

 questionable. 



Collected in the eastern tropical Pacific (83° 35' N 97° 32' W). 



4. Phronima dunbari Shih, 1991 (Figure 4) 



Length of sexually mature female, 8.6-11.0 mm, males 6.8-7.4 mm. 



This species is very close to P. stebbingi and is distinguished from 



it by weakly expressed minor details in the structure of the teeth on the 



