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U.S. NATIONAL MUSEUM BULLETIN 278 



Figure 24. — Caprella unica; a, lateral view of male with intermediate spination; b, lateral 

 view of male holotype of C grahami; c, female gnathopod 2; d, male gnathopod 2; e, 

 female pereopod 7;/, lateral view of female allotype of C, grahami. 



C. unica has been reported on two species of starfishes, Asterias 

 jorhesi (Desor) and Asterias vulgaris Verrill. This association with 

 echinoderms is unusual and has been found for Pariambus typicus 

 (Kr0yer) on Asterias and Solaster (Chevreux and Fage, 1925), 

 Aeginella spinosa on Brisinga (Mayer, 1903), Caprella linearis on 

 Asterias (Ohlin, 1895a, probably C. unica, p. 33), Phtisica marina 

 on Asterias (Meinert, 1880), and I have found C. penantis chnging 

 to the spines of Arbacia and C. scaura on an unidentified urchin. 



