BUTTON : WEST AMERICAN CYPR.KID.'E. 2i;7 



europceii^ dredged in Southern California and not yet described. 



22. — T. atomaria Dall/ 3-2 mm. 



23. — -T. panamensis Dall.^ 4-2 mm. Panama. 



All these species of Trivia seem to be well marked and free from 

 doubt, except T. fiisca and T. rubesceiis^ as to both of which much 

 uncertainty has existed, both as to identity and habitat. (See nos. 12 

 and 18 antea, and also the papers of Dr. Carpenter.^) The recent 

 receipt of various Trivice direct from the Galapagos Islands, the type 

 locality of both species, has failed to clear up these doubts — at least 

 to my mind. 



Doubtful and Erroneous Species. 



Cypraea cervus Linn. — Dr. Stearns says this is "undoubtedly an 

 East Coast (Gulf of Mexico) form, and may be regarded as a variety 

 of C, exanthema'''' \ and that he has " never met with the cervjis form 

 from the West (Pacific) side." ^ My less extensive information and 

 study leads me to the same opinion. This form is well figured in the 

 Sowerby monograph (nos. 89 and 90), and is also figured by Roberts'*; 

 and as C. cervina by Kiener (pi. 2, fig. i ; pi. 3, fig. i). The localities 

 given for this form are, however, all erroneous except that of Kiener 

 ("Antilles.") I cannot place the form figured by Reeve (fig. 6b) which 

 has the wide anterior beaks of C. cervus together with a colouring 

 more similar to C. exantiieina. A small form from Florida is more 

 globose and is almost identical in form with C. pantherina as figured 

 by Kiener (pi. 21, sp. i). 



I know of no specimens of this group {cervus-exanthema) coming 

 from the Pacific Islands (Rve.), Senegal (Kiener), East Indies (Mel- 

 vill), or Polynesian Islands (Carpenter, Mazatlan Moll.). Specimens 

 reported from these localities were doubtless taken there by whalers 

 or trading vessels after touching at American ports. 



Trivia acutidentata Gask.'"' Ecuador. Described from a single 

 worn specimen, which was broken before the description was published 

 (1835). No other specimens known. 



T. candidula Gask. — This species mentioned as from "Mexico" 

 (Melvill) is not known to me as from the western coast of that coun- 

 try or of America elsewhere. (See no. 18 anted). 



T. COStis-punctata Gask. — (Sowerby, no. 148; Melvill, "? Cali- 

 fornia"). This shell, which appears to be closely allied to T. radians, 

 is unknown to me. 



1 Nautilus, vol. i6, p 43, Aug., igo2. [Note added Sept. 20, 1902. — F.L.B.l. 



2 Rep. Brit. Assoc. Adv. Sci., 1856, pp. 159-368 ; " Catal. Mazatlan Shells," p. 378. 



3 Proc. U..^. Nat. Mtis., vol. i6, p. 395, 1893. 



4 Tryoii, "Man. Conch.," vol. 7, pi. 2, nos. 11 and 12. 



5 Proc. Zool. Soc, 1835, p. 201. R 



