30 ART. 1. — CHARLES ELIOT: 



Plocamopherus tilesil Bergh. 



Bergh, Malac. Unters. Heft si, 1877, pp. 433-439, and id. Beiträge zu einer Monogr. der 

 Polyceraden in Yerh. der k. k. Zool.-Bot. Ges. in Wien, 1880, pp. 45-51. 



Eleven specimens from Misaki and elsewhere, yellowish white 

 in colom* with more or less distinct markings of greenish brown. 

 The largest is about 82 mm. long. The specimens are not well 

 preserved but the external characters seem to have been as 

 described by Bergh. 



The jaws are small triangular plates. The radula is large 

 and strong, The inner teeth are chestnut brown, the outer 

 lighter. The rhachis is wide and marked by transverse lines. 

 The teeth are arranged in about 50 rows containing 34 teeth on 

 either side of the rhachis. The first 24 of these are large bifid 

 hooks : the outer 10 are flat plates. 



Plocamoplierus imperialis Angas.. 



See Angas, Journ. de Conchyl. 1864, p. 59 ; Bergh, Beiträge zu einer Monographie der 

 Polyceraden, iii, pp. 144-149, Verhand. k. k. Zool.-Bot. Gesells. Wien, 1883. 



One specimen whitish in colour and 25 mm. long. Locality 

 not marked. The specimen is not well preserved but coresponds 

 with previous descriptions fairly well, both in anatomy and exter- 

 nal character. The radula is as in Bergh' s plate (Lc, pi. X fig, 2). 

 On either side of the broad rhachis are twenty one rows, each 

 of which contains five or six hamate teeth followed by 12-14 

 plates without a hook. 



JEuplocamus jccponicus ( ? ) Bergh. 



Bergh, Beitrage zu einer Monog. der Polyceraden in Verhand. Zool.-Bot. Gesellsch. Wien, 

 1880, p. 636. See also Bergh on E. croceus var. capensis in Trans. S. Afric. Philos. Soc. 

 Vol. xvii, 1907, p. 71 ; and Mazzarelli, Intorno ali Euplocamus croceus, in Annuario del 

 Mus. Zool. Università di Napoli, 1905, p. 1. 



Two specimens from Moroiso, whitish in colour with traces 

 of yellow, 17 mm. and 21 mm. in length respectively. The oral 

 veil bears 8 bipinnate processes. The dorsal margin is clearly 



