30 



BoAS distinguished ^) three variations, aiigiista, lata and convexa. The first of these forms 

 has been figured by d'Orbigny ") under the name of "var. i?", while lata was indicated by 

 this author as "var. A'\ 



According to Boas, angusta occurs in the North Atlantic (60° — 40° N.B.) and in the 

 east part of the Pacific, while lata is found in the Atlantic (40° N.B. — 30°S.B.), Mediterranean, 

 Indian Ocean, China Sea and in the west part of the Pacific. I cannot, however, attach any 

 importance to this geographical distribution, as in the Siboga-material the two forms angusta 

 and lata occurred together {angtista : stat. 59, 102, 139, 177^, 185, 203, 211, 276; lata: stat. 52, 

 88, 141, 178, 211, 212, 243). 



The variety convexa (southern |)art of the Indian Ocean and South-Atlantic, according 

 to BoAS) exhibits such a slight difference from lata, that to my opinion it must be referred to 

 this form (cf the series of figures, given by Boas, 1. c). The only difference which holds good, 

 is the smaller size of convexa. The Siboga Expedition has not found it. 



7. Clio citspidata (Bosc). 



1802. Hyalaca cnspidata Bosc, Histoire naturelle des Coquilles, vol. II, p. 238 (241 ?), pi. IX, 



figs- 5—7- 

 1820. Hyalaea triciispidata Bowdich, Elements of Conchology, pi. VI, fig. i. 

 1830. Clt'odora lessoiiü Rang, MS., in: LessON, Voyage autour du Monde de la Coquille, 



vol. II, prt. I, p. 247, pi. X, fig. I. 

 1833. Cleodora cnspidata Qoy et Gaimard, Voyage de TAstroIabe, Zoölogie, vol. II, p. 384, 



pi. XXVII, figs. 1—5. 

 1852. ? Cleodora qiiadrispinosa '^) Rang, Histoire naturelle des Mollusques Ptéropodes. pi. V, fig. 6. 

 1888. Clw cnspidata Pelseneer, Chall. Rep., LXV, p. 66. 



Empty shells : 



Stat. 95. 5°43'.5N., ii9°'4o' E. i spec. 



Stat. 118. i°38' N., i24°28'.2E. i spec. 



Stat. 211. 5° 40'. 7 S., I20°45'.5 E. 2 spec. 



This species, found abundantly by Lesson (see the note) on the West coast of Australia, 

 has been recorded by the Siboga Expedition from a few stations only. It was moreover only 

 represented by empty shells. 



The figure given by Woodward ') does not represent, as this author says, '■^Cleodora" 

 pyramidata, but Clio cnspidata. ' 



A n a t o m i c a 1 R e m a r k s. 

 The anatomy of the genus Clio has been studied several times, and after the publications 



i) Spolia atlantica, p. 70 — 73, pi. 6, figs. 96 — 97. 



2) Voyage dans rAméiique meridionale, vol. V, pi. VII, figs. 25 — 32. 



3) This species, already veferred to by Lesson (Voyage de la Coquille, vol. II, pit. i, p. 24S), is piubably the same as Clio 

 cnspidata., though this suggestion cannot be made with absolute confidence. According to Lesson, the shell "présente quatre angles et 

 par conséquent quatre faces, qui distants a leur base et tres ouverts, finissent en une point aigué et un peu contournée", while the fins 

 of the animal are "soudés en avant par un petit lobule arrondi". 



4) A Manual of the Mollusca, pi. XIV, fig. 33 (2<i Ed.). 



