30 



Boas distinguished ') three variations, angusta, lata and convexa. The first of these forms 

 has been figured by d'Orbigny -) under the name of "var. B'\ 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 Adantic (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 {angusta: stat. 59, 102, 139, 177^, 185, 203, 211, 276; lata: stat. 52, 

 88, 141, 178, 21 I, 212, 243). 



The variety convexa (southern part of the Indian Ocean and South- Atlantic, according 

 to BoASj exhibits such a slight difference from lafa^ 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 ciispidata (Bosc). 



1802. Hyalaea ciispidata Bosc, Histoire naturelle de.s Coquillcs, vol. II, p. 238 (241?), pi. IX, 



figs- 5—7- 

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

 1830. Cleodora lessonii Rang, MS., in: LESSON, Voyage autour du Monde de la Coquiile, 



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

 1833. Cleodora ciispidata Qoy et Gaimard, Voyage de I'Astrolabe, Zoologie, vol. II, p. 384, 



pi. XXVII, figs. 7—5. 

 1852. ? Cleodora quadrispinosa ^) Rang, Histoire naturelle des MoUusques Pteropodes. pi. V, fig. 6. 

 1888. Clio ciispidata 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"' 

 pyraniidata, but Clio cnspidata. 



Anatomical Remarks. 

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



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



2) Voyage dans I'Amerique meridionale, vol. V, pi. VIl, figs. 25 — 32. 



3) This species, already referred to by Lesson (Voyage de la Coquiile, vol. II, prt. I, p. 248), is probably the same as Clio 

 (iispulata., though this suggestion cannot be made with absolute confidence. According to Lesson, the shell "presente qualre angles et 

 par consequent quatre faces, qui distants a leur base et tres ouverts, finissent en une point aigue ct un pen contournee", while the fins 

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



4) A Manual of the Mollusca, pi. \I\', fig. 33 (2d Ed.). 



