CAVOLINIIDAE 279 



All these specimens were in very bad condition and showed no traces of shells. Three 

 were captured north-east of the Falkland Islands, and the two to which a query is at- 

 tached were taken west of Cape Town. Vayssiere (1915, p. 83) regards Cleodora chaptali, 

 Souleyet, C. andreae, Boas, and C. falcata, Pfeffer, as synonymous with C. curvata, 

 Souleyet. The latter species was named from a single individual 2 mm. in length having 

 a perfectly smooth shell. The species recorded here is the same as that referred by 

 Meisenheimer (igo5rt'). Massy (1909) and Bonnevie (1913) to C. falcata, which is cha- 

 racterized by a dark purple body and a head which has the shape of a triangular lobe. 

 The fins have a continuous margin. The tentacles have ivory-coloured end-plates: the 

 right is the larger and is placed more anteriorly. The pallial cavity is placed ventrally, 

 but extends also to the right side. The tongue-shaped gill is also on the right side, and 

 the heart and kidney are placed ventrally. The shell is 2-5 times as long as broad. The 

 ventral side has four shallow longitudinal furrows which are entirely absent from the 

 dorsal side. On neither side is there a median projection of the lip of the shell. Lateral 

 keels are present, and the posterior end is bent dorsally and terminates in the round 

 embryonic shell usual in the genus. The type specimen measured 12-5 mm. in 

 length. 



Cleodora andreae, Boas, has a shell in which the length is 1-5 times the breadth. The 

 dorsal side has five longitudinal ribs and the ventral side two. Very weak transverse 

 furrows are present. Length 20 mm. A single individual was taken in the South 

 Atlantic at 33° 30' S, 11° o'W. 



C. chaptali, Souleyet, is described from a single example 19 mm. in length taken at 

 the Cape. The shell, according to Boas (1886, p. 81), is not so flat and is much broader 

 than that of C andreae. It has five longitudinal ribs on the dorsal side and the transverse 

 furrows are more strongly marked than in C. andreae. 



Of C. curvata, Souleyet, Boas {op. cit.) states that " It has the same general form as 

 C. chaptali but is quite smooth, the mouth is narrower and the posterior end is bent 

 upwards strongly. It is not the young of one of the foregoing species ; if that were so its 

 shell would be similar to the most posterior 2 mm. length portion of the shell of the 

 species concerned, which is never the case. Souleyet took a single example in the 

 Atlantic Ocean". 



Distribution. 44° N, 32° W, one. "Atlantic Ocean", one (Pfefter, 1880). Davis 

 Strait to 37° N (Meisenheimer, 1905). West of Ireland, 50'^ to 54° N, 400-1200 fathoms, 

 four living (Massy, 1909). Empty shells, Azores, Canaries and South American coast 

 (Challenger Expedition). North Atlantic only "in the deeper layers of the ocean" 

 (Bonnevie, 1913). 



Subgenus Hyalocylix, Fol, 1875 

 Cleodora (Hyalocylix) striata (Rang), 1828. 



Hyalaea striata, d'Orb., 1826-33. 

 Creseis fasciata, Delle Chiaje, 1841. 



