ACESTE OVATA. 137 



were taken in the middle and southern Atlantic at depths ranging from 620 

 to 2600 fms. 



Aceste ovata. 



A. Agassiz and Clark, 1907. Bull. M. C. Z., 60, p. 258. 



In view of Koehler's (1914. Ech. Indian Mus. Spat.) extended descrip- 

 tions and excellent figures of this species (under the name annandalei), it is 

 quite superfluous to redescribe or figure it here. Dr. Koehler had eleven speci- 

 mens while I have had seventeen so that a fair amount of material has been 

 examined. Koehler's smallest specimen was 19 mm. long while his largest was 

 35 mm. My largest is of the same size as his but nearly all my specimens are 

 under 20 mm. and my smallest is only 12 mm. long. Koehler is very sure that 

 his specimens should not be referred to ovata or purpurea but he has made no 

 allowance for the much larger size of his specimens and for individual diversity. 

 The differences which he points out seem trivial and I do not believe they have 

 any taxonomic value. Even the differences which he points out between annan- 

 dalei and bellidifera, will largely disappear when sufficient material is examined. 

 The pedicellariae in the specimens from Hawaii and Japan agree very well with 

 Koehler's description and figures but it is obvious that they are not very dis- 

 tinctive. 



Station 3836. Off Lae-o Ka Laau Light, Molokai, Hawaiian Islands. 

 Bott. temp. 48°. 238-255 fms. Br. gy. m., s. 



Station 3839. Off Lae-o Ka Laau Light, Molokai, Hawaiian Islands. 

 Bott. temp. 46.3°. 259-266 fms. Lt. br. m., s. 



Station 3898. Off Mokuhooniki Islet, Pailolo Channel, Hawaiian Islands. 

 Bott. temp. 44.1°. 258-284 fms. Br. glob, m., fne. s. 



Station 4041. Off Kawaihae Light, Island of Hawaii. Bott. temp. 41.6°. 

 253-382 fms. Gy. m., for. 



Station 4666. West of Callao, Peru. Bott. temp. 34.9°. 2600 fms. 

 Fne. gy. rad. oz. 



Station 4672. Southwest of Palominos Light House, Peru. Bott. temp. 

 35.2°. 2845 fms. Fne. dk. br. inf. m. 



Station 4911. Southwest of Koshika Islands, Japan. Bott. temp. 41.9°. 

 391 fms. Gy. glob. oz. 



Station 4913. Southwest of Koshika Islands, Japan. Bott. temp. 41.9°. 

 391 fms. Gy. glob. oz. 



Bathymetrical range 238-2600 fms. Extremes of temperature 48°-34.9°. 



Seventeen specimens (some fragmentary). 



