Boone, Mollusca, Cruises of "Ara" and "Alva" 337 



OEGOPSIDA 



Suborder: Enopleuthinae 



Tribe: ENOMORPHAE Chun 



Family: ENOPLEUTHIDAE 



Genus: ABRALIOPSIS Joubin 



Abraliopsis morisii (Verany) 



f 



Type : This was taken from the stomach of an ordinary dol- 

 phin, captured at 39° Lat. N. 29° Long. The depository is not cited, 

 but is probably the natural history museum at Turin. The species 

 was named in honour of Dr. Morisi, author of the "Flore de la 

 Sardigne." 



Distribution : This lovely little deep-sea Oegopsid has been 

 reported from the type locality (Verany) ; Mascarenes Islands 

 (Pfeffer) ; Villefranche, Mediterranean (Joubin) ; Gulf of Bengal 

 (Goodrich) ; Atlantic Ocean region (Hoyle) ; "Valdivia" station 

 54, Guinea Stream, stations 223-228, 231, Bay of Chagos Archi- 

 pelago, and stations 256, 265, Indian North Equatorial Stream, 

 in depths varying from 628 to 1,134 meters (Chun) ; Flores Strait, 

 140 fathoms (Boone) . 



Material examined: One young adult specimen and two 

 post-embryonic stage specimens, dredged in 140 fathoms (500 

 meters of wire out), in Flores Strait, near Larantuka Village, 

 Flores Island, Dutch East Indies, October 22, 1931. 



Remarks : This exquisite deep-sea species has been exhaus- 

 tively analyzed by Dr. Chun (1910), whose excellent illustrations 

 portray the delicate translucent beauty of this interesting Oegop- 

 sid. The single adult specimen taken by the "Alva" is nearly the 

 size of the specimen from the Guinea Stream, "Valdivia" station 

 54, shown by Dr. Chun in plate 6, figure 2, and is about one-half 

 as large as the adult male with hectocotylized arm from the same 

 "Valdivia" station, shown in figure 1, of the same plate. 



The Flores Strait specimen has the following measurements 

 (in millimeters) : 



Dorsal mantle length 8.5 



Length of head 2.5 



Width of head between the eyes 4 



