MUSEUM OF COMPARATIVE ZOOLOGY. 381 



is about midway between that species and the more robust varieties of S. aglets 

 Watson. It belongs in the cold area. 



This species has been imperfectly figured by Pelseneer in the Challenger 

 Eeport on the Anatomy of Deep Sea Mollusks. Specimens have been com- 

 pared for me with Watson's types by Mr. E. A. Smith at the British Museum, 

 who identifies my specimens with Watson's species. The male of this species 

 has a verge behind the right tentacle 2 mm. long, simple and tubular. The 

 right anterior epipodial lappet is specially modified into a conduit for the semi- 

 nal matter, and is rolled into a large long tube into the proximal end of which 

 the penis discharges. It is probable that this conduit serves to conduct the 

 semen to the eggs as they are deposited, rather than for copulation. There are 

 no epipodial remnants between the tentacles. These organs will be more fully 

 described in my Report on the Albatross Expedition. 



Solariella Ottoi Philippi. 



Trockus Ottoi Philippi, Moll. Siciliae, II. p. 227, pi. xxviii. fig. 9, 1884. Jeffreys, 



P. Z. S., 1883, p. 98. 

 Margarita regalis Verrill & Smith (1880), Trans. Conn. Acad., V. p. 530, pi. lvii. 



fig. 37, 1882 ; VI. p. 254, pi. xxix. fig. 14. 



Habitat. Station 264, off Grenada, in 416 fins., ooze, bottom temperature 

 42°. F. U. S. Fish Commission, at various stations off the northeast coast of 

 the United States, in 115-500 fms. Pliocene of Italy, Philippi, Seguenza, etc. 



The comparison with an authentic specimen of Philippi's fossil leaves no 

 doubt whatever that the species described by Prof. Verrill is identical with it 

 as claimed by Dr. Jeffreys. The T. Vaillanti Fischer I have never seen, and 

 the T. cegleis of Watson, which Dr. Jeffreys also unites with Ottoi, I regard as 

 entirely distinct. 



Solariella lissocona Dall. 



Plate XXI. Figs. 8, 8 a. 

 Margarita lissocona Dall, Bull. M. C. Z., IX. p. 41, 1881. 



Habitat. Station 47, N. lat. 28° 42', W. Ion. 88° 40', in the north central 

 part of the Gulf of Mexico, in 331 fms., bottom temperature 47°.0 F. 



Only one specimen has turned up, so far, of this very well marked species, 

 which belongs in the group of S. cegleis, ivfundibulum, etc. 



Solariella lacunella Dall. 



Plate XXI. Figs. 1, 1 a. 



Margarita maculata Dall, Bull. M. C. Z., IX. p. 43, 1881. Not of Searles Wood, 1842. 

 Margarita lacunella Dall, op. cit., p. 102. 



Habitat. Station 2, in 805 fms.; Station 132, off Santa Cruz, in 115 fms., 

 bottom temperature 65°.0 F. U. S. Fish Commission Stations 2592, 2602, 



