1904.] NATURAL SCIENCES OF PHILADELPHIA. 23 



division by Tryon and others, of which decapitatus Reeve and bracteatus 

 Hinds are typical, belongs to the Rhachiglossa, as Mr. Yanatta and 

 the writer will elsewhere show. Mr. Kesteven has shown that Triton 

 speciosum Angas is a Trophon. 



Aquillus labiosus (Wood). 



Murex labiosus Wood, Index Testae. Suppl., p. 15, PI. 5,*fig. 18a (1828). 



Triton labiosus of authors. 

 Triton exaratum Reeve, Lischke, Jap. Meeres-Conch., II, p. 35; III, p. 30, 



PI. 2, figs. 15-17. Not of Reeve! 

 Tritonium excavatum Reeve, Pilsbry, Catal. Mar. Moll. Jap., p. 47. 



Hirado, Hizen (Hirase, No. 911). 



This species has been erroneously described and figured as T. 

 exaratum Reeve, an Australian form, which I have determined by com- 

 parison of numerous Australian specimens to be distinct from the 

 Japanese species. Aquillus exaratus (Rve.) has a much more highly 

 conic nucleus with more whorls; the postnepionic whorls have a 

 flatter shoulder, and coarser secondary spiral striation. It should be 

 deleted from the Japanese list. 



There is no trustworthy or authentic West Indian record for Aquillus 

 labiosus. The specimens so marked which I have seen are from shell 

 dealers, who, like many others, have not always been careful about 

 localities. 



NATICID^l. 

 Polinices sagamiensis n. sp. PL IV, figs. 37, 37a. 



Shell obliquely hemispherical, solid and heavy, smooth; chestnut- 

 brown, with the spire, a band below the suture, and an area at the base, 

 the umbilicus and aperture white. The spire is very small, short and 

 low, though slightly conic. Whorls 5, the last one .very rapidly enlarg- 

 ing, globose, narrowly rounded at the base, where it curves into the 

 umbilicus. The suture is superficial. The very oblique aperture is 

 half round and pure white, the columellar side straight. The posterior 

 angle is filled with a very heavy convex callous. At the middle of the 

 columellar margin a large, rounded, flat-topped lobe projects into the 

 umbilicus, terminating a very large spiral cord which nearly fills the 

 axial cavity, leaving a crescentic umbilical furrow, overhung on the 

 convex arc by a heavy rounded rib which forms the outer margin of the 

 umbilicus. 



Length 32.5, diam. 35 mm. 



Hayama, a place on Sagami Bay, about 4 miles from Kamakura. 

 Type No. 85,956, A. N. S. P., collected by Miss A. C. Hartshorne. 



This is the species I listed as a form of P. poivisianus var. draparnaudii 



