MOLLUSC A. 19 



culatis; sutura simplici ; sinu laterali posticali ; labro paululum incrassato, intus laevi; apertura 

 fusca, ovali ; canali brevi. 



Inhab. Bay of Guayaquil ; Gulf of Magdalena, California. In from five to 

 twenty-two fathoms. 



Fluctuating between dark chesnut and black, polished, the ribs scarcely 

 more than narrow tubercles, and the suture very slightly impressed. Inner 

 lip produced. 



59. Clavatula aspera, Hinds, 1. c. p. 40, (Plate VI. fig. 7, 8.) Testa subclavata acuminata, 

 fusca vel nigricante ; anfractibus septenis, rotundatis, costulatis, lineis elevatis decussatis ; sutura 

 linea. elevata instructa. ; labro paululum incrassato, intus laevi ; apertura fusca, ovali ; canali brevi. 



Inhab. Guayaquil. In five fathoms, mud. 



60. Clavatula quisqualis, Hinds, 1. c. p. 44, (Plate VI. fig. 5.) Testa fusiformi, acuminata, 

 nitidissima; anfractibus octonis, superne laevigatis, interne costulatis; costulis brevibus, obliquis, 

 acutis ; lineis albis sinuosis longitudinaliter instructis ; apertura ovata ; sinu laterali rotundo ; labro 

 tenui, acuto, intus laevi ; columella marginata ; canali brevi, effuso, recurvo. 



Inhab. Gulf of Papagayo, Central America. From eight to fourteen 

 fathoms, mud. 



61. Clavatula plumbea, Hinds, 1. c. p. 41, (Plate VI. fig. 9.) Testa fusiformi, attenuata, 

 lasvigata, pallida, fusco fasciata; anfractibus septenis, subrotundatis, costulatis; costulis rotundatis, 

 numerosis, suturam simplicem incurrentibus ; anfractu ultimo fasciis duabus cincto; labro intus laevi; 

 apertura ovali. 



Inhab. Bay of Magdalena, California. From five fathoms. 



62. Clavatula occata, Hinds, 1. c. p. 41, (Plate VI. fig. 10.) Testa fusiformi, attenuata, 

 gracili, cornea, angulate costata ; anfractibus septenis, transversim exaratis ; sutura simplici ; aper- 

 tura angusta lineari ; canali mediocri. 



Inhab. Magnetic Island, west coast of Veragua. 



Slender and attenuated, angular from the ribs being continuous, and 

 transversely ploughed. The aperture is contracted, linear, and a little oblique. 



63. Clavatula lella, Hinds, 1. c. p. 41, (Plate VI. fig. 13.) Testa fusiformi, attenuata, 

 gracili, laevigata, pallide fusca ; anfractibus octonis, rotundatis, costulatis, lineis albidis elevatis 

 decussatis, superne fusco fasciatis, ultimo attenuato ; costulis gracilibus, granulis parvis sparsis 

 instructis, suturam simplicem incurrentibus ; labro intus laevi ; apertura ovali, in canali brevi 

 attenuata. 



Inhab. West coast of Veragua ; from thirty fathoms, mud. Gulf of 

 Papagayo, Central America ; from eight to fourteen fathoms, mud. 



A graceful species, ornamented with transverse brown bands, and pale lines. 



