28 THE VOYAGE OF H.M.S. CHALLENGER. 



Subfamily (iASTROCH^NiN^. 

 Gastrochcena, Spengler. 

 Gastrochcena lamellosa, Desliayes (PI. VIII. figs. 2-2&). 



Gastrochcena lamellosa, Deshayes, Proc. Zool. Soc. Lond., 1854, p. 328. 

 Gasfrochceiia lamellosa, Sowerby, Conch. Icon., vol. xx. fig. 14 (bad !). 



Habitat. — Station 18G, off Cape York, in 8 fatliom.s (Challenger); coral mud; 

 Island of Zebu, Philijipines (Cuming). 



The figure in Sowerby's Monograph is not at all accurate, neither as regards the form- 

 of the gape nor the opposite extremity. The figure now given is taken from the type 

 specimen in the British Museum. 



Gastrochcena duhia (Pennant). 



My a duhia. Pennant, Brit. Zool., voL iv. p. 88, pi. xliv. fig. 19. 



Gastrochcena rnodiolina, Lamarck ; Forbes and Hanle}', Brit. Moll., vol. i. p. 132, pi. ii. figs. 5-8, 



and PI. F. fig. 5 (animal). 

 Gastrochcena duhia, Deshayes, Traits Elem. Couch., pi. ii. 6gs. 4, 5. 

 Gastrochcena duhia, Jeffreys, Brit. Conch., vol. iii. p. 91, vol. v. pi. Ii. fig. 6. 

 Gastrochcena dubia, Hidalgo, Molusc. Espaiia, pi. xlix. figs. 3, 4. 



Habitat. — Harbour of St. Vincent, Cape Verde Islands and Tenerife, Canaries, in 70 

 fathoms. 



This species, ranging from the southern coasts of England to the Mediterranean, 

 Madeira, and Canary Islands, has not, I believe, hitherto been noticed so far south as the 

 Cape Verde Islands. The single specimen from that locality is a trifle more elongate 

 than those from Tenerife. 



Subfamily Clavagellin.e. 

 Clavagella, Lamarck. 



Clavagella torresi, n. sp. (PL VIII. figs. l-\h). 



Testa parva, tenuis, allia. Valva liliera valde insefjuilateralis, antice late rotundata, 

 postice paulo angustior, lineis incrementi subrugosis sculpta, liris tenuissimis granulosis 

 radiantibus umbones versus ornata. Pagina interna nitens, concentrice alicpianto rugosa, 

 radiatim indistincte substriata. Ligamentum internum parvum, oblicj[Uum, postice deuticuh > 

 minuto terminatum. Tubus inferne irregulariter ovatus, superne valde constrictus ct 

 angustatus, ad basim c[uoque ad latera tubulis multis instructus. 



