70 ZOOLOGY OF THE VOYAGE OE H.M.S. SAMARANG. 



67. FISSURELLA, Lamarck. 



1. Pissueella excelsa. PL XI. Eig. 5. Piss, testa elevato-eonica, coslis grandibus imequalibus 

 subsquamatis rude clathratis, margine crenulato, orificio parvo, subrotundato, postice inclinato ; albida aut 

 virescente. 



Hab. China Sea. 

 Mainly distinguished by its high conical form. 



68. CALYPTRiEA, Lamarck. 



1. CALYPTEiEA trigonalis. PI. IX. Pig. 7 a, b. Calyp. testa, trigono-ovata, profunda convexa, apice 

 uncinata, radiatim subtiliter plicato-corrugata, cyatho amplo ; albida^ lineis fuscis peculiariter reticulata. 



Hab. China Sea. 



The principal distinguishing features of this species are its triangular compression, 

 which is alike in all the specimens and not occasioned by any circumstances of attachment. 

 There is, also, a peculiarity in the reticulated marking which shows more or less distinctly a 

 radiate series of uncoloured patches, ranging like a frill around the apex. 



2. CALYPTEiEA DEPRESSA. PI. XL Pig. 2 a, b. Calyp. testa suborbiculari, depresso-conica, alba, 

 semipellucida, trilaminata, apice subcentrab, obtuso, radiatim corrugato-striata, cyatho crescentiformi, acuto, 

 prominente. 



Hab. China Sea. 



This species is composed of three laminge lying one upon the other after the manner 

 of C. tectum- Sinense, but compressed closely one upon the other. 



3. Calyptejla plana. PI. XL Pig. 3. Calyp. testa suboblonga, depresso-convexa, sellseformi, alba, 

 concentrice subtinssime lineata, apice laterali, cyatho arnplo, plano-laminato, ad latus emarginato. 



Hab. China Sea, adhering to the interior of dead shells. 



A flattened species, turned as it were inside outwards, and well characterized by the 

 term saddle-shaped. ^u)& 



4. CALYPTEiEA cancellata. PL XL Pig. 4. Calyp. testa orbiculari, irregulari, conica, apice sub- 

 laterali, retrorsum curvato, radiatim longitudiualiter costata, costis rugosis, medio sulcatis, interstitiis can- 

 cellatis, cyatho crescentiformi, prominulo. 



Hab. China Sea. 



Sculptured throughout with radiating ribs, down the middle of which there is for the 

 most part a fine groove. 



