MOLLUSCA. 7 1 



CIRROBRANCHIATA. 

 69. DENTALIUM. 



1. Dentaliuh forhosum. PL V. Fig. 1 a, b. Dent, testa arcuata, tumidiuscula, tredecim-costata, 

 costis rotundatis, interstitiis latiusculis, extremitate postica dorsali fissurata, fissura apicem versus latiore ; 

 roseo, olivaceo-viridi et albo pulcherrime variegata. 



Hab. Sooloo Archipelago (outside a coral reef near the city of Sooloo, in about sixteen to twenty 

 fathoms, sandy mud) . 



A beautiful addition to a genus rarely distinguished by any brilliancy of colour beyond 

 the well-known green of the D. elepliantinum and aprinmn. It is of rather lighter and more 

 tumid growth than the former, richly variegated with rose, olive-green, and a little white. 



III. BRACHIOPODA. /«« 



70. TEREBRATULA. 



1. Terebratula Japonica. PI. XXI. Pig. 1. Ter. testa elongato-ovali, tumida, lsevi, fragili, pel- 

 lucido-alba, antice semicostata, costis postice evanidis, valvis subsequaliter convexis, margine ventrali vix 

 sinuato, crenulato, foramine parviusculo, rotundato. 



Hab. Seas of Japan. 



A semitransparent-white species, radiately finely ribbed towards the beaks, the ribs 

 soon fading away. 



2. Tekebratula angusta. PI. XXL Pig. 2. Ter. testa elongato-ovali, subcompressa, pellucido- 

 alba, longitudinaliter dense et subtilissime costellata, costellis rugulosis, rostro truncato, valvis fere sequa- 

 libus, medio leviter sulcato-depressis, margine ventrali, subsinuato. 



Hab. Seas of Japan. 



An extremely delicately-sculptured oblong species, allied to T. caput-serpentis. 



3. Terebratula Coreanica. PI. XXI. Pig. 3. Ter. testa rotundato-triangulari, ltevi, carneola, 

 radiatim carmineo fasciata, fasciis irregularibus, interruptis, valva dorsab: convexa, medio subcarinata, 

 ventrali planiore, latera versus subcompressa, foramine amplo ovali, utroque latere subangulato. 



Hab. Corean Archipelago. 



A smooth species, delicately painted with irregular crimson-scarlet rays. 



4. Terebratula Capensis. PI. XXL Fig. 4. Ter. testa subtriangulari, longitudinaliter costata, 

 crassiuscula, coccineo vivide radiata, valvis conspicue sinuatis et sulcatis, foramine subamplo. 



Hab. Cape of Good Hope. 



An interesting small species, dredged off the Cape of Good Hope at a depth of 120 

 fathoms. 



