70 



margine ventrali antice arcuato, postice sursum accUvi ; dorsali 

 antici magis minusve convexo satisįue declivi, postice recto et valde 

 declivi ; latere antico producto, ad extremitatem ohtuse rotundato ; 

 postico acuminato ; natibus acutis ; Ugamento vix prominulo ;flexurd 

 ventrali obsoletd ; cardine dente laterali antico parvo, approxi- 

 mato. Long. 0-35 ; lat. 0-55 poli. 

 Hab. Cagayan, province of Misamis, Mindanao ; twenty-five fa- 



tlioms, sandy mud. 



This species is closely allied to the tenuis of our own shores, but 



may be distinguished by its acuminated extremity. In young speci- 



mens there are indications of concentric strije near the front of the 



ventral margin. 



Tellina Corbuloides. Tel. testd subovali, inceguivalvi, solidd, sub- 

 ventricosd, subleevigatd, roseo-incarnatd (intus plenimque aurantio- 

 rubru) ; margine ventrali sinistrce valvula, ultra marginėm convex- 

 iusculum alterius.prominente ; latere antico breviore, obttise acumi- 

 nato ; exlremitate posticd rotiindatd ; ared dorsali posticd in 

 adultis subplanulatd ; natibus obtusis ; flexurd ventrali distinctd; 

 cardine dente laterali, parvo, approximato, antico. 



Var. Testd extus intusgue candidd. Long. 0*80 ; lat. 1-20 poli. 



Hab. Catbalonga, isle of Samar ; ten fathoms, soft mud. 



The general appearance of this shell gives us the idea of a Corbula. 

 It is covered when fresh \vith a thin fugacious epidermis, which re- 

 flects the most brilliant prismatie colours. 



Tellina Cycladiformis. Tel. testd parvd, rotundato-subtrigond , 

 tenui, ventricosd, intus extusque incarnatd aut pallide rosed, sub- 

 leevigatd ; margine ventrali convexo ; dorsali utrinque declivi, con- 

 vexiuscttlo ; latere antico rotundato et paullb breviore; extremitate 

 posticd obtuse subangtdatd ; Ugamento prominulo ; flexurd costdgue 

 umbonali obsoletis ; cardine dente laterali parvo, approximato, an- 

 tico. Long. 0-20; lat. 0-25. 



Hab. St. Nicholas, Zebu. 



Not unlike pisiformis, but destitute of obliąue strise, 



Tellina insculpta. Tel. testd oblongo-elongatd, solidiusculd, com- 

 pressd, <equilaterali, cxtus intusgue candidd; suleis confertis con- 

 centrice exaratd, striisque te7iuissi7nis radiantibus (prcBsertitn pos- 

 tice) decussatd ; margine ventrali elongato, subrecto ; dorsali 

 utringue subrecto, subdeclivi ; extremitate posticd subbiangulatd ; 

 flexurd ventrali distinctd; cardine dente laterali quamplurimum 

 approximato, antico. Long. 1 ; lat. 2 poli. 

 Hab. Chiriqui, West Columbia; sandy mud, three fathoms. 

 This uniąue and elegant shell possesses the shape and general ap- 

 pearance of a Psammobia. The single anterior lateral tooth is so 

 olose to the primaiy ones, that the hinge appears to be composed of 

 three cardinal teeth in the left valve. Beyond the almost obsolete 

 umbonal ridge the concentric sulci become broken into small scales. 

 The delicate radiating strise are quite obsolete in front. The shell 

 seems slightly inequivalve. 



