462 Zoological Society. 



ovatd ; dentibus cardinalibus ut in T. psittacea ; margine valva- 



rum crenulato. 

 A single specimen of this very interesting species was found in 

 the collection of the late G. Humphrey, without locality. This and 

 the T. psittacea are the only species that are not punctated. 



Terebratula japonica. Ter. testa oblongd, antice rotundatd, tenui, 



albicante ; valvis subcequaliter convexis, longitudinaliter radiatim 



striatis, striis numerosis, subirregularibus, subbifurcatis, ad latera 



prope cardinem confer tiusculis ; lateribus prope cardinem subpla- 



nulatis ; lined marginali rectiusculd, ad latera postice declivi; 



valvd dorsali postice subproductd, truncatd ; foramine mediocri, 



hand integro, perobliquo ; ared cardinali inconspicud, deltidiis ob- 



soletis ; interno parvo, ± longitudinis valvce, ramulos duos angus- 



tos, demum amentum latum flexuosum sistente ; marginibus valva- 



rum minutissime denticulato. 



Shell oblong, rounded in front, thin, whitish ; valves nearly equally 



convex, longitudinally radiately striated, striae numerous, rather 



irregularly dichotomous and very close-set on the sides near the 



hinge ; the sides near the hinge rather flattened ; marginal line 



nearly straight, inclining to the sides near the hinge ; dorsal valve 



somewhat produced posteriorly and truncated, with a moderate-sized, 



very oblique and incomplete perforation ; cardinal area indistinct, 



with obsolete deltidia; internal appendages small, one-third the 



length of the valve, with two narrow little branches, and then a broad 



flexuous loop ; margin of the valves very minutely denticulated. 



In Mr. Cuming's collection, from Japan. Easily distinguished 

 from T. cancellata of Koch by its foramen not being entire. 



Terebratula crenulata. Ter. testd suborbiculari, postice subacu- 

 minatd, subtruncatd, crassiusculd, albicante ; valvis incequalibus, 

 radiatim costatis, costis paucis, majusculis, rotundatis ; lined mar- 

 ginali flexuosd, antice subsinuatd ; foramine magno, subintegro ; 

 ared cardinali magnd, subplanulatd, margine undulato ; deltidiis 

 magnis, discretis ; valvte ventralis margine postico ad utrumque 

 latus declivi ; ossiculo interno e spind validd obtusd antice por- 

 rectd, ramulis duobus lateralibus retroversis ; margine valvarum 

 crenato. 

 Shell suborbicular, rather attenuated and subtruncate behind, 

 rather thick and whitish ; valves unequal, with few rather large, 

 rounded, radiating ribs ; marginal line flexuous, slightly sinuated in 

 front ; perforation large, nearly entire ; cardinal area large, flattish, 

 with an undulated margin ; deltidia large, separate ; posterior mar- 

 gin of the ventral valve inclined on either side ; internal appendage 

 consisting of a single strong spine standing forward, and with two 

 lateral reflected branches ; margin of the valves crenated. 

 From Santa Cruz, in Mr. Cuming's collection. 

 Terebratula rosea, Humphrey. Ter. testd oblongo-ovali, subde- 

 pressd, antice subattenuatd, crassd, rosed, albicante radiatim pictd; 

 valvis subcequalibus , Icevibus ; lined marginali subfexuosd, antice 

 reflexd ; valvd dorsali majori, postice subproductd, truncatd ; fora- 



