Mcditcri'iDndn Sppcits of Brachiopoda. 'M^t 



fishes and Crustacea ; consequently avc must not be surprised 

 to find so lar<;-e an amount of error in the work aljove speci- 

 fied. During his lifetime few were permitted access to his 

 collection, which at his death was found in great confusion ; 

 but since that time it has been put into good order, and is 

 liberally shown at the Villa Risso by his ne])hew, Sig. J. B. 

 Risso, consul of the Nicamguan rc])ublic. The shells have 

 been cleaned, remounted, and rearranged with much care by 

 Mr. Haas, a local amateur, likewise possessor of a fine series 

 of recent shells. From this examination I have determined 

 that :— 



Terebratula emar(jinata and T. quadrata^ Risso, are synonyms 

 of Terehvatulina caput-serpentis (Linnasus, sp.). 



Terebratula truncata^ Risso, is the Mecjerlea (Anomia) trmicata 

 of Linnaeus. 



Terebratula cuneata and T. Soldaniaiia, Risso, are both refer- 

 able to a single species, for which the designation of Arr/iojye 

 cuneata (Risso, sp.) must be retained. Orfh isjjera (Milhlfeldt) 

 is another synonym. 



Terebratula urna-antiqua, Risso, is undoubtedly a synonym 

 oi Argiope decollata (Gmelin, sp.). 



Terebratula cordata^ Risso. In this collection we find a spe- 

 cimen of Argiope [Ter.) nexqwlitana labelled as the type 

 of Risso's cordata^ which I am inclined to consider correct. 

 Risso did not figure his species ; and his description is in- 

 sufficient. I therefore question whether we are justified in 

 preferring the term cordata to the well-known one of ^4/-- 

 giope [Ter.) neapoUtana^ Scacehi, described in 183.'). 



Terebratula cardita, Risso. The figured specimen is no longer 

 in the collection; but an example of T. cordata, = A. 

 neapolitana, is labelled cardita. This is, no doubt, a mis- 

 take ; for the specimen does not resemble the figure, bad as 

 are all Risso's figures. ^Ir. Jeffreys and myself are of 

 opinion that the incorrect figure of T. cardita, upon which 

 Risso's description was ])robably founded, was a specimen 

 of Argiop)e decollata. Therefore it will be necessary to ex- 

 clude the term T. cardita from the list of ]\Iediterranean 

 Brachiopoda. 



Terebratula aculeata, Risso, is no longer to be found in the 

 collection ; and as no figure is appended to the otherwise 

 imperfect description, we are left without means of ascer- 

 taining what the shell really was ; and the name will require 

 to be erased from the list of Mediterranean shells. 



ThecidiuM mediterraneum, Risso, is a good and well-known 

 species. 



2S* 



