ME. S. HANLET ON THE LINNEAN MS. OE THE 'MUSEUM ULBIC^.' 59 



M. FRONS. Ost. acutum plicatum, labio altero scabro. 



M. CRISTA-GALLI. Ost. acutum, plicatum, labio utroque scabro. 



The reading of the MS. was not " secundum marginem insculptus," but 

 " secundum marginem Mytilus." 



M. HYOTis. Ost. subacuto-plicatum imbricatum squamis compressis, 

 labio utrinque glabro. 



M. MARGARiTiFERUs. Ost . semiauritum, imbricatum tuuicis, basi 

 transversum. 



" Bonan. 2. f. 1." was the omitted synonym. The description of the 

 hinge was not at first inserted. 



M. UNGUIS. M. subrotundus, longitudinaliter striatus, pellucidus. 



This ambiguous species was not named, but placed next to Ostrea edulis. 

 I entertain but little doubt of its being a young Perna. 



M. LiTHOPHAGUS. M. cylindricus. 



Neither Gualtieri nor d'Argenville was referred to, which confirms my 

 idea that the species of the ' Museum ' (termed coriaceus in the manuscript) 

 was not the Mediterranean Lithodomus. 



M. BiLOCULARis. M. striatus, cardine fornicato. 



M. EXUSTUS. M. striatus, dorso angulato. 



M. EDULIS. M. laevis, subcurvatus, cardine terminali mutico. 



The printed synonyms are additions. From the " crassa," and the 

 " absque denticulo," it is by no means improbable that some large exotic 

 species was intended. The proposed name was niger ; and that word origi- 

 nally formed part of the heading, but had been erased by Linnaeus. 



M. UNGULATUS. M. Iseviusculus, valvis obliquis posticc dilatatis, aiitice 

 apice. 



" Lineis " was " tunicis " in the original. I do not consider that the 

 details of this species (the M. rusticus of the MS.) pertain, even generically, 

 to the ungulatus of the ' Systema.' 



The large Mytilus represented by Gualtieri was not quoted : the refer- 

 ence, on the contrary, was to the two Modiolce depicted by Rumphius 

 (" Rump. 151. t. A&. f. B. C. ") and to their Kleinian names (" Klein, 127. 

 Musculus acutus vulgaris, a. b. ") ; and to that genus, rather than to 

 Mytilus, does the account of the suture, and the final remark, apply. 



M. MODIOLUS. M. laevis, cardine sublaterali, margine dorsali dilatato. 



The erroneous, yet approximate, synonyms of Rumphius and Gualtieri 

 (the 4 H's of whose engraving represent 4 different shells) were not 

 quoted in the original. The species (for want of a good figure) was not 

 clearly defined until the twelfth edition of the ' Systema.' 



M. viRiDis. M. laevis membranaceus, cardine terminali. 



M. RUBER. M. rugosus, valvulis obliquis, postice dilatatis, margine 

 antico apicem aequante. 



The preceding mussel spoken of was not viridis, but ungulatus. The 

 reading was not " brevissimo, compresso," but " brevissime compresso." 



M. HiRUNDO. Os<. valvis bilobis, lobo anteriore angustiore longiore. 



" Bonan. 2. f. 57 " (error for 58) and " List. 220. f. 55" were quoted. 



