Mr. G. B. Sowerby on Hinniies. 67 



tber group (the Onlhophagi) whose males are similarly coruuted. It will 

 however require much attention and investigation to prove that these 

 "perfect" specimens are (as suggested in the work referred to) of an 

 intermediate sex, or a second sort of males, analogous to the Neuters 

 amongst the gregarious Flymenoplera. After a re-examination of up- 

 wards of 50 males, I have not been able to find intermediate specimens 

 between those with the sliort horns and the few with these organs much 

 enlarged. But may not this extraordinary developement be more ana- 

 logous to the occasional (but much rarer) acquisition of wings and 

 hemelytra in certain species of Ileteropterous Ilemiptera (Pj/rrlwcoris 

 apterus for instance) generally found without such indication of per- 

 fection ? 



NOTE 3. 

 At page 506, Vol. iii of the same work, it is stated, " that although 

 Omalium planum and its affinities, O. striatulum (Elonium Leach) 

 and some others appear not to have Stemmata (Ocelli) yet with the aid 

 of a good magnifier they may be discovered in most species of that 

 genus, as likewise in Eva>sthetus Grav." Also " that some species 

 of Anthophagi appear to want them." As it does not appear that the 

 authors have noticed Dallman's remarks on the subject, I have not 

 thought it necessary to cancel the extract. 



Art. V. Observations on the Shells of an Acephalous 

 Molluscum of the Famili/ of Pectinidae, for which the 

 Generic name of Hinnites has been proposed by M. 

 Defiance ; together with the characters of several 

 Species. By G. B. Sowerby, F.L.S., Sfc. 



The history of this genus, if genus it may be called, may be 

 summed up in a few words. Some years ago M. Defrance, ob- 

 serving among some fossils sent to him by M. Cortesi, some speci- 

 mens of an irregular bivalve, intermediate, as he considered it 

 between Spondylus and Oslrea, Lani., but not strictly referable 

 to either, proposed for the two species in his possession the 

 generic name of Ilwnitcs, under which article he soon afterwards 

 published an account of them in the Diet, des Sciences NuturcUes. 

 In a short time, so many specimens of this singular genus were to 

 E 2 



